/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/threaded-sum-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 02:48:59,696 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 02:48:59,698 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 02:48:59,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-22 02:48:59,768 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-Separate.epf [2021-05-22 02:48:59,794 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 02:48:59,794 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 02:48:59,795 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 02:48:59,795 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 02:48:59,796 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 02:48:59,797 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 02:48:59,797 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 02:48:59,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 02:48:59,797 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 02:48:59,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 02:48:59,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 02:48:59,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 02:48:59,798 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 02:48:59,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 02:48:59,798 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 02:48:59,798 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 02:48:59,798 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 02:48:59,798 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 02:48:59,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 02:48:59,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 02:48:59,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 02:48:59,799 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 02:48:59,799 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 02:48:59,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:48:59,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 02:48:59,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 02:48:59,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 02:48:59,799 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 02:48:59,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 02:48:59,799 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 02:48:59,799 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 02:48:59,799 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 02:48:59,800 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 02:49:00,047 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 02:49:00,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 02:49:00,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 02:49:00,064 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 02:49:00,066 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 02:49:00,066 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/threaded-sum-3.wvr.bpl [2021-05-22 02:49:00,066 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/threaded-sum-3.wvr.bpl' [2021-05-22 02:49:00,199 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 02:49:00,200 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 02:49:00,202 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 02:49:00,202 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 02:49:00,202 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 02:49:00,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:00" (1/1) ... [2021-05-22 02:49:00,216 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:00" (1/1) ... [2021-05-22 02:49:00,223 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 02:49:00,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 02:49:00,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 02:49:00,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 02:49:00,229 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:00" (1/1) ... [2021-05-22 02:49:00,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:00" (1/1) ... [2021-05-22 02:49:00,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:00" (1/1) ... [2021-05-22 02:49:00,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:00" (1/1) ... [2021-05-22 02:49:00,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:00" (1/1) ... [2021-05-22 02:49:00,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:00" (1/1) ... [2021-05-22 02:49:00,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:00" (1/1) ... [2021-05-22 02:49:00,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 02:49:00,235 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 02:49:00,235 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 02:49:00,235 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 02:49:00,236 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:00" (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 [2021-05-22 02:49:00,290 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-22 02:49:00,290 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-22 02:49:00,291 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-22 02:49:00,291 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-22 02:49:00,291 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-22 02:49:00,291 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-22 02:49:00,291 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 02:49:00,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 02:49:00,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 02:49:00,291 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-22 02:49:00,291 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-22 02:49:00,291 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-22 02:49:00,292 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-22 02:49:00,431 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 02:49:00,431 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-22 02:49:00,432 INFO L202 PluginConnector]: Adding new model threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:49:00 BoogieIcfgContainer [2021-05-22 02:49:00,432 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 02:49:00,433 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 02:49:00,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 02:49:00,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 02:49:00,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:00" (1/2) ... [2021-05-22 02:49:00,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76310f02 and model type threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 02:49:00, skipping insertion in model container [2021-05-22 02:49:00,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:49:00" (2/2) ... [2021-05-22 02:49:00,437 INFO L111 eAbstractionObserver]: Analyzing ICFG threaded-sum-3.wvr.bpl [2021-05-22 02:49:00,440 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 02:49:00,440 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 02:49:00,441 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 02:49:00,441 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 02:49:00,494 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-22 02:49:00,507 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 02:49:00,537 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:49:00,537 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:49:00,537 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:49:00,537 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:49:00,537 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:49:00,537 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:49:00,537 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:49:00,537 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 02:49:00,555 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 33 transitions, 90 flow [2021-05-22 02:49:00,577 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 138 states, 136 states have (on average 2.786764705882353) internal successors, (379), 137 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:00,580 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 136 states have (on average 2.786764705882353) internal successors, (379), 137 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:00,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:49:00,590 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:00,591 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:00,591 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:00,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:00,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1198606410, now seen corresponding path program 1 times [2021-05-22 02:49:00,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:00,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837561785] [2021-05-22 02:49:00,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:00,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:00,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:00,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837561785] [2021-05-22 02:49:00,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837561785] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:49:00,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:49:00,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:49:00,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108351987] [2021-05-22 02:49:00,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:49:00,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:00,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:49:00,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:49:00,748 INFO L87 Difference]: Start difference. First operand has 138 states, 136 states have (on average 2.786764705882353) internal successors, (379), 137 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2021-05-22 02:49:00,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:00,804 INFO L93 Difference]: Finished difference Result 186 states and 525 transitions. [2021-05-22 02:49:00,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:49:00,805 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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 [2021-05-22 02:49:00,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:00,818 INFO L225 Difference]: With dead ends: 186 [2021-05-22 02:49:00,819 INFO L226 Difference]: Without dead ends: 186 [2021-05-22 02:49:00,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:49:00,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-22 02:49:00,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 161. [2021-05-22 02:49:00,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.81875) internal successors, (451), 160 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:00,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 451 transitions. [2021-05-22 02:49:00,875 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 451 transitions. Word has length 21 [2021-05-22 02:49:00,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:00,876 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 451 transitions. [2021-05-22 02:49:00,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2021-05-22 02:49:00,877 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 451 transitions. [2021-05-22 02:49:00,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-22 02:49:00,881 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:00,881 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:00,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 02:49:00,882 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:00,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:00,884 INFO L82 PathProgramCache]: Analyzing trace with hash 2114235914, now seen corresponding path program 1 times [2021-05-22 02:49:00,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:00,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148493422] [2021-05-22 02:49:00,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:00,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:00,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148493422] [2021-05-22 02:49:00,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148493422] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:49:00,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:49:00,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:49:00,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804740400] [2021-05-22 02:49:00,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:49:00,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:00,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:49:00,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:49:00,922 INFO L87 Difference]: Start difference. First operand 161 states and 451 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:00,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:00,954 INFO L93 Difference]: Finished difference Result 151 states and 403 transitions. [2021-05-22 02:49:00,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:49:00,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-22 02:49:00,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:00,957 INFO L225 Difference]: With dead ends: 151 [2021-05-22 02:49:00,957 INFO L226 Difference]: Without dead ends: 151 [2021-05-22 02:49:00,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:49:00,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-22 02:49:00,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-05-22 02:49:00,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.6866666666666665) internal successors, (403), 150 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:00,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 403 transitions. [2021-05-22 02:49:00,971 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 403 transitions. Word has length 23 [2021-05-22 02:49:00,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:00,971 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 403 transitions. [2021-05-22 02:49:00,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:00,972 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 403 transitions. [2021-05-22 02:49:00,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-22 02:49:00,975 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:00,975 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:00,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-22 02:49:00,976 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:00,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:00,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1683683079, now seen corresponding path program 1 times [2021-05-22 02:49:00,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:00,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140796015] [2021-05-22 02:49:00,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:00,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:01,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:01,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:01,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140796015] [2021-05-22 02:49:01,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140796015] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:49:01,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:49:01,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:49:01,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308769536] [2021-05-22 02:49:01,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:49:01,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:01,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:49:01,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:49:01,017 INFO L87 Difference]: Start difference. First operand 151 states and 403 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:01,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:01,067 INFO L93 Difference]: Finished difference Result 223 states and 619 transitions. [2021-05-22 02:49:01,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:49:01,068 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-22 02:49:01,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:01,069 INFO L225 Difference]: With dead ends: 223 [2021-05-22 02:49:01,069 INFO L226 Difference]: Without dead ends: 223 [2021-05-22 02:49:01,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:49:01,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-05-22 02:49:01,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2021-05-22 02:49:01,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.7882882882882885) internal successors, (619), 222 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:01,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 619 transitions. [2021-05-22 02:49:01,077 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 619 transitions. Word has length 26 [2021-05-22 02:49:01,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:01,077 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 619 transitions. [2021-05-22 02:49:01,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:01,077 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 619 transitions. [2021-05-22 02:49:01,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-22 02:49:01,078 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:01,078 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:01,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 02:49:01,078 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:01,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:01,078 INFO L82 PathProgramCache]: Analyzing trace with hash 71290013, now seen corresponding path program 1 times [2021-05-22 02:49:01,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:01,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388526838] [2021-05-22 02:49:01,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:01,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:49:01,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:01,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388526838] [2021-05-22 02:49:01,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388526838] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:49:01,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:49:01,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:49:01,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613167557] [2021-05-22 02:49:01,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:49:01,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:01,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:49:01,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:49:01,132 INFO L87 Difference]: Start difference. First operand 223 states and 619 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:01,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:01,182 INFO L93 Difference]: Finished difference Result 344 states and 930 transitions. [2021-05-22 02:49:01,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:49:01,183 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-22 02:49:01,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:01,186 INFO L225 Difference]: With dead ends: 344 [2021-05-22 02:49:01,186 INFO L226 Difference]: Without dead ends: 308 [2021-05-22 02:49:01,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:49:01,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-05-22 02:49:01,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 235. [2021-05-22 02:49:01,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.8076923076923075) internal successors, (657), 234 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:01,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 657 transitions. [2021-05-22 02:49:01,207 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 657 transitions. Word has length 28 [2021-05-22 02:49:01,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:01,207 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 657 transitions. [2021-05-22 02:49:01,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:01,207 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 657 transitions. [2021-05-22 02:49:01,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:49:01,208 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:01,208 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:01,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-22 02:49:01,208 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:01,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:01,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1179461309, now seen corresponding path program 2 times [2021-05-22 02:49:01,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:01,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489119488] [2021-05-22 02:49:01,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:01,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:49:01,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:01,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489119488] [2021-05-22 02:49:01,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489119488] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:01,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076675396] [2021-05-22 02:49:01,287 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 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 [2021-05-22 02:49:01,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:49:01,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:01,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:49:01,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:01,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:49:01,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076675396] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:01,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:01,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:49:01,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120599384] [2021-05-22 02:49:01,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:49:01,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:01,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:49:01,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:49:01,595 INFO L87 Difference]: Start difference. First operand 235 states and 657 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:02,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:02,146 INFO L93 Difference]: Finished difference Result 545 states and 1518 transitions. [2021-05-22 02:49:02,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:49:02,146 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:49:02,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:02,148 INFO L225 Difference]: With dead ends: 545 [2021-05-22 02:49:02,148 INFO L226 Difference]: Without dead ends: 545 [2021-05-22 02:49:02,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 414.5ms TimeCoverageRelationStatistics Valid=262, Invalid=730, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:49:02,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-05-22 02:49:02,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 312. [2021-05-22 02:49:02,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9485530546623795) internal successors, (917), 311 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:02,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 917 transitions. [2021-05-22 02:49:02,171 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 917 transitions. Word has length 30 [2021-05-22 02:49:02,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:02,171 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 917 transitions. [2021-05-22 02:49:02,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:02,171 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 917 transitions. [2021-05-22 02:49:02,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:49:02,172 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:02,172 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:02,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:02,390 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:02,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:02,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1066258745, now seen corresponding path program 3 times [2021-05-22 02:49:02,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:02,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617222338] [2021-05-22 02:49:02,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:02,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:02,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:02,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:02,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617222338] [2021-05-22 02:49:02,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617222338] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:02,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611294175] [2021-05-22 02:49:02,458 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 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 [2021-05-22 02:49:02,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:49:02,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:02,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:49:02,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:02,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611294175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:02,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:02,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:49:02,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760249237] [2021-05-22 02:49:02,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:49:02,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:02,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:49:02,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:49:02,647 INFO L87 Difference]: Start difference. First operand 312 states and 917 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:03,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:03,319 INFO L93 Difference]: Finished difference Result 874 states and 2542 transitions. [2021-05-22 02:49:03,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-22 02:49:03,322 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:49:03,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:03,326 INFO L225 Difference]: With dead ends: 874 [2021-05-22 02:49:03,326 INFO L226 Difference]: Without dead ends: 874 [2021-05-22 02:49:03,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 523.0ms TimeCoverageRelationStatistics Valid=387, Invalid=1019, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:49:03,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-05-22 02:49:03,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 392. [2021-05-22 02:49:03,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 3.0051150895140664) internal successors, (1175), 391 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:03,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1175 transitions. [2021-05-22 02:49:03,355 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1175 transitions. Word has length 30 [2021-05-22 02:49:03,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:03,357 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 1175 transitions. [2021-05-22 02:49:03,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:03,357 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1175 transitions. [2021-05-22 02:49:03,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:49:03,359 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:03,359 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:03,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-22 02:49:03,573 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:03,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:03,574 INFO L82 PathProgramCache]: Analyzing trace with hash -887660733, now seen corresponding path program 4 times [2021-05-22 02:49:03,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:03,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262448100] [2021-05-22 02:49:03,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:03,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:49:03,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:03,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262448100] [2021-05-22 02:49:03,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262448100] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:03,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734613776] [2021-05-22 02:49:03,687 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 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 [2021-05-22 02:49:03,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:49:03,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:03,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:49:03,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:49:03,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734613776] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:03,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:03,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-05-22 02:49:03,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289187634] [2021-05-22 02:49:03,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:49:03,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:03,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:49:03,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:49:03,990 INFO L87 Difference]: Start difference. First operand 392 states and 1175 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:04,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:04,177 INFO L93 Difference]: Finished difference Result 800 states and 2390 transitions. [2021-05-22 02:49:04,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:49:04,177 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:49:04,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:04,180 INFO L225 Difference]: With dead ends: 800 [2021-05-22 02:49:04,180 INFO L226 Difference]: Without dead ends: 800 [2021-05-22 02:49:04,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 143.9ms TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:49:04,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-05-22 02:49:04,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 521. [2021-05-22 02:49:04,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 3.1134615384615385) internal successors, (1619), 520 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:04,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1619 transitions. [2021-05-22 02:49:04,193 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1619 transitions. Word has length 30 [2021-05-22 02:49:04,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:04,194 INFO L482 AbstractCegarLoop]: Abstraction has 521 states and 1619 transitions. [2021-05-22 02:49:04,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:04,194 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1619 transitions. [2021-05-22 02:49:04,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:49:04,195 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:04,195 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:04,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-22 02:49:04,409 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:04,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:04,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1202859447, now seen corresponding path program 5 times [2021-05-22 02:49:04,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:04,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257606511] [2021-05-22 02:49:04,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:04,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:04,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:04,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257606511] [2021-05-22 02:49:04,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257606511] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:04,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133780505] [2021-05-22 02:49:04,471 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 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 [2021-05-22 02:49:04,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:49:04,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:04,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:49:04,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:04,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:04,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133780505] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:04,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:04,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-05-22 02:49:04,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539600979] [2021-05-22 02:49:04,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:49:04,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:04,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:49:04,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:49:04,648 INFO L87 Difference]: Start difference. First operand 521 states and 1619 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:05,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:05,373 INFO L93 Difference]: Finished difference Result 2062 states and 6284 transitions. [2021-05-22 02:49:05,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-22 02:49:05,373 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:49:05,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:05,381 INFO L225 Difference]: With dead ends: 2062 [2021-05-22 02:49:05,381 INFO L226 Difference]: Without dead ends: 2062 [2021-05-22 02:49:05,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 566.8ms TimeCoverageRelationStatistics Valid=593, Invalid=1569, Unknown=0, NotChecked=0, Total=2162 [2021-05-22 02:49:05,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2021-05-22 02:49:05,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1269. [2021-05-22 02:49:05,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1268 states have (on average 3.1553627760252367) internal successors, (4001), 1268 states have internal predecessors, (4001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:05,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 4001 transitions. [2021-05-22 02:49:05,413 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 4001 transitions. Word has length 30 [2021-05-22 02:49:05,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:05,413 INFO L482 AbstractCegarLoop]: Abstraction has 1269 states and 4001 transitions. [2021-05-22 02:49:05,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:05,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 4001 transitions. [2021-05-22 02:49:05,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:49:05,417 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:05,417 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:05,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:05,634 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:05,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:05,634 INFO L82 PathProgramCache]: Analyzing trace with hash -180076409, now seen corresponding path program 6 times [2021-05-22 02:49:05,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:05,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452539633] [2021-05-22 02:49:05,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:05,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:05,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:05,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:05,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452539633] [2021-05-22 02:49:05,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452539633] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:05,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034987431] [2021-05-22 02:49:05,677 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-22 02:49:05,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:49:05,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:05,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:49:05,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:05,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:05,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034987431] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:05,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:05,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-05-22 02:49:05,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350895923] [2021-05-22 02:49:05,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:49:05,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:05,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:49:05,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:49:05,757 INFO L87 Difference]: Start difference. First operand 1269 states and 4001 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:05,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:05,883 INFO L93 Difference]: Finished difference Result 1797 states and 5545 transitions. [2021-05-22 02:49:05,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:49:05,884 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:49:05,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:05,890 INFO L225 Difference]: With dead ends: 1797 [2021-05-22 02:49:05,890 INFO L226 Difference]: Without dead ends: 1797 [2021-05-22 02:49:05,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:49:05,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2021-05-22 02:49:05,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 1209. [2021-05-22 02:49:05,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1208 states have (on average 3.138245033112583) internal successors, (3791), 1208 states have internal predecessors, (3791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:05,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 3791 transitions. [2021-05-22 02:49:05,916 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 3791 transitions. Word has length 30 [2021-05-22 02:49:05,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:05,916 INFO L482 AbstractCegarLoop]: Abstraction has 1209 states and 3791 transitions. [2021-05-22 02:49:05,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:05,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 3791 transitions. [2021-05-22 02:49:05,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-22 02:49:05,918 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:05,918 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:06,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-22 02:49:06,133 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:06,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:06,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1004171587, now seen corresponding path program 7 times [2021-05-22 02:49:06,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:06,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511550622] [2021-05-22 02:49:06,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:06,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:06,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511550622] [2021-05-22 02:49:06,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511550622] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:06,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204514075] [2021-05-22 02:49:06,183 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 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 [2021-05-22 02:49:06,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:06,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-22 02:49:06,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:06,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204514075] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:06,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:06,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-05-22 02:49:06,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742059735] [2021-05-22 02:49:06,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:49:06,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:06,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:49:06,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:49:06,260 INFO L87 Difference]: Start difference. First operand 1209 states and 3791 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:06,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:06,371 INFO L93 Difference]: Finished difference Result 2345 states and 7301 transitions. [2021-05-22 02:49:06,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:49:06,371 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-22 02:49:06,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:06,379 INFO L225 Difference]: With dead ends: 2345 [2021-05-22 02:49:06,379 INFO L226 Difference]: Without dead ends: 2345 [2021-05-22 02:49:06,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:49:06,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2021-05-22 02:49:06,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 1749. [2021-05-22 02:49:06,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.230549199084668) internal successors, (5647), 1748 states have internal predecessors, (5647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:06,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 5647 transitions. [2021-05-22 02:49:06,418 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 5647 transitions. Word has length 30 [2021-05-22 02:49:06,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:06,418 INFO L482 AbstractCegarLoop]: Abstraction has 1749 states and 5647 transitions. [2021-05-22 02:49:06,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:06,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 5647 transitions. [2021-05-22 02:49:06,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:49:06,422 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:06,423 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:06,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:06,641 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:06,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:06,641 INFO L82 PathProgramCache]: Analyzing trace with hash 612200489, now seen corresponding path program 8 times [2021-05-22 02:49:06,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:06,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33356872] [2021-05-22 02:49:06,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:49:06,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:06,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33356872] [2021-05-22 02:49:06,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33356872] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:06,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474416702] [2021-05-22 02:49:06,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:49:06,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:49:06,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:06,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-22 02:49:06,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:06,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:49:06,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474416702] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:06,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:06,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-05-22 02:49:06,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464832875] [2021-05-22 02:49:06,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:49:06,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:06,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:49:06,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:49:06,933 INFO L87 Difference]: Start difference. First operand 1749 states and 5647 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:07,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:07,394 INFO L93 Difference]: Finished difference Result 2383 states and 7508 transitions. [2021-05-22 02:49:07,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:49:07,394 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:49:07,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:07,402 INFO L225 Difference]: With dead ends: 2383 [2021-05-22 02:49:07,402 INFO L226 Difference]: Without dead ends: 2383 [2021-05-22 02:49:07,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 339.0ms TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:49:07,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2021-05-22 02:49:07,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 1915. [2021-05-22 02:49:07,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1914 states have (on average 3.239811912225705) internal successors, (6201), 1914 states have internal predecessors, (6201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:07,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 6201 transitions. [2021-05-22 02:49:07,443 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 6201 transitions. Word has length 32 [2021-05-22 02:49:07,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:07,443 INFO L482 AbstractCegarLoop]: Abstraction has 1915 states and 6201 transitions. [2021-05-22 02:49:07,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:07,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 6201 transitions. [2021-05-22 02:49:07,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:49:07,446 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:07,447 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:07,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:07,661 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:07,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:07,661 INFO L82 PathProgramCache]: Analyzing trace with hash 533920293, now seen corresponding path program 9 times [2021-05-22 02:49:07,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:07,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387190227] [2021-05-22 02:49:07,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:49:07,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:07,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387190227] [2021-05-22 02:49:07,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387190227] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:07,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477769481] [2021-05-22 02:49:07,704 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 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 [2021-05-22 02:49:07,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:49:07,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:07,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-22 02:49:07,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:07,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477769481] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:07,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:07,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-05-22 02:49:07,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993750186] [2021-05-22 02:49:07,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:49:07,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:07,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:49:07,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:49:07,847 INFO L87 Difference]: Start difference. First operand 1915 states and 6201 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2021-05-22 02:49:08,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:08,344 INFO L93 Difference]: Finished difference Result 3613 states and 11319 transitions. [2021-05-22 02:49:08,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-22 02:49:08,344 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:49:08,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:08,356 INFO L225 Difference]: With dead ends: 3613 [2021-05-22 02:49:08,356 INFO L226 Difference]: Without dead ends: 3613 [2021-05-22 02:49:08,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 389.6ms TimeCoverageRelationStatistics Valid=501, Invalid=1139, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:49:08,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3613 states. [2021-05-22 02:49:08,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3613 to 2052. [2021-05-22 02:49:08,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 2051 states have (on average 3.2457337883959045) internal successors, (6657), 2051 states have internal predecessors, (6657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:08,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 6657 transitions. [2021-05-22 02:49:08,404 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 6657 transitions. Word has length 32 [2021-05-22 02:49:08,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:08,404 INFO L482 AbstractCegarLoop]: Abstraction has 2052 states and 6657 transitions. [2021-05-22 02:49:08,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2021-05-22 02:49:08,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 6657 transitions. [2021-05-22 02:49:08,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:49:08,408 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:08,408 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:08,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-22 02:49:08,624 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:08,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:08,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1903600235, now seen corresponding path program 10 times [2021-05-22 02:49:08,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:08,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539391512] [2021-05-22 02:49:08,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:08,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:08,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539391512] [2021-05-22 02:49:08,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539391512] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:08,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754593793] [2021-05-22 02:49:08,711 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 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 [2021-05-22 02:49:08,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:49:08,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:08,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-22 02:49:08,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:08,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:08,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754593793] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:08,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:08,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-05-22 02:49:08,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766238758] [2021-05-22 02:49:08,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:49:08,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:08,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:49:08,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:49:08,839 INFO L87 Difference]: Start difference. First operand 2052 states and 6657 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-05-22 02:49:09,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:09,115 INFO L93 Difference]: Finished difference Result 4372 states and 13767 transitions. [2021-05-22 02:49:09,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:49:09,115 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 32 [2021-05-22 02:49:09,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:09,130 INFO L225 Difference]: With dead ends: 4372 [2021-05-22 02:49:09,130 INFO L226 Difference]: Without dead ends: 4372 [2021-05-22 02:49:09,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 233.8ms TimeCoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:49:09,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4372 states. [2021-05-22 02:49:09,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4372 to 3140. [2021-05-22 02:49:09,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 3139 states have (on average 3.294361261548264) internal successors, (10341), 3139 states have internal predecessors, (10341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:09,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 10341 transitions. [2021-05-22 02:49:09,204 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 10341 transitions. Word has length 32 [2021-05-22 02:49:09,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:09,204 INFO L482 AbstractCegarLoop]: Abstraction has 3140 states and 10341 transitions. [2021-05-22 02:49:09,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-05-22 02:49:09,204 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 10341 transitions. [2021-05-22 02:49:09,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:49:09,209 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:09,209 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:09,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:09,427 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:09,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:09,427 INFO L82 PathProgramCache]: Analyzing trace with hash -2089630951, now seen corresponding path program 11 times [2021-05-22 02:49:09,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:09,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014171838] [2021-05-22 02:49:09,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:09,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:09,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014171838] [2021-05-22 02:49:09,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014171838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:09,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104478031] [2021-05-22 02:49:09,506 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 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 [2021-05-22 02:49:09,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:49:09,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:09,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:49:09,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:09,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104478031] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:09,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:09,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-05-22 02:49:09,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064074286] [2021-05-22 02:49:09,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:49:09,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:09,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:49:09,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:49:09,712 INFO L87 Difference]: Start difference. First operand 3140 states and 10341 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:11,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:11,000 INFO L93 Difference]: Finished difference Result 9020 states and 28737 transitions. [2021-05-22 02:49:11,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-22 02:49:11,001 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:49:11,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:11,017 INFO L225 Difference]: With dead ends: 9020 [2021-05-22 02:49:11,018 INFO L226 Difference]: Without dead ends: 9020 [2021-05-22 02:49:11,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 952.9ms TimeCoverageRelationStatistics Valid=1159, Invalid=3397, Unknown=0, NotChecked=0, Total=4556 [2021-05-22 02:49:11,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9020 states. [2021-05-22 02:49:11,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9020 to 5832. [2021-05-22 02:49:11,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5832 states, 5831 states have (on average 3.3656319670725434) internal successors, (19625), 5831 states have internal predecessors, (19625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:11,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5832 states to 5832 states and 19625 transitions. [2021-05-22 02:49:11,162 INFO L78 Accepts]: Start accepts. Automaton has 5832 states and 19625 transitions. Word has length 32 [2021-05-22 02:49:11,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:11,163 INFO L482 AbstractCegarLoop]: Abstraction has 5832 states and 19625 transitions. [2021-05-22 02:49:11,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:11,163 INFO L276 IsEmpty]: Start isEmpty. Operand 5832 states and 19625 transitions. [2021-05-22 02:49:11,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:49:11,171 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:11,171 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:11,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:11,389 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:11,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:11,389 INFO L82 PathProgramCache]: Analyzing trace with hash -379569387, now seen corresponding path program 12 times [2021-05-22 02:49:11,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:11,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595124623] [2021-05-22 02:49:11,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:11,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:11,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:11,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:11,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595124623] [2021-05-22 02:49:11,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595124623] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:11,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179638378] [2021-05-22 02:49:11,472 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 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 [2021-05-22 02:49:11,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:49:11,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:11,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-22 02:49:11,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:11,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:11,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179638378] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:11,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:11,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 17 [2021-05-22 02:49:11,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814583325] [2021-05-22 02:49:11,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:49:11,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:11,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:49:11,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:49:11,593 INFO L87 Difference]: Start difference. First operand 5832 states and 19625 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:12,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:12,473 INFO L93 Difference]: Finished difference Result 12646 states and 40893 transitions. [2021-05-22 02:49:12,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-22 02:49:12,475 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-22 02:49:12,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:12,500 INFO L225 Difference]: With dead ends: 12646 [2021-05-22 02:49:12,500 INFO L226 Difference]: Without dead ends: 12646 [2021-05-22 02:49:12,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 614.5ms TimeCoverageRelationStatistics Valid=883, Invalid=2087, Unknown=0, NotChecked=0, Total=2970 [2021-05-22 02:49:12,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12646 states. [2021-05-22 02:49:12,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12646 to 6547. [2021-05-22 02:49:12,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6547 states, 6546 states have (on average 3.340360525511763) internal successors, (21866), 6546 states have internal predecessors, (21866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:12,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6547 states to 6547 states and 21866 transitions. [2021-05-22 02:49:12,673 INFO L78 Accepts]: Start accepts. Automaton has 6547 states and 21866 transitions. Word has length 32 [2021-05-22 02:49:12,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:12,673 INFO L482 AbstractCegarLoop]: Abstraction has 6547 states and 21866 transitions. [2021-05-22 02:49:12,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:12,674 INFO L276 IsEmpty]: Start isEmpty. Operand 6547 states and 21866 transitions. [2021-05-22 02:49:12,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:49:12,683 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:12,683 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:12,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-22 02:49:12,897 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:12,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:12,897 INFO L82 PathProgramCache]: Analyzing trace with hash -2122812367, now seen corresponding path program 13 times [2021-05-22 02:49:12,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:12,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716859538] [2021-05-22 02:49:12,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:12,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:12,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:49:12,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:12,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716859538] [2021-05-22 02:49:12,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716859538] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:12,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582376934] [2021-05-22 02:49:12,945 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 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 [2021-05-22 02:49:12,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:12,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:49:12,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:49:13,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582376934] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:13,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:13,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-05-22 02:49:13,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192733731] [2021-05-22 02:49:13,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:49:13,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:13,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:49:13,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:49:13,035 INFO L87 Difference]: Start difference. First operand 6547 states and 21866 transitions. Second operand has 10 states, 10 states have (on average 3.1) 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) [2021-05-22 02:49:13,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:13,125 INFO L93 Difference]: Finished difference Result 8397 states and 27709 transitions. [2021-05-22 02:49:13,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:49:13,126 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) 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 32 [2021-05-22 02:49:13,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:13,141 INFO L225 Difference]: With dead ends: 8397 [2021-05-22 02:49:13,141 INFO L226 Difference]: Without dead ends: 8397 [2021-05-22 02:49:13,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:49:13,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8397 states. [2021-05-22 02:49:13,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8397 to 6574. [2021-05-22 02:49:13,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6574 states, 6573 states have (on average 3.3476342613722805) internal successors, (22004), 6573 states have internal predecessors, (22004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:13,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6574 states to 6574 states and 22004 transitions. [2021-05-22 02:49:13,312 INFO L78 Accepts]: Start accepts. Automaton has 6574 states and 22004 transitions. Word has length 32 [2021-05-22 02:49:13,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:13,312 INFO L482 AbstractCegarLoop]: Abstraction has 6574 states and 22004 transitions. [2021-05-22 02:49:13,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) 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) [2021-05-22 02:49:13,312 INFO L276 IsEmpty]: Start isEmpty. Operand 6574 states and 22004 transitions. [2021-05-22 02:49:13,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:49:13,322 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:13,322 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:13,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-22 02:49:13,537 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:13,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:13,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1254099961, now seen corresponding path program 14 times [2021-05-22 02:49:13,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:13,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938950991] [2021-05-22 02:49:13,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:13,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:49:13,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:13,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938950991] [2021-05-22 02:49:13,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938950991] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:13,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266182992] [2021-05-22 02:49:13,770 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 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 [2021-05-22 02:49:13,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:49:13,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:13,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:49:13,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:14,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266182992] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:14,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:14,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-05-22 02:49:14,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877557620] [2021-05-22 02:49:14,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:49:14,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:14,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:49:14,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:49:14,336 INFO L87 Difference]: Start difference. First operand 6574 states and 22004 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:16,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:16,012 INFO L93 Difference]: Finished difference Result 8244 states and 26601 transitions. [2021-05-22 02:49:16,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-22 02:49:16,012 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:49:16,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:16,026 INFO L225 Difference]: With dead ends: 8244 [2021-05-22 02:49:16,027 INFO L226 Difference]: Without dead ends: 8170 [2021-05-22 02:49:16,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1271.3ms TimeCoverageRelationStatistics Valid=468, Invalid=2612, Unknown=0, NotChecked=0, Total=3080 [2021-05-22 02:49:16,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8170 states. [2021-05-22 02:49:16,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8170 to 6796. [2021-05-22 02:49:16,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6796 states, 6795 states have (on average 3.33495217071376) internal successors, (22661), 6795 states have internal predecessors, (22661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:16,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6796 states to 6796 states and 22661 transitions. [2021-05-22 02:49:16,171 INFO L78 Accepts]: Start accepts. Automaton has 6796 states and 22661 transitions. Word has length 34 [2021-05-22 02:49:16,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:16,171 INFO L482 AbstractCegarLoop]: Abstraction has 6796 states and 22661 transitions. [2021-05-22 02:49:16,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:16,171 INFO L276 IsEmpty]: Start isEmpty. Operand 6796 states and 22661 transitions. [2021-05-22 02:49:16,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:49:16,184 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:16,184 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:16,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-22 02:49:16,401 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:16,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:16,401 INFO L82 PathProgramCache]: Analyzing trace with hash -695063545, now seen corresponding path program 15 times [2021-05-22 02:49:16,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:16,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372424138] [2021-05-22 02:49:16,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:16,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:16,654 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:16,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:16,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372424138] [2021-05-22 02:49:16,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372424138] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:16,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325936760] [2021-05-22 02:49:16,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:49:16,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:49:16,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:16,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:49:16,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:17,239 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:17,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325936760] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:17,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:17,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-05-22 02:49:17,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349971499] [2021-05-22 02:49:17,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-22 02:49:17,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:17,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-22 02:49:17,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:49:17,241 INFO L87 Difference]: Start difference. First operand 6796 states and 22661 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:20,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:20,568 INFO L93 Difference]: Finished difference Result 12070 states and 38381 transitions. [2021-05-22 02:49:20,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-22 02:49:20,569 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:49:20,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:20,590 INFO L225 Difference]: With dead ends: 12070 [2021-05-22 02:49:20,590 INFO L226 Difference]: Without dead ends: 11996 [2021-05-22 02:49:20,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2293 ImplicationChecksByTransitivity, 2514.0ms TimeCoverageRelationStatistics Valid=1280, Invalid=6376, Unknown=0, NotChecked=0, Total=7656 [2021-05-22 02:49:20,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11996 states. [2021-05-22 02:49:20,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11996 to 7004. [2021-05-22 02:49:20,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7004 states, 7003 states have (on average 3.3399971440811083) internal successors, (23390), 7003 states have internal predecessors, (23390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:20,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7004 states to 7004 states and 23390 transitions. [2021-05-22 02:49:20,767 INFO L78 Accepts]: Start accepts. Automaton has 7004 states and 23390 transitions. Word has length 34 [2021-05-22 02:49:20,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:20,767 INFO L482 AbstractCegarLoop]: Abstraction has 7004 states and 23390 transitions. [2021-05-22 02:49:20,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:20,767 INFO L276 IsEmpty]: Start isEmpty. Operand 7004 states and 23390 transitions. [2021-05-22 02:49:20,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:49:20,776 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:20,777 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:20,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:20,977 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:20,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:20,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1711109379, now seen corresponding path program 16 times [2021-05-22 02:49:20,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:20,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74611531] [2021-05-22 02:49:20,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:20,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:21,183 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:21,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:21,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74611531] [2021-05-22 02:49:21,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74611531] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:21,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148250766] [2021-05-22 02:49:21,184 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 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 [2021-05-22 02:49:21,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:49:21,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:21,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:49:21,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:21,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148250766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:21,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:21,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 02:49:21,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034777912] [2021-05-22 02:49:21,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:49:21,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:21,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:49:21,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:49:21,847 INFO L87 Difference]: Start difference. First operand 7004 states and 23390 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:23,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:23,910 INFO L93 Difference]: Finished difference Result 13107 states and 41620 transitions. [2021-05-22 02:49:23,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-22 02:49:23,910 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:49:23,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:23,930 INFO L225 Difference]: With dead ends: 13107 [2021-05-22 02:49:23,930 INFO L226 Difference]: Without dead ends: 13046 [2021-05-22 02:49:23,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1913.0ms TimeCoverageRelationStatistics Valid=901, Invalid=3929, Unknown=0, NotChecked=0, Total=4830 [2021-05-22 02:49:23,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13046 states. [2021-05-22 02:49:24,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13046 to 7052. [2021-05-22 02:49:24,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7052 states, 7051 states have (on average 3.3450574386611827) internal successors, (23586), 7051 states have internal predecessors, (23586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:24,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7052 states to 7052 states and 23586 transitions. [2021-05-22 02:49:24,093 INFO L78 Accepts]: Start accepts. Automaton has 7052 states and 23586 transitions. Word has length 34 [2021-05-22 02:49:24,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:24,093 INFO L482 AbstractCegarLoop]: Abstraction has 7052 states and 23586 transitions. [2021-05-22 02:49:24,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:24,093 INFO L276 IsEmpty]: Start isEmpty. Operand 7052 states and 23586 transitions. [2021-05-22 02:49:24,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:49:24,103 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:24,103 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:24,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:24,321 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:24,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:24,322 INFO L82 PathProgramCache]: Analyzing trace with hash -316136445, now seen corresponding path program 17 times [2021-05-22 02:49:24,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:24,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959147199] [2021-05-22 02:49:24,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:24,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:24,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959147199] [2021-05-22 02:49:24,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959147199] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:24,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848806906] [2021-05-22 02:49:24,547 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 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 [2021-05-22 02:49:24,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:49:24,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:24,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:49:24,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:25,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848806906] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:25,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:25,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-05-22 02:49:25,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553569359] [2021-05-22 02:49:25,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-22 02:49:25,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:25,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-22 02:49:25,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:49:25,170 INFO L87 Difference]: Start difference. First operand 7052 states and 23586 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:28,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:28,279 INFO L93 Difference]: Finished difference Result 15153 states and 48281 transitions. [2021-05-22 02:49:28,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-22 02:49:28,279 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:49:28,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:28,304 INFO L225 Difference]: With dead ends: 15153 [2021-05-22 02:49:28,304 INFO L226 Difference]: Without dead ends: 15073 [2021-05-22 02:49:28,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2261 ImplicationChecksByTransitivity, 2499.0ms TimeCoverageRelationStatistics Valid=1274, Invalid=6558, Unknown=0, NotChecked=0, Total=7832 [2021-05-22 02:49:28,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15073 states. [2021-05-22 02:49:28,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15073 to 7120. [2021-05-22 02:49:28,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7120 states, 7119 states have (on average 3.345975558364939) internal successors, (23820), 7119 states have internal predecessors, (23820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:28,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7120 states to 7120 states and 23820 transitions. [2021-05-22 02:49:28,478 INFO L78 Accepts]: Start accepts. Automaton has 7120 states and 23820 transitions. Word has length 34 [2021-05-22 02:49:28,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:28,478 INFO L482 AbstractCegarLoop]: Abstraction has 7120 states and 23820 transitions. [2021-05-22 02:49:28,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:28,478 INFO L276 IsEmpty]: Start isEmpty. Operand 7120 states and 23820 transitions. [2021-05-22 02:49:28,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:49:28,489 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:28,489 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:28,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:28,713 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:28,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:28,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1006112687, now seen corresponding path program 18 times [2021-05-22 02:49:28,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:28,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754645838] [2021-05-22 02:49:28,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:28,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:28,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:28,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754645838] [2021-05-22 02:49:28,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754645838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:28,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532934139] [2021-05-22 02:49:28,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:49:28,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:49:28,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:28,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:49:28,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:29,444 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:29,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532934139] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:29,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:29,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2021-05-22 02:49:29,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078538312] [2021-05-22 02:49:29,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-22 02:49:29,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:29,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-22 02:49:29,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:49:29,446 INFO L87 Difference]: Start difference. First operand 7120 states and 23820 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:30,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:30,990 INFO L93 Difference]: Finished difference Result 10976 states and 35019 transitions. [2021-05-22 02:49:30,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-22 02:49:30,991 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:49:30,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:31,007 INFO L225 Difference]: With dead ends: 10976 [2021-05-22 02:49:31,007 INFO L226 Difference]: Without dead ends: 10902 [2021-05-22 02:49:31,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1218.6ms TimeCoverageRelationStatistics Valid=436, Invalid=2756, Unknown=0, NotChecked=0, Total=3192 [2021-05-22 02:49:31,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10902 states. [2021-05-22 02:49:31,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10902 to 7382. [2021-05-22 02:49:31,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7382 states, 7381 states have (on average 3.341959084134941) internal successors, (24667), 7381 states have internal predecessors, (24667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:31,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7382 states to 7382 states and 24667 transitions. [2021-05-22 02:49:31,174 INFO L78 Accepts]: Start accepts. Automaton has 7382 states and 24667 transitions. Word has length 34 [2021-05-22 02:49:31,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:31,174 INFO L482 AbstractCegarLoop]: Abstraction has 7382 states and 24667 transitions. [2021-05-22 02:49:31,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:31,175 INFO L276 IsEmpty]: Start isEmpty. Operand 7382 states and 24667 transitions. [2021-05-22 02:49:31,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:49:31,185 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:31,185 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:31,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:31,389 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:31,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:31,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1609354065, now seen corresponding path program 19 times [2021-05-22 02:49:31,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:31,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101186133] [2021-05-22 02:49:31,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:31,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:31,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101186133] [2021-05-22 02:49:31,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101186133] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:31,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602411145] [2021-05-22 02:49:31,630 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 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 [2021-05-22 02:49:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:31,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:49:31,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:32,251 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:32,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602411145] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:32,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:32,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-05-22 02:49:32,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346681300] [2021-05-22 02:49:32,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:49:32,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:32,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:49:32,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:49:32,253 INFO L87 Difference]: Start difference. First operand 7382 states and 24667 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:35,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:35,472 INFO L93 Difference]: Finished difference Result 14490 states and 46802 transitions. [2021-05-22 02:49:35,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-22 02:49:35,473 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:49:35,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:35,497 INFO L225 Difference]: With dead ends: 14490 [2021-05-22 02:49:35,497 INFO L226 Difference]: Without dead ends: 14422 [2021-05-22 02:49:35,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2698 ImplicationChecksByTransitivity, 2633.6ms TimeCoverageRelationStatistics Valid=1500, Invalid=7430, Unknown=0, NotChecked=0, Total=8930 [2021-05-22 02:49:35,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14422 states. [2021-05-22 02:49:35,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14422 to 7458. [2021-05-22 02:49:35,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7458 states, 7457 states have (on average 3.347995172321309) internal successors, (24966), 7457 states have internal predecessors, (24966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:35,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7458 states to 7458 states and 24966 transitions. [2021-05-22 02:49:35,668 INFO L78 Accepts]: Start accepts. Automaton has 7458 states and 24966 transitions. Word has length 34 [2021-05-22 02:49:35,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:35,668 INFO L482 AbstractCegarLoop]: Abstraction has 7458 states and 24966 transitions. [2021-05-22 02:49:35,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:35,668 INFO L276 IsEmpty]: Start isEmpty. Operand 7458 states and 24966 transitions. [2021-05-22 02:49:35,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:49:35,678 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:35,678 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:35,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-05-22 02:49:35,879 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:35,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:35,879 INFO L82 PathProgramCache]: Analyzing trace with hash -891786065, now seen corresponding path program 20 times [2021-05-22 02:49:35,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:35,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498165734] [2021-05-22 02:49:35,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:36,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:36,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498165734] [2021-05-22 02:49:36,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498165734] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:36,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252390614] [2021-05-22 02:49:36,163 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 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 [2021-05-22 02:49:36,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:49:36,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:36,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:49:36,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:36,776 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:36,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252390614] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:36,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:36,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 34 [2021-05-22 02:49:36,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002776106] [2021-05-22 02:49:36,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:49:36,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:36,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:49:36,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:49:36,778 INFO L87 Difference]: Start difference. First operand 7458 states and 24966 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:40,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:40,237 INFO L93 Difference]: Finished difference Result 16738 states and 53735 transitions. [2021-05-22 02:49:40,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-22 02:49:40,238 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:49:40,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:40,265 INFO L225 Difference]: With dead ends: 16738 [2021-05-22 02:49:40,265 INFO L226 Difference]: Without dead ends: 16649 [2021-05-22 02:49:40,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2794 ImplicationChecksByTransitivity, 2830.5ms TimeCoverageRelationStatistics Valid=1578, Invalid=7352, Unknown=0, NotChecked=0, Total=8930 [2021-05-22 02:49:40,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16649 states. [2021-05-22 02:49:40,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16649 to 7399. [2021-05-22 02:49:40,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7399 states, 7398 states have (on average 3.34279535009462) internal successors, (24730), 7398 states have internal predecessors, (24730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:40,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7399 states to 7399 states and 24730 transitions. [2021-05-22 02:49:40,435 INFO L78 Accepts]: Start accepts. Automaton has 7399 states and 24730 transitions. Word has length 34 [2021-05-22 02:49:40,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:40,435 INFO L482 AbstractCegarLoop]: Abstraction has 7399 states and 24730 transitions. [2021-05-22 02:49:40,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:40,436 INFO L276 IsEmpty]: Start isEmpty. Operand 7399 states and 24730 transitions. [2021-05-22 02:49:40,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:49:40,444 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:40,444 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:40,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:40,647 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:40,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:40,647 INFO L82 PathProgramCache]: Analyzing trace with hash 829796399, now seen corresponding path program 21 times [2021-05-22 02:49:40,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:40,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971073994] [2021-05-22 02:49:40,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:40,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:40,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971073994] [2021-05-22 02:49:40,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971073994] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:40,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480988562] [2021-05-22 02:49:40,877 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-22 02:49:40,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:49:40,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:40,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-22 02:49:40,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:41,429 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:41,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480988562] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:41,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:41,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-05-22 02:49:41,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179024922] [2021-05-22 02:49:41,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:49:41,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:41,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:49:41,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:49:41,430 INFO L87 Difference]: Start difference. First operand 7399 states and 24730 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:44,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:44,865 INFO L93 Difference]: Finished difference Result 11618 states and 37622 transitions. [2021-05-22 02:49:44,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-22 02:49:44,866 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:49:44,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:44,881 INFO L225 Difference]: With dead ends: 11618 [2021-05-22 02:49:44,881 INFO L226 Difference]: Without dead ends: 11538 [2021-05-22 02:49:44,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2216 ImplicationChecksByTransitivity, 2792.5ms TimeCoverageRelationStatistics Valid=1448, Invalid=6562, Unknown=0, NotChecked=0, Total=8010 [2021-05-22 02:49:44,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11538 states. [2021-05-22 02:49:44,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11538 to 7515. [2021-05-22 02:49:44,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7515 states, 7514 states have (on average 3.344423742347618) internal successors, (25130), 7514 states have internal predecessors, (25130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:45,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7515 states to 7515 states and 25130 transitions. [2021-05-22 02:49:45,010 INFO L78 Accepts]: Start accepts. Automaton has 7515 states and 25130 transitions. Word has length 34 [2021-05-22 02:49:45,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:45,010 INFO L482 AbstractCegarLoop]: Abstraction has 7515 states and 25130 transitions. [2021-05-22 02:49:45,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:45,010 INFO L276 IsEmpty]: Start isEmpty. Operand 7515 states and 25130 transitions. [2021-05-22 02:49:45,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:49:45,019 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:45,019 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:45,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-05-22 02:49:45,231 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:45,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:45,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1324004089, now seen corresponding path program 22 times [2021-05-22 02:49:45,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:45,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421100510] [2021-05-22 02:49:45,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:45,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:45,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421100510] [2021-05-22 02:49:45,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421100510] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:45,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610074325] [2021-05-22 02:49:45,450 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 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 [2021-05-22 02:49:45,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:49:45,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:45,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:49:45,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:45,999 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:45,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610074325] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:45,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:45,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-05-22 02:49:46,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531168315] [2021-05-22 02:49:46,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:49:46,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:46,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:49:46,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:49:46,000 INFO L87 Difference]: Start difference. First operand 7515 states and 25130 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:46,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:46,987 INFO L93 Difference]: Finished difference Result 9401 states and 30720 transitions. [2021-05-22 02:49:46,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-22 02:49:46,987 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:49:46,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:47,000 INFO L225 Difference]: With dead ends: 9401 [2021-05-22 02:49:47,000 INFO L226 Difference]: Without dead ends: 9333 [2021-05-22 02:49:47,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 965.4ms TimeCoverageRelationStatistics Valid=387, Invalid=1869, Unknown=0, NotChecked=0, Total=2256 [2021-05-22 02:49:47,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9333 states. [2021-05-22 02:49:47,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9333 to 7545. [2021-05-22 02:49:47,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7545 states, 7544 states have (on average 3.345440084835631) internal successors, (25238), 7544 states have internal predecessors, (25238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:47,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7545 states to 7545 states and 25238 transitions. [2021-05-22 02:49:47,129 INFO L78 Accepts]: Start accepts. Automaton has 7545 states and 25238 transitions. Word has length 34 [2021-05-22 02:49:47,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:47,129 INFO L482 AbstractCegarLoop]: Abstraction has 7545 states and 25238 transitions. [2021-05-22 02:49:47,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:47,130 INFO L276 IsEmpty]: Start isEmpty. Operand 7545 states and 25238 transitions. [2021-05-22 02:49:47,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:49:47,138 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:47,138 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:47,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-05-22 02:49:47,339 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:47,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:47,339 INFO L82 PathProgramCache]: Analyzing trace with hash -402301949, now seen corresponding path program 23 times [2021-05-22 02:49:47,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:47,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756442365] [2021-05-22 02:49:47,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:47,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:47,517 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:47,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:47,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756442365] [2021-05-22 02:49:47,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756442365] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:47,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263214586] [2021-05-22 02:49:47,517 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 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 [2021-05-22 02:49:47,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:49:47,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:47,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:49:47,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:48,048 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:48,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263214586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:48,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:48,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-05-22 02:49:48,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437149929] [2021-05-22 02:49:48,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:49:48,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:48,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:49:48,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:49:48,049 INFO L87 Difference]: Start difference. First operand 7545 states and 25238 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:49,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:49,132 INFO L93 Difference]: Finished difference Result 10842 states and 35698 transitions. [2021-05-22 02:49:49,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-22 02:49:49,132 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:49:49,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:49,149 INFO L225 Difference]: With dead ends: 10842 [2021-05-22 02:49:49,149 INFO L226 Difference]: Without dead ends: 10762 [2021-05-22 02:49:49,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1062.2ms TimeCoverageRelationStatistics Valid=439, Invalid=2111, Unknown=0, NotChecked=0, Total=2550 [2021-05-22 02:49:49,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10762 states. [2021-05-22 02:49:49,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10762 to 7545. [2021-05-22 02:49:49,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7545 states, 7544 states have (on average 3.345440084835631) internal successors, (25238), 7544 states have internal predecessors, (25238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:49,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7545 states to 7545 states and 25238 transitions. [2021-05-22 02:49:49,286 INFO L78 Accepts]: Start accepts. Automaton has 7545 states and 25238 transitions. Word has length 34 [2021-05-22 02:49:49,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:49,286 INFO L482 AbstractCegarLoop]: Abstraction has 7545 states and 25238 transitions. [2021-05-22 02:49:49,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:49,286 INFO L276 IsEmpty]: Start isEmpty. Operand 7545 states and 25238 transitions. [2021-05-22 02:49:49,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:49:49,295 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:49,295 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:49,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:49,496 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:49,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:49,496 INFO L82 PathProgramCache]: Analyzing trace with hash -472411985, now seen corresponding path program 24 times [2021-05-22 02:49:49,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:49,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248238165] [2021-05-22 02:49:49,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:49,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:49,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:49,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248238165] [2021-05-22 02:49:49,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248238165] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:49,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786471658] [2021-05-22 02:49:49,687 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 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 [2021-05-22 02:49:49,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:49:49,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:49,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:49:49,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:50,218 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:50,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786471658] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:50,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:50,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-05-22 02:49:50,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469229201] [2021-05-22 02:49:50,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-22 02:49:50,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:50,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-22 02:49:50,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:49:50,219 INFO L87 Difference]: Start difference. First operand 7545 states and 25238 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:51,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:51,161 INFO L93 Difference]: Finished difference Result 10057 states and 33260 transitions. [2021-05-22 02:49:51,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-22 02:49:51,161 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:49:51,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:51,176 INFO L225 Difference]: With dead ends: 10057 [2021-05-22 02:49:51,177 INFO L226 Difference]: Without dead ends: 9977 [2021-05-22 02:49:51,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 929.2ms TimeCoverageRelationStatistics Valid=426, Invalid=1830, Unknown=0, NotChecked=0, Total=2256 [2021-05-22 02:49:51,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9977 states. [2021-05-22 02:49:51,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9977 to 7549. [2021-05-22 02:49:51,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7549 states, 7548 states have (on average 3.34525702172761) internal successors, (25250), 7548 states have internal predecessors, (25250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:51,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7549 states to 7549 states and 25250 transitions. [2021-05-22 02:49:51,301 INFO L78 Accepts]: Start accepts. Automaton has 7549 states and 25250 transitions. Word has length 34 [2021-05-22 02:49:51,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:51,301 INFO L482 AbstractCegarLoop]: Abstraction has 7549 states and 25250 transitions. [2021-05-22 02:49:51,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:51,301 INFO L276 IsEmpty]: Start isEmpty. Operand 7549 states and 25250 transitions. [2021-05-22 02:49:51,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:49:51,309 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:51,309 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:51,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-05-22 02:49:51,510 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:51,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:51,512 INFO L82 PathProgramCache]: Analyzing trace with hash 290892395, now seen corresponding path program 25 times [2021-05-22 02:49:51,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:51,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928244456] [2021-05-22 02:49:51,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:51,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:51,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928244456] [2021-05-22 02:49:51,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928244456] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:51,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027734637] [2021-05-22 02:49:51,763 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-22 02:49:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:51,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-22 02:49:51,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:52,478 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:52,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027734637] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:52,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:52,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 02:49:52,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281420491] [2021-05-22 02:49:52,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:49:52,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:52,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:49:52,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:49:52,479 INFO L87 Difference]: Start difference. First operand 7549 states and 25250 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:53,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:53,805 INFO L93 Difference]: Finished difference Result 10304 states and 33237 transitions. [2021-05-22 02:49:53,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-22 02:49:53,806 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:49:53,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:53,819 INFO L225 Difference]: With dead ends: 10304 [2021-05-22 02:49:53,819 INFO L226 Difference]: Without dead ends: 10170 [2021-05-22 02:49:53,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1371.4ms TimeCoverageRelationStatistics Valid=588, Invalid=2834, Unknown=0, NotChecked=0, Total=3422 [2021-05-22 02:49:53,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10170 states. [2021-05-22 02:49:53,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10170 to 7672. [2021-05-22 02:49:53,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7672 states, 7671 states have (on average 3.3451961934558727) internal successors, (25661), 7671 states have internal predecessors, (25661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:53,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7672 states to 7672 states and 25661 transitions. [2021-05-22 02:49:53,945 INFO L78 Accepts]: Start accepts. Automaton has 7672 states and 25661 transitions. Word has length 34 [2021-05-22 02:49:53,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:53,945 INFO L482 AbstractCegarLoop]: Abstraction has 7672 states and 25661 transitions. [2021-05-22 02:49:53,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:53,945 INFO L276 IsEmpty]: Start isEmpty. Operand 7672 states and 25661 transitions. [2021-05-22 02:49:53,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:49:53,953 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:53,954 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:54,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:54,166 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:54,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:54,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1008460395, now seen corresponding path program 26 times [2021-05-22 02:49:54,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:54,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286749543] [2021-05-22 02:49:54,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:54,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:54,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286749543] [2021-05-22 02:49:54,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286749543] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:54,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544701678] [2021-05-22 02:49:54,364 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 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 [2021-05-22 02:49:54,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:49:54,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:54,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-22 02:49:54,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:54,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544701678] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:54,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:54,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-05-22 02:49:54,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904551744] [2021-05-22 02:49:54,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:49:54,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:54,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:49:54,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:49:54,895 INFO L87 Difference]: Start difference. First operand 7672 states and 25661 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:56,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:56,568 INFO L93 Difference]: Finished difference Result 13599 states and 43266 transitions. [2021-05-22 02:49:56,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-22 02:49:56,569 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:49:56,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:56,591 INFO L225 Difference]: With dead ends: 13599 [2021-05-22 02:49:56,591 INFO L226 Difference]: Without dead ends: 13421 [2021-05-22 02:49:56,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 1562.5ms TimeCoverageRelationStatistics Valid=814, Invalid=3346, Unknown=0, NotChecked=0, Total=4160 [2021-05-22 02:49:56,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13421 states. [2021-05-22 02:49:56,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13421 to 7674. [2021-05-22 02:49:56,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7674 states, 7673 states have (on average 3.345236543724749) internal successors, (25668), 7673 states have internal predecessors, (25668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:56,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7674 states to 7674 states and 25668 transitions. [2021-05-22 02:49:56,759 INFO L78 Accepts]: Start accepts. Automaton has 7674 states and 25668 transitions. Word has length 34 [2021-05-22 02:49:56,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:56,759 INFO L482 AbstractCegarLoop]: Abstraction has 7674 states and 25668 transitions. [2021-05-22 02:49:56,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:56,759 INFO L276 IsEmpty]: Start isEmpty. Operand 7674 states and 25668 transitions. [2021-05-22 02:49:56,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:49:56,768 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:56,768 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:56,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-05-22 02:49:56,968 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:56,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:56,969 INFO L82 PathProgramCache]: Analyzing trace with hash -810749521, now seen corresponding path program 27 times [2021-05-22 02:49:56,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:56,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533114130] [2021-05-22 02:49:56,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:57,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:57,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533114130] [2021-05-22 02:49:57,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533114130] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:57,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660729142] [2021-05-22 02:49:57,141 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 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 [2021-05-22 02:49:57,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:49:57,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:57,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:49:57,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:57,651 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:57,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660729142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:57,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:57,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-05-22 02:49:57,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868980978] [2021-05-22 02:49:57,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-22 02:49:57,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:57,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-22 02:49:57,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:49:57,652 INFO L87 Difference]: Start difference. First operand 7674 states and 25668 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:58,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:58,591 INFO L93 Difference]: Finished difference Result 10242 states and 33864 transitions. [2021-05-22 02:49:58,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-22 02:49:58,592 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:49:58,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:58,607 INFO L225 Difference]: With dead ends: 10242 [2021-05-22 02:49:58,607 INFO L226 Difference]: Without dead ends: 10162 [2021-05-22 02:49:58,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 925.3ms TimeCoverageRelationStatistics Valid=414, Invalid=1842, Unknown=0, NotChecked=0, Total=2256 [2021-05-22 02:49:58,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10162 states. [2021-05-22 02:49:58,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10162 to 7686. [2021-05-22 02:49:58,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7686 states, 7685 states have (on average 3.34469746258946) internal successors, (25704), 7685 states have internal predecessors, (25704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:58,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7686 states to 7686 states and 25704 transitions. [2021-05-22 02:49:58,744 INFO L78 Accepts]: Start accepts. Automaton has 7686 states and 25704 transitions. Word has length 34 [2021-05-22 02:49:58,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:58,745 INFO L482 AbstractCegarLoop]: Abstraction has 7686 states and 25704 transitions. [2021-05-22 02:49:58,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:58,745 INFO L276 IsEmpty]: Start isEmpty. Operand 7686 states and 25704 transitions. [2021-05-22 02:49:58,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:49:58,754 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:58,754 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:58,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:58,969 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:58,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:58,969 INFO L82 PathProgramCache]: Analyzing trace with hash -2119003857, now seen corresponding path program 28 times [2021-05-22 02:49:58,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:58,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631660485] [2021-05-22 02:49:58,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:59,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:59,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631660485] [2021-05-22 02:49:59,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631660485] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:59,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279100576] [2021-05-22 02:49:59,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:59,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:49:59,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:59,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-22 02:49:59,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:59,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279100576] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:59,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:59,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 02:49:59,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177545781] [2021-05-22 02:49:59,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:49:59,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:59,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:49:59,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:49:59,721 INFO L87 Difference]: Start difference. First operand 7686 states and 25704 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:00,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:00,794 INFO L93 Difference]: Finished difference Result 11237 states and 36295 transitions. [2021-05-22 02:50:00,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-22 02:50:00,794 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:50:00,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:00,810 INFO L225 Difference]: With dead ends: 11237 [2021-05-22 02:50:00,811 INFO L226 Difference]: Without dead ends: 11176 [2021-05-22 02:50:00,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 1145.5ms TimeCoverageRelationStatistics Valid=474, Invalid=2496, Unknown=0, NotChecked=0, Total=2970 [2021-05-22 02:50:00,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11176 states. [2021-05-22 02:50:00,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11176 to 7730. [2021-05-22 02:50:00,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7730 states, 7729 states have (on average 3.3486867641350755) internal successors, (25882), 7729 states have internal predecessors, (25882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:00,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7730 states to 7730 states and 25882 transitions. [2021-05-22 02:50:00,950 INFO L78 Accepts]: Start accepts. Automaton has 7730 states and 25882 transitions. Word has length 34 [2021-05-22 02:50:00,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:00,950 INFO L482 AbstractCegarLoop]: Abstraction has 7730 states and 25882 transitions. [2021-05-22 02:50:00,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:00,950 INFO L276 IsEmpty]: Start isEmpty. Operand 7730 states and 25882 transitions. [2021-05-22 02:50:00,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:50:00,958 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:00,958 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:01,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-05-22 02:50:01,160 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:01,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:01,160 INFO L82 PathProgramCache]: Analyzing trace with hash 148717615, now seen corresponding path program 29 times [2021-05-22 02:50:01,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:01,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617363033] [2021-05-22 02:50:01,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:01,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:01,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617363033] [2021-05-22 02:50:01,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617363033] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:01,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689122530] [2021-05-22 02:50:01,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:01,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:50:01,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:01,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-22 02:50:01,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:01,875 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:01,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689122530] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:01,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:01,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-05-22 02:50:01,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881979127] [2021-05-22 02:50:01,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-22 02:50:01,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:01,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-22 02:50:01,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:50:01,876 INFO L87 Difference]: Start difference. First operand 7730 states and 25882 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:04,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:04,254 INFO L93 Difference]: Finished difference Result 15447 states and 50397 transitions. [2021-05-22 02:50:04,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-22 02:50:04,255 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:50:04,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:04,281 INFO L225 Difference]: With dead ends: 15447 [2021-05-22 02:50:04,281 INFO L226 Difference]: Without dead ends: 15367 [2021-05-22 02:50:04,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1735 ImplicationChecksByTransitivity, 2063.5ms TimeCoverageRelationStatistics Valid=1019, Invalid=5143, Unknown=0, NotChecked=0, Total=6162 [2021-05-22 02:50:04,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15367 states. [2021-05-22 02:50:04,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15367 to 7685. [2021-05-22 02:50:04,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7685 states, 7684 states have (on average 3.345002602811036) internal successors, (25703), 7684 states have internal predecessors, (25703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:04,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7685 states to 7685 states and 25703 transitions. [2021-05-22 02:50:04,460 INFO L78 Accepts]: Start accepts. Automaton has 7685 states and 25703 transitions. Word has length 34 [2021-05-22 02:50:04,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:04,460 INFO L482 AbstractCegarLoop]: Abstraction has 7685 states and 25703 transitions. [2021-05-22 02:50:04,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:04,460 INFO L276 IsEmpty]: Start isEmpty. Operand 7685 states and 25703 transitions. [2021-05-22 02:50:04,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:50:04,469 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:04,469 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:04,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:04,676 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:04,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:04,676 INFO L82 PathProgramCache]: Analyzing trace with hash 873755055, now seen corresponding path program 30 times [2021-05-22 02:50:04,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:04,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284703794] [2021-05-22 02:50:04,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:04,878 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:04,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:04,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284703794] [2021-05-22 02:50:04,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284703794] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:04,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163800556] [2021-05-22 02:50:04,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:04,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:50:04,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:04,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:50:04,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:05,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163800556] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:05,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:05,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-05-22 02:50:05,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35244848] [2021-05-22 02:50:05,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-22 02:50:05,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:05,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-22 02:50:05,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:50:05,386 INFO L87 Difference]: Start difference. First operand 7685 states and 25703 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:06,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:06,378 INFO L93 Difference]: Finished difference Result 10155 states and 33589 transitions. [2021-05-22 02:50:06,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-22 02:50:06,379 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:50:06,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:06,393 INFO L225 Difference]: With dead ends: 10155 [2021-05-22 02:50:06,393 INFO L226 Difference]: Without dead ends: 10075 [2021-05-22 02:50:06,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 1012.2ms TimeCoverageRelationStatistics Valid=417, Invalid=1745, Unknown=0, NotChecked=0, Total=2162 [2021-05-22 02:50:06,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10075 states. [2021-05-22 02:50:06,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10075 to 7685. [2021-05-22 02:50:06,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7685 states, 7684 states have (on average 3.345002602811036) internal successors, (25703), 7684 states have internal predecessors, (25703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:06,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7685 states to 7685 states and 25703 transitions. [2021-05-22 02:50:06,522 INFO L78 Accepts]: Start accepts. Automaton has 7685 states and 25703 transitions. Word has length 34 [2021-05-22 02:50:06,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:06,522 INFO L482 AbstractCegarLoop]: Abstraction has 7685 states and 25703 transitions. [2021-05-22 02:50:06,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:06,522 INFO L276 IsEmpty]: Start isEmpty. Operand 7685 states and 25703 transitions. [2021-05-22 02:50:06,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:50:06,531 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:06,531 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:06,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-05-22 02:50:06,745 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:06,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:06,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1810559919, now seen corresponding path program 31 times [2021-05-22 02:50:06,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:06,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586305369] [2021-05-22 02:50:06,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:06,919 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:06,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:06,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586305369] [2021-05-22 02:50:06,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586305369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:06,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417788275] [2021-05-22 02:50:06,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:06,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:06,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:50:06,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:07,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417788275] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:07,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:07,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-05-22 02:50:07,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170388529] [2021-05-22 02:50:07,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:50:07,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:07,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:50:07,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:50:07,493 INFO L87 Difference]: Start difference. First operand 7685 states and 25703 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:08,087 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-05-22 02:50:08,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:08,779 INFO L93 Difference]: Finished difference Result 9851 states and 32529 transitions. [2021-05-22 02:50:08,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-22 02:50:08,780 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:50:08,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:08,795 INFO L225 Difference]: With dead ends: 9851 [2021-05-22 02:50:08,795 INFO L226 Difference]: Without dead ends: 9771 [2021-05-22 02:50:08,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1351.0ms TimeCoverageRelationStatistics Valid=420, Invalid=1836, Unknown=0, NotChecked=0, Total=2256 [2021-05-22 02:50:08,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9771 states. [2021-05-22 02:50:08,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9771 to 7685. [2021-05-22 02:50:08,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7685 states, 7684 states have (on average 3.345002602811036) internal successors, (25703), 7684 states have internal predecessors, (25703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:08,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7685 states to 7685 states and 25703 transitions. [2021-05-22 02:50:08,917 INFO L78 Accepts]: Start accepts. Automaton has 7685 states and 25703 transitions. Word has length 34 [2021-05-22 02:50:08,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:08,917 INFO L482 AbstractCegarLoop]: Abstraction has 7685 states and 25703 transitions. [2021-05-22 02:50:08,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:08,918 INFO L276 IsEmpty]: Start isEmpty. Operand 7685 states and 25703 transitions. [2021-05-22 02:50:08,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:50:08,926 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:08,926 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:09,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:09,133 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:09,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:09,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1645184831, now seen corresponding path program 32 times [2021-05-22 02:50:09,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:09,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747351404] [2021-05-22 02:50:09,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:09,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:09,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:09,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747351404] [2021-05-22 02:50:09,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747351404] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:09,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544918258] [2021-05-22 02:50:09,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:09,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:50:09,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:09,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-22 02:50:09,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:09,967 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:09,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544918258] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:09,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:09,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-05-22 02:50:09,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864996166] [2021-05-22 02:50:09,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:50:09,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:09,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:50:09,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:50:09,968 INFO L87 Difference]: Start difference. First operand 7685 states and 25703 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:12,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:12,328 INFO L93 Difference]: Finished difference Result 12991 states and 42326 transitions. [2021-05-22 02:50:12,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-22 02:50:12,329 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:50:12,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:12,350 INFO L225 Difference]: With dead ends: 12991 [2021-05-22 02:50:12,350 INFO L226 Difference]: Without dead ends: 12911 [2021-05-22 02:50:12,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 1943.1ms TimeCoverageRelationStatistics Valid=863, Invalid=4539, Unknown=0, NotChecked=0, Total=5402 [2021-05-22 02:50:12,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12911 states. [2021-05-22 02:50:12,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12911 to 7733. [2021-05-22 02:50:12,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7733 states, 7732 states have (on average 3.3441541645111226) internal successors, (25857), 7732 states have internal predecessors, (25857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:12,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7733 states to 7733 states and 25857 transitions. [2021-05-22 02:50:12,499 INFO L78 Accepts]: Start accepts. Automaton has 7733 states and 25857 transitions. Word has length 34 [2021-05-22 02:50:12,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:12,501 INFO L482 AbstractCegarLoop]: Abstraction has 7733 states and 25857 transitions. [2021-05-22 02:50:12,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:12,501 INFO L276 IsEmpty]: Start isEmpty. Operand 7733 states and 25857 transitions. [2021-05-22 02:50:12,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:50:12,510 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:12,510 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:12,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-05-22 02:50:12,710 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:12,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:12,711 INFO L82 PathProgramCache]: Analyzing trace with hash -508615657, now seen corresponding path program 33 times [2021-05-22 02:50:12,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:12,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718502594] [2021-05-22 02:50:12,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:12,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:12,899 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:12,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:12,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718502594] [2021-05-22 02:50:12,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718502594] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:12,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581209801] [2021-05-22 02:50:12,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:12,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:50:12,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:12,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:50:12,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:13,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581209801] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:13,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:13,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-05-22 02:50:13,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940008567] [2021-05-22 02:50:13,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-22 02:50:13,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:13,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-22 02:50:13,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:50:13,436 INFO L87 Difference]: Start difference. First operand 7733 states and 25857 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:14,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:14,907 INFO L93 Difference]: Finished difference Result 10389 states and 33911 transitions. [2021-05-22 02:50:14,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-22 02:50:14,907 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:50:14,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:14,924 INFO L225 Difference]: With dead ends: 10389 [2021-05-22 02:50:14,924 INFO L226 Difference]: Without dead ends: 10315 [2021-05-22 02:50:14,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1193.0ms TimeCoverageRelationStatistics Valid=437, Invalid=2425, Unknown=0, NotChecked=0, Total=2862 [2021-05-22 02:50:14,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10315 states. [2021-05-22 02:50:15,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10315 to 7770. [2021-05-22 02:50:15,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7770 states, 7769 states have (on average 3.3457330415754925) internal successors, (25993), 7769 states have internal predecessors, (25993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:15,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7770 states to 7770 states and 25993 transitions. [2021-05-22 02:50:15,102 INFO L78 Accepts]: Start accepts. Automaton has 7770 states and 25993 transitions. Word has length 34 [2021-05-22 02:50:15,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:15,102 INFO L482 AbstractCegarLoop]: Abstraction has 7770 states and 25993 transitions. [2021-05-22 02:50:15,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:15,102 INFO L276 IsEmpty]: Start isEmpty. Operand 7770 states and 25993 transitions. [2021-05-22 02:50:15,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:50:15,110 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:15,110 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:15,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-05-22 02:50:15,311 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:15,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:15,311 INFO L82 PathProgramCache]: Analyzing trace with hash 342976447, now seen corresponding path program 34 times [2021-05-22 02:50:15,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:15,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076632290] [2021-05-22 02:50:15,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:15,503 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:15,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:15,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076632290] [2021-05-22 02:50:15,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076632290] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:15,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031567192] [2021-05-22 02:50:15,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:15,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:50:15,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:15,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:50:15,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:16,008 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:16,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031567192] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:16,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:16,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-05-22 02:50:16,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82353446] [2021-05-22 02:50:16,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:50:16,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:16,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:50:16,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:50:16,009 INFO L87 Difference]: Start difference. First operand 7770 states and 25993 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:17,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:17,265 INFO L93 Difference]: Finished difference Result 11540 states and 38141 transitions. [2021-05-22 02:50:17,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-22 02:50:17,265 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:50:17,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:17,284 INFO L225 Difference]: With dead ends: 11540 [2021-05-22 02:50:17,284 INFO L226 Difference]: Without dead ends: 11460 [2021-05-22 02:50:17,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1041.2ms TimeCoverageRelationStatistics Valid=447, Invalid=2205, Unknown=0, NotChecked=0, Total=2652 [2021-05-22 02:50:17,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11460 states. [2021-05-22 02:50:17,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11460 to 7774. [2021-05-22 02:50:17,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7774 states, 7773 states have (on average 3.3455551267206998) internal successors, (26005), 7773 states have internal predecessors, (26005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:17,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7774 states to 7774 states and 26005 transitions. [2021-05-22 02:50:17,425 INFO L78 Accepts]: Start accepts. Automaton has 7774 states and 26005 transitions. Word has length 34 [2021-05-22 02:50:17,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:17,425 INFO L482 AbstractCegarLoop]: Abstraction has 7774 states and 26005 transitions. [2021-05-22 02:50:17,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:17,425 INFO L276 IsEmpty]: Start isEmpty. Operand 7774 states and 26005 transitions. [2021-05-22 02:50:17,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:50:17,433 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:17,433 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:17,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:17,634 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:17,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:17,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1106280827, now seen corresponding path program 35 times [2021-05-22 02:50:17,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:17,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419863680] [2021-05-22 02:50:17,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:17,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:17,886 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:17,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:17,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419863680] [2021-05-22 02:50:17,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419863680] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:17,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309620542] [2021-05-22 02:50:17,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:17,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:50:17,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:17,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-22 02:50:17,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:18,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309620542] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:18,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:18,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 02:50:18,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976227549] [2021-05-22 02:50:18,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:50:18,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:18,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:50:18,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:50:18,500 INFO L87 Difference]: Start difference. First operand 7774 states and 26005 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:20,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:20,091 INFO L93 Difference]: Finished difference Result 11043 states and 35560 transitions. [2021-05-22 02:50:20,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-22 02:50:20,091 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:50:20,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:20,105 INFO L225 Difference]: With dead ends: 11043 [2021-05-22 02:50:20,106 INFO L226 Difference]: Without dead ends: 10909 [2021-05-22 02:50:20,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 1473.0ms TimeCoverageRelationStatistics Valid=597, Invalid=3063, Unknown=0, NotChecked=0, Total=3660 [2021-05-22 02:50:20,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10909 states. [2021-05-22 02:50:20,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10909 to 7897. [2021-05-22 02:50:20,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7897 states, 7896 states have (on average 3.3456180344478215) internal successors, (26417), 7896 states have internal predecessors, (26417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:20,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7897 states to 7897 states and 26417 transitions. [2021-05-22 02:50:20,239 INFO L78 Accepts]: Start accepts. Automaton has 7897 states and 26417 transitions. Word has length 34 [2021-05-22 02:50:20,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:20,239 INFO L482 AbstractCegarLoop]: Abstraction has 7897 states and 26417 transitions. [2021-05-22 02:50:20,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:20,239 INFO L276 IsEmpty]: Start isEmpty. Operand 7897 states and 26417 transitions. [2021-05-22 02:50:20,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:50:20,248 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:20,248 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:20,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-05-22 02:50:20,449 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:20,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:20,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1823848827, now seen corresponding path program 36 times [2021-05-22 02:50:20,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:20,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196579685] [2021-05-22 02:50:20,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:20,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:20,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196579685] [2021-05-22 02:50:20,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196579685] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:20,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475849285] [2021-05-22 02:50:20,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:20,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:50:20,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:20,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-22 02:50:20,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:21,125 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:21,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475849285] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:21,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:21,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-05-22 02:50:21,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489873470] [2021-05-22 02:50:21,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:50:21,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:21,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:50:21,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:50:21,126 INFO L87 Difference]: Start difference. First operand 7897 states and 26417 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:22,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:22,890 INFO L93 Difference]: Finished difference Result 14412 states and 45857 transitions. [2021-05-22 02:50:22,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-22 02:50:22,890 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:50:22,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:22,912 INFO L225 Difference]: With dead ends: 14412 [2021-05-22 02:50:22,912 INFO L226 Difference]: Without dead ends: 14234 [2021-05-22 02:50:22,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 1545.0ms TimeCoverageRelationStatistics Valid=810, Invalid=3480, Unknown=0, NotChecked=0, Total=4290 [2021-05-22 02:50:22,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14234 states. [2021-05-22 02:50:23,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14234 to 7884. [2021-05-22 02:50:23,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7884 states, 7883 states have (on average 3.344792591652924) internal successors, (26367), 7883 states have internal predecessors, (26367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:23,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7884 states to 7884 states and 26367 transitions. [2021-05-22 02:50:23,085 INFO L78 Accepts]: Start accepts. Automaton has 7884 states and 26367 transitions. Word has length 34 [2021-05-22 02:50:23,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:23,085 INFO L482 AbstractCegarLoop]: Abstraction has 7884 states and 26367 transitions. [2021-05-22 02:50:23,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:23,086 INFO L276 IsEmpty]: Start isEmpty. Operand 7884 states and 26367 transitions. [2021-05-22 02:50:23,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:50:23,095 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:23,095 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:23,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:23,301 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:23,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:23,301 INFO L82 PathProgramCache]: Analyzing trace with hash 4638911, now seen corresponding path program 37 times [2021-05-22 02:50:23,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:23,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236376992] [2021-05-22 02:50:23,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:23,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:23,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:23,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236376992] [2021-05-22 02:50:23,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236376992] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:23,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127638435] [2021-05-22 02:50:23,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:23,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:23,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:50:23,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:24,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127638435] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:24,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:24,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-05-22 02:50:24,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341303673] [2021-05-22 02:50:24,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:50:24,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:24,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:50:24,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:50:24,017 INFO L87 Difference]: Start difference. First operand 7884 states and 26367 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:25,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:25,142 INFO L93 Difference]: Finished difference Result 11462 states and 37893 transitions. [2021-05-22 02:50:25,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-22 02:50:25,145 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:50:25,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:25,162 INFO L225 Difference]: With dead ends: 11462 [2021-05-22 02:50:25,162 INFO L226 Difference]: Without dead ends: 11382 [2021-05-22 02:50:25,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1025.0ms TimeCoverageRelationStatistics Valid=421, Invalid=2129, Unknown=0, NotChecked=0, Total=2550 [2021-05-22 02:50:25,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11382 states. [2021-05-22 02:50:25,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11382 to 7876. [2021-05-22 02:50:25,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7876 states, 7875 states have (on average 3.345142857142857) internal successors, (26343), 7875 states have internal predecessors, (26343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:25,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7876 states to 7876 states and 26343 transitions. [2021-05-22 02:50:25,301 INFO L78 Accepts]: Start accepts. Automaton has 7876 states and 26343 transitions. Word has length 34 [2021-05-22 02:50:25,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:25,301 INFO L482 AbstractCegarLoop]: Abstraction has 7876 states and 26343 transitions. [2021-05-22 02:50:25,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:25,301 INFO L276 IsEmpty]: Start isEmpty. Operand 7876 states and 26343 transitions. [2021-05-22 02:50:25,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:50:25,310 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:25,310 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:25,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2021-05-22 02:50:25,510 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:25,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:25,511 INFO L82 PathProgramCache]: Analyzing trace with hash 809080239, now seen corresponding path program 38 times [2021-05-22 02:50:25,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:25,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226205413] [2021-05-22 02:50:25,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:25,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:25,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:25,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226205413] [2021-05-22 02:50:25,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226205413] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:25,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414315282] [2021-05-22 02:50:25,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:50:25,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:50:25,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:25,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-22 02:50:25,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:26,240 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:26,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414315282] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:26,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:26,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-05-22 02:50:26,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031940136] [2021-05-22 02:50:26,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:50:26,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:26,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:50:26,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:50:26,241 INFO L87 Difference]: Start difference. First operand 7876 states and 26343 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:28,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:28,746 INFO L93 Difference]: Finished difference Result 11431 states and 37218 transitions. [2021-05-22 02:50:28,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-22 02:50:28,746 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:50:28,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:28,763 INFO L225 Difference]: With dead ends: 11431 [2021-05-22 02:50:28,763 INFO L226 Difference]: Without dead ends: 11364 [2021-05-22 02:50:28,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1488 ImplicationChecksByTransitivity, 2112.5ms TimeCoverageRelationStatistics Valid=876, Invalid=4674, Unknown=0, NotChecked=0, Total=5550 [2021-05-22 02:50:28,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11364 states. [2021-05-22 02:50:28,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11364 to 8088. [2021-05-22 02:50:28,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8088 states, 8087 states have (on average 3.344503524174601) internal successors, (27047), 8087 states have internal predecessors, (27047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:28,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8088 states to 8088 states and 27047 transitions. [2021-05-22 02:50:28,924 INFO L78 Accepts]: Start accepts. Automaton has 8088 states and 27047 transitions. Word has length 34 [2021-05-22 02:50:28,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:28,925 INFO L482 AbstractCegarLoop]: Abstraction has 8088 states and 27047 transitions. [2021-05-22 02:50:28,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:28,925 INFO L276 IsEmpty]: Start isEmpty. Operand 8088 states and 27047 transitions. [2021-05-22 02:50:28,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:50:28,934 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:28,934 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:29,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-05-22 02:50:29,135 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:29,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:29,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1344720249, now seen corresponding path program 39 times [2021-05-22 02:50:29,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:29,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667254346] [2021-05-22 02:50:29,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:29,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:29,343 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:29,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:29,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667254346] [2021-05-22 02:50:29,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667254346] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:29,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813631682] [2021-05-22 02:50:29,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:29,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:50:29,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:29,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:50:29,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:29,821 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:29,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813631682] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:29,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:29,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-05-22 02:50:29,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20989968] [2021-05-22 02:50:29,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-22 02:50:29,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:29,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-22 02:50:29,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:50:29,822 INFO L87 Difference]: Start difference. First operand 8088 states and 27047 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:31,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:31,656 INFO L93 Difference]: Finished difference Result 11398 states and 37361 transitions. [2021-05-22 02:50:31,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-22 02:50:31,657 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:50:31,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:31,674 INFO L225 Difference]: With dead ends: 11398 [2021-05-22 02:50:31,674 INFO L226 Difference]: Without dead ends: 11324 [2021-05-22 02:50:31,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1593.9ms TimeCoverageRelationStatistics Valid=610, Invalid=3172, Unknown=0, NotChecked=0, Total=3782 [2021-05-22 02:50:31,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11324 states. [2021-05-22 02:50:31,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11324 to 8124. [2021-05-22 02:50:31,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8124 states, 8123 states have (on average 3.345931306167672) internal successors, (27179), 8123 states have internal predecessors, (27179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:31,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8124 states to 8124 states and 27179 transitions. [2021-05-22 02:50:31,814 INFO L78 Accepts]: Start accepts. Automaton has 8124 states and 27179 transitions. Word has length 34 [2021-05-22 02:50:31,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:31,814 INFO L482 AbstractCegarLoop]: Abstraction has 8124 states and 27179 transitions. [2021-05-22 02:50:31,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:31,814 INFO L276 IsEmpty]: Start isEmpty. Operand 8124 states and 27179 transitions. [2021-05-22 02:50:31,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:50:31,823 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:31,823 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:32,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:32,023 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:32,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:32,024 INFO L82 PathProgramCache]: Analyzing trace with hash -493128145, now seen corresponding path program 40 times [2021-05-22 02:50:32,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:32,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826552356] [2021-05-22 02:50:32,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:32,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:32,232 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:32,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:32,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826552356] [2021-05-22 02:50:32,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826552356] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:32,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926157121] [2021-05-22 02:50:32,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:32,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:50:32,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:32,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:50:32,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:32,692 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:32,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926157121] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:32,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:32,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-05-22 02:50:32,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512056231] [2021-05-22 02:50:32,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:50:32,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:32,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:50:32,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:50:32,693 INFO L87 Difference]: Start difference. First operand 8124 states and 27179 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:33,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:33,926 INFO L93 Difference]: Finished difference Result 12758 states and 41655 transitions. [2021-05-22 02:50:33,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-22 02:50:33,926 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:50:33,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:33,947 INFO L225 Difference]: With dead ends: 12758 [2021-05-22 02:50:33,947 INFO L226 Difference]: Without dead ends: 12678 [2021-05-22 02:50:33,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1145.7ms TimeCoverageRelationStatistics Valid=499, Invalid=2153, Unknown=0, NotChecked=0, Total=2652 [2021-05-22 02:50:33,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12678 states. [2021-05-22 02:50:34,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12678 to 8126. [2021-05-22 02:50:34,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8126 states, 8125 states have (on average 3.345846153846154) internal successors, (27185), 8125 states have internal predecessors, (27185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:34,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8126 states to 8126 states and 27185 transitions. [2021-05-22 02:50:34,095 INFO L78 Accepts]: Start accepts. Automaton has 8126 states and 27185 transitions. Word has length 34 [2021-05-22 02:50:34,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:34,095 INFO L482 AbstractCegarLoop]: Abstraction has 8126 states and 27185 transitions. [2021-05-22 02:50:34,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:34,095 INFO L276 IsEmpty]: Start isEmpty. Operand 8126 states and 27185 transitions. [2021-05-22 02:50:34,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:50:34,104 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:34,104 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:34,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-05-22 02:50:34,305 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:34,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:34,305 INFO L82 PathProgramCache]: Analyzing trace with hash 270176235, now seen corresponding path program 41 times [2021-05-22 02:50:34,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:34,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716610520] [2021-05-22 02:50:34,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:34,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:34,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716610520] [2021-05-22 02:50:34,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716610520] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:34,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239405006] [2021-05-22 02:50:34,534 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:34,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:50:34,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:34,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-22 02:50:34,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:35,116 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:35,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239405006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:35,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:35,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 02:50:35,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105919301] [2021-05-22 02:50:35,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:50:35,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:35,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:50:35,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:50:35,117 INFO L87 Difference]: Start difference. First operand 8126 states and 27185 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:37,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:37,413 INFO L93 Difference]: Finished difference Result 13402 states and 43284 transitions. [2021-05-22 02:50:37,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-22 02:50:37,414 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:50:37,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:37,438 INFO L225 Difference]: With dead ends: 13402 [2021-05-22 02:50:37,438 INFO L226 Difference]: Without dead ends: 13334 [2021-05-22 02:50:37,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 1962.0ms TimeCoverageRelationStatistics Valid=958, Invalid=4444, Unknown=0, NotChecked=0, Total=5402 [2021-05-22 02:50:37,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13334 states. [2021-05-22 02:50:37,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13334 to 8624. [2021-05-22 02:50:37,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8624 states, 8623 states have (on average 3.339325060883683) internal successors, (28795), 8623 states have internal predecessors, (28795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:37,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8624 states to 8624 states and 28795 transitions. [2021-05-22 02:50:37,612 INFO L78 Accepts]: Start accepts. Automaton has 8624 states and 28795 transitions. Word has length 34 [2021-05-22 02:50:37,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:37,612 INFO L482 AbstractCegarLoop]: Abstraction has 8624 states and 28795 transitions. [2021-05-22 02:50:37,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:37,612 INFO L276 IsEmpty]: Start isEmpty. Operand 8624 states and 28795 transitions. [2021-05-22 02:50:37,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:50:37,622 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:37,622 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:37,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:37,822 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:37,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:37,823 INFO L82 PathProgramCache]: Analyzing trace with hash 987744235, now seen corresponding path program 42 times [2021-05-22 02:50:37,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:37,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487851805] [2021-05-22 02:50:37,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:37,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:38,074 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:38,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:38,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487851805] [2021-05-22 02:50:38,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487851805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:38,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846219813] [2021-05-22 02:50:38,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:38,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:50:38,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:38,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-22 02:50:38,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:38,627 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:38,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846219813] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:38,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:38,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-05-22 02:50:38,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922081334] [2021-05-22 02:50:38,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:50:38,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:38,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:50:38,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:50:38,628 INFO L87 Difference]: Start difference. First operand 8624 states and 28795 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:40,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:40,134 INFO L93 Difference]: Finished difference Result 16986 states and 55205 transitions. [2021-05-22 02:50:40,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-22 02:50:40,134 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:50:40,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:40,161 INFO L225 Difference]: With dead ends: 16986 [2021-05-22 02:50:40,161 INFO L226 Difference]: Without dead ends: 16888 [2021-05-22 02:50:40,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1424.2ms TimeCoverageRelationStatistics Valid=612, Invalid=2580, Unknown=0, NotChecked=0, Total=3192 [2021-05-22 02:50:40,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16888 states. [2021-05-22 02:50:40,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16888 to 8622. [2021-05-22 02:50:40,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8622 states, 8621 states have (on average 3.3391717898155666) internal successors, (28787), 8621 states have internal predecessors, (28787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:40,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8622 states to 8622 states and 28787 transitions. [2021-05-22 02:50:40,355 INFO L78 Accepts]: Start accepts. Automaton has 8622 states and 28787 transitions. Word has length 34 [2021-05-22 02:50:40,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:40,355 INFO L482 AbstractCegarLoop]: Abstraction has 8622 states and 28787 transitions. [2021-05-22 02:50:40,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:40,355 INFO L276 IsEmpty]: Start isEmpty. Operand 8622 states and 28787 transitions. [2021-05-22 02:50:40,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:50:40,365 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:40,365 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:40,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2021-05-22 02:50:40,581 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:40,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:40,581 INFO L82 PathProgramCache]: Analyzing trace with hash -831465681, now seen corresponding path program 43 times [2021-05-22 02:50:40,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:40,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126958884] [2021-05-22 02:50:40,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:40,803 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:40,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:40,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126958884] [2021-05-22 02:50:40,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126958884] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:40,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191891960] [2021-05-22 02:50:40,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:50:40,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:40,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:50:40,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:41,284 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:41,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191891960] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:41,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:41,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-05-22 02:50:41,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418162903] [2021-05-22 02:50:41,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:50:41,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:41,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:50:41,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:50:41,285 INFO L87 Difference]: Start difference. First operand 8622 states and 28787 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:42,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:42,609 INFO L93 Difference]: Finished difference Result 14190 states and 46183 transitions. [2021-05-22 02:50:42,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-22 02:50:42,610 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:50:42,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:42,633 INFO L225 Difference]: With dead ends: 14190 [2021-05-22 02:50:42,633 INFO L226 Difference]: Without dead ends: 14110 [2021-05-22 02:50:42,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1197.7ms TimeCoverageRelationStatistics Valid=507, Invalid=2249, Unknown=0, NotChecked=0, Total=2756 [2021-05-22 02:50:42,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14110 states. [2021-05-22 02:50:42,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14110 to 8630. [2021-05-22 02:50:42,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8630 states, 8629 states have (on average 3.3388573415227722) internal successors, (28811), 8629 states have internal predecessors, (28811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:42,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8630 states to 8630 states and 28811 transitions. [2021-05-22 02:50:42,804 INFO L78 Accepts]: Start accepts. Automaton has 8630 states and 28811 transitions. Word has length 34 [2021-05-22 02:50:42,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:42,804 INFO L482 AbstractCegarLoop]: Abstraction has 8630 states and 28811 transitions. [2021-05-22 02:50:42,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:42,804 INFO L276 IsEmpty]: Start isEmpty. Operand 8630 states and 28811 transitions. [2021-05-22 02:50:42,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:50:42,813 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:42,814 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:43,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:43,015 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:43,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:43,015 INFO L82 PathProgramCache]: Analyzing trace with hash -743901889, now seen corresponding path program 44 times [2021-05-22 02:50:43,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:43,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621977544] [2021-05-22 02:50:43,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:43,218 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:43,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:43,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621977544] [2021-05-22 02:50:43,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621977544] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:43,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822255738] [2021-05-22 02:50:43,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:50:43,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:50:43,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:43,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-22 02:50:43,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:43,734 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:43,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822255738] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:43,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:43,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-05-22 02:50:43,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236799673] [2021-05-22 02:50:43,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-22 02:50:43,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:43,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-22 02:50:43,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:50:43,735 INFO L87 Difference]: Start difference. First operand 8630 states and 28811 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:46,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:46,385 INFO L93 Difference]: Finished difference Result 15771 states and 50789 transitions. [2021-05-22 02:50:46,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-22 02:50:46,385 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:50:46,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:46,410 INFO L225 Difference]: With dead ends: 15771 [2021-05-22 02:50:46,410 INFO L226 Difference]: Without dead ends: 15691 [2021-05-22 02:50:46,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 2204.9ms TimeCoverageRelationStatistics Valid=899, Invalid=4801, Unknown=0, NotChecked=0, Total=5700 [2021-05-22 02:50:46,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15691 states. [2021-05-22 02:50:46,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15691 to 9020. [2021-05-22 02:50:46,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9020 states, 9019 states have (on average 3.351036700299368) internal successors, (30223), 9019 states have internal predecessors, (30223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:46,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9020 states to 9020 states and 30223 transitions. [2021-05-22 02:50:46,603 INFO L78 Accepts]: Start accepts. Automaton has 9020 states and 30223 transitions. Word has length 34 [2021-05-22 02:50:46,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:46,603 INFO L482 AbstractCegarLoop]: Abstraction has 9020 states and 30223 transitions. [2021-05-22 02:50:46,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:46,603 INFO L276 IsEmpty]: Start isEmpty. Operand 9020 states and 30223 transitions. [2021-05-22 02:50:46,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:50:46,613 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:46,613 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:46,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:46,813 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:46,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:46,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1130059071, now seen corresponding path program 45 times [2021-05-22 02:50:46,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:46,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042034840] [2021-05-22 02:50:46,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:46,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:47,027 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:47,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:47,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042034840] [2021-05-22 02:50:47,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042034840] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:47,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690984171] [2021-05-22 02:50:47,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:47,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:50:47,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:47,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:50:47,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:47,493 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:47,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690984171] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:47,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:47,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-05-22 02:50:47,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622565451] [2021-05-22 02:50:47,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-22 02:50:47,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:47,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-22 02:50:47,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:50:47,495 INFO L87 Difference]: Start difference. First operand 9020 states and 30223 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:49,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:49,270 INFO L93 Difference]: Finished difference Result 15861 states and 52080 transitions. [2021-05-22 02:50:49,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-22 02:50:49,270 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:50:49,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:49,295 INFO L225 Difference]: With dead ends: 15861 [2021-05-22 02:50:49,295 INFO L226 Difference]: Without dead ends: 15781 [2021-05-22 02:50:49,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 1432.7ms TimeCoverageRelationStatistics Valid=665, Invalid=2757, Unknown=0, NotChecked=0, Total=3422 [2021-05-22 02:50:49,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15781 states. [2021-05-22 02:50:49,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15781 to 9108. [2021-05-22 02:50:49,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9108 states, 9107 states have (on average 3.3542330075765894) internal successors, (30547), 9107 states have internal predecessors, (30547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:49,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9108 states to 9108 states and 30547 transitions. [2021-05-22 02:50:49,488 INFO L78 Accepts]: Start accepts. Automaton has 9108 states and 30547 transitions. Word has length 34 [2021-05-22 02:50:49,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:49,488 INFO L482 AbstractCegarLoop]: Abstraction has 9108 states and 30547 transitions. [2021-05-22 02:50:49,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:49,488 INFO L276 IsEmpty]: Start isEmpty. Operand 9108 states and 30547 transitions. [2021-05-22 02:50:49,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:50:49,498 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:49,498 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:49,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-05-22 02:50:49,699 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:49,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:49,699 INFO L82 PathProgramCache]: Analyzing trace with hash 306804211, now seen corresponding path program 46 times [2021-05-22 02:50:49,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:49,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210771547] [2021-05-22 02:50:49,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:49,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:49,881 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:49,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:49,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210771547] [2021-05-22 02:50:49,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210771547] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:49,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665652060] [2021-05-22 02:50:49,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:49,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:50:49,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:49,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-22 02:50:49,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:50,427 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:50,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665652060] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:50,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:50,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 02:50:50,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612915273] [2021-05-22 02:50:50,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:50:50,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:50,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:50:50,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:50:50,428 INFO L87 Difference]: Start difference. First operand 9108 states and 30547 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:51,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:51,578 INFO L93 Difference]: Finished difference Result 14291 states and 46571 transitions. [2021-05-22 02:50:51,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-22 02:50:51,578 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:50:51,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:51,600 INFO L225 Difference]: With dead ends: 14291 [2021-05-22 02:50:51,600 INFO L226 Difference]: Without dead ends: 14230 [2021-05-22 02:50:51,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1105.4ms TimeCoverageRelationStatistics Valid=464, Invalid=2398, Unknown=0, NotChecked=0, Total=2862 [2021-05-22 02:50:51,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14230 states. [2021-05-22 02:50:51,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14230 to 9186. [2021-05-22 02:50:51,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9186 states, 9185 states have (on average 3.3555797495917257) internal successors, (30821), 9185 states have internal predecessors, (30821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:51,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9186 states to 9186 states and 30821 transitions. [2021-05-22 02:50:51,772 INFO L78 Accepts]: Start accepts. Automaton has 9186 states and 30821 transitions. Word has length 34 [2021-05-22 02:50:51,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:51,772 INFO L482 AbstractCegarLoop]: Abstraction has 9186 states and 30821 transitions. [2021-05-22 02:50:51,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:51,772 INFO L276 IsEmpty]: Start isEmpty. Operand 9186 states and 30821 transitions. [2021-05-22 02:50:51,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:50:51,782 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:51,782 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:51,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:51,983 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:51,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:51,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1720441613, now seen corresponding path program 47 times [2021-05-22 02:50:51,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:51,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232916661] [2021-05-22 02:50:51,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:52,199 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:52,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:52,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232916661] [2021-05-22 02:50:52,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232916661] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:52,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951303486] [2021-05-22 02:50:52,199 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:52,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:50:52,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:52,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-22 02:50:52,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:52,691 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:52,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951303486] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:52,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:52,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-05-22 02:50:52,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072891666] [2021-05-22 02:50:52,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-22 02:50:52,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:52,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-22 02:50:52,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:50:52,692 INFO L87 Difference]: Start difference. First operand 9186 states and 30821 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:55,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:55,007 INFO L93 Difference]: Finished difference Result 19194 states and 63283 transitions. [2021-05-22 02:50:55,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-22 02:50:55,007 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:50:55,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:55,037 INFO L225 Difference]: With dead ends: 19194 [2021-05-22 02:50:55,037 INFO L226 Difference]: Without dead ends: 19114 [2021-05-22 02:50:55,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 1797.0ms TimeCoverageRelationStatistics Valid=915, Invalid=4635, Unknown=0, NotChecked=0, Total=5550 [2021-05-22 02:50:55,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19114 states. [2021-05-22 02:50:55,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19114 to 9171. [2021-05-22 02:50:55,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9171 states, 9170 states have (on average 3.353435114503817) internal successors, (30751), 9170 states have internal predecessors, (30751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:55,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9171 states to 9171 states and 30751 transitions. [2021-05-22 02:50:55,239 INFO L78 Accepts]: Start accepts. Automaton has 9171 states and 30751 transitions. Word has length 34 [2021-05-22 02:50:55,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:55,239 INFO L482 AbstractCegarLoop]: Abstraction has 9171 states and 30751 transitions. [2021-05-22 02:50:55,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:55,239 INFO L276 IsEmpty]: Start isEmpty. Operand 9171 states and 30751 transitions. [2021-05-22 02:50:55,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:50:55,249 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:55,249 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:55,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-05-22 02:50:55,449 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:55,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:55,450 INFO L82 PathProgramCache]: Analyzing trace with hash -995404173, now seen corresponding path program 48 times [2021-05-22 02:50:55,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:55,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037460603] [2021-05-22 02:50:55,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:55,627 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:55,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:55,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037460603] [2021-05-22 02:50:55,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037460603] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:55,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13810146] [2021-05-22 02:50:55,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:55,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:50:55,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:50:55,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:50:55,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:56,090 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:56,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13810146] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:56,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:56,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-05-22 02:50:56,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822235414] [2021-05-22 02:50:56,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-22 02:50:56,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:56,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-22 02:50:56,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:50:56,091 INFO L87 Difference]: Start difference. First operand 9171 states and 30751 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:57,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:57,242 INFO L93 Difference]: Finished difference Result 12967 states and 43188 transitions. [2021-05-22 02:50:57,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-22 02:50:57,242 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:50:57,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:57,264 INFO L225 Difference]: With dead ends: 12967 [2021-05-22 02:50:57,264 INFO L226 Difference]: Without dead ends: 12887 [2021-05-22 02:50:57,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 987.7ms TimeCoverageRelationStatistics Valid=468, Invalid=1982, Unknown=0, NotChecked=0, Total=2450 [2021-05-22 02:50:57,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12887 states. [2021-05-22 02:50:57,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12887 to 9179. [2021-05-22 02:50:57,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9179 states, 9178 states have (on average 3.3531270429287425) internal successors, (30775), 9178 states have internal predecessors, (30775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:57,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9179 states to 9179 states and 30775 transitions. [2021-05-22 02:50:57,479 INFO L78 Accepts]: Start accepts. Automaton has 9179 states and 30775 transitions. Word has length 34 [2021-05-22 02:50:57,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:57,479 INFO L482 AbstractCegarLoop]: Abstraction has 9179 states and 30775 transitions. [2021-05-22 02:50:57,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:57,479 INFO L276 IsEmpty]: Start isEmpty. Operand 9179 states and 30775 transitions. [2021-05-22 02:50:57,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:50:57,490 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:57,490 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:57,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:57,690 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:57,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:57,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1333741709, now seen corresponding path program 49 times [2021-05-22 02:50:57,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:57,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83614846] [2021-05-22 02:50:57,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:57,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:57,868 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:57,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:50:57,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83614846] [2021-05-22 02:50:57,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83614846] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:57,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735757434] [2021-05-22 02:50:57,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:50:57,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:50:57,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:50:57,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:50:58,342 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:50:58,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735757434] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:50:58,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:50:58,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-05-22 02:50:58,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448046421] [2021-05-22 02:50:58,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:50:58,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:50:58,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:50:58,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:50:58,343 INFO L87 Difference]: Start difference. First operand 9179 states and 30775 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:59,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:50:59,517 INFO L93 Difference]: Finished difference Result 12929 states and 43085 transitions. [2021-05-22 02:50:59,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-22 02:50:59,517 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:50:59,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:50:59,538 INFO L225 Difference]: With dead ends: 12929 [2021-05-22 02:50:59,538 INFO L226 Difference]: Without dead ends: 12849 [2021-05-22 02:50:59,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1017.8ms TimeCoverageRelationStatistics Valid=473, Invalid=2077, Unknown=0, NotChecked=0, Total=2550 [2021-05-22 02:50:59,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12849 states. [2021-05-22 02:50:59,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12849 to 9181. [2021-05-22 02:50:59,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9181 states, 9180 states have (on average 3.353050108932462) internal successors, (30781), 9180 states have internal predecessors, (30781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:59,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9181 states to 9181 states and 30781 transitions. [2021-05-22 02:50:59,693 INFO L78 Accepts]: Start accepts. Automaton has 9181 states and 30781 transitions. Word has length 34 [2021-05-22 02:50:59,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:50:59,693 INFO L482 AbstractCegarLoop]: Abstraction has 9181 states and 30781 transitions. [2021-05-22 02:50:59,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:50:59,694 INFO L276 IsEmpty]: Start isEmpty. Operand 9181 states and 30781 transitions. [2021-05-22 02:50:59,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:50:59,703 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:50:59,703 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:50:59,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-05-22 02:50:59,904 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:50:59,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:50:59,904 INFO L82 PathProgramCache]: Analyzing trace with hash -58599309, now seen corresponding path program 50 times [2021-05-22 02:50:59,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:50:59,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579909573] [2021-05-22 02:50:59,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:50:59,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:00,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:00,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579909573] [2021-05-22 02:51:00,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579909573] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:00,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799760280] [2021-05-22 02:51:00,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:00,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:51:00,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:00,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:51:00,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:00,556 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:00,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799760280] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:00,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:00,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-05-22 02:51:00,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694427359] [2021-05-22 02:51:00,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-22 02:51:00,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:00,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-22 02:51:00,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:51:00,557 INFO L87 Difference]: Start difference. First operand 9181 states and 30781 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:01,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:01,724 INFO L93 Difference]: Finished difference Result 12817 states and 42681 transitions. [2021-05-22 02:51:01,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-22 02:51:01,725 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:51:01,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:01,745 INFO L225 Difference]: With dead ends: 12817 [2021-05-22 02:51:01,745 INFO L226 Difference]: Without dead ends: 12737 [2021-05-22 02:51:01,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1044.8ms TimeCoverageRelationStatistics Valid=494, Invalid=2056, Unknown=0, NotChecked=0, Total=2550 [2021-05-22 02:51:01,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12737 states. [2021-05-22 02:51:01,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12737 to 9109. [2021-05-22 02:51:01,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9109 states, 9108 states have (on average 3.352986385595081) internal successors, (30539), 9108 states have internal predecessors, (30539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:01,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9109 states to 9109 states and 30539 transitions. [2021-05-22 02:51:01,895 INFO L78 Accepts]: Start accepts. Automaton has 9109 states and 30539 transitions. Word has length 34 [2021-05-22 02:51:01,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:01,895 INFO L482 AbstractCegarLoop]: Abstraction has 9109 states and 30539 transitions. [2021-05-22 02:51:01,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:01,895 INFO L276 IsEmpty]: Start isEmpty. Operand 9109 states and 30539 transitions. [2021-05-22 02:51:01,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:51:01,905 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:01,905 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:02,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-05-22 02:51:02,105 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:02,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:02,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1116590339, now seen corresponding path program 51 times [2021-05-22 02:51:02,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:02,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990803292] [2021-05-22 02:51:02,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:02,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:02,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990803292] [2021-05-22 02:51:02,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990803292] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:02,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583011082] [2021-05-22 02:51:02,290 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:02,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:51:02,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:02,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-22 02:51:02,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:02,770 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:02,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583011082] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:02,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:02,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-05-22 02:51:02,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993393102] [2021-05-22 02:51:02,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:51:02,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:02,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:51:02,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:51:02,772 INFO L87 Difference]: Start difference. First operand 9109 states and 30539 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:04,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:04,497 INFO L93 Difference]: Finished difference Result 16652 states and 54193 transitions. [2021-05-22 02:51:04,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-22 02:51:04,498 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:51:04,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:04,523 INFO L225 Difference]: With dead ends: 16652 [2021-05-22 02:51:04,523 INFO L226 Difference]: Without dead ends: 16578 [2021-05-22 02:51:04,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1300.5ms TimeCoverageRelationStatistics Valid=527, Invalid=3013, Unknown=0, NotChecked=0, Total=3540 [2021-05-22 02:51:04,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16578 states. [2021-05-22 02:51:04,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16578 to 9297. [2021-05-22 02:51:04,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9297 states, 9296 states have (on average 3.3570352839931155) internal successors, (31207), 9296 states have internal predecessors, (31207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:04,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9297 states to 9297 states and 31207 transitions. [2021-05-22 02:51:04,724 INFO L78 Accepts]: Start accepts. Automaton has 9297 states and 31207 transitions. Word has length 34 [2021-05-22 02:51:04,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:04,724 INFO L482 AbstractCegarLoop]: Abstraction has 9297 states and 31207 transitions. [2021-05-22 02:51:04,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:04,724 INFO L276 IsEmpty]: Start isEmpty. Operand 9297 states and 31207 transitions. [2021-05-22 02:51:04,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:51:04,735 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:04,735 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:04,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:04,936 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:04,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:04,936 INFO L82 PathProgramCache]: Analyzing trace with hash -115508009, now seen corresponding path program 52 times [2021-05-22 02:51:04,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:04,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438019811] [2021-05-22 02:51:04,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:05,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:05,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438019811] [2021-05-22 02:51:05,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438019811] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:05,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652545646] [2021-05-22 02:51:05,112 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:05,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:51:05,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:05,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:51:05,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:05,584 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:05,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652545646] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:05,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:05,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-05-22 02:51:05,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055853921] [2021-05-22 02:51:05,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:51:05,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:05,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:51:05,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:51:05,585 INFO L87 Difference]: Start difference. First operand 9297 states and 31207 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:07,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:07,263 INFO L93 Difference]: Finished difference Result 16129 states and 53347 transitions. [2021-05-22 02:51:07,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-22 02:51:07,264 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:51:07,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:07,292 INFO L225 Difference]: With dead ends: 16129 [2021-05-22 02:51:07,292 INFO L226 Difference]: Without dead ends: 16049 [2021-05-22 02:51:07,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 1191.4ms TimeCoverageRelationStatistics Valid=561, Invalid=2745, Unknown=0, NotChecked=0, Total=3306 [2021-05-22 02:51:07,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16049 states. [2021-05-22 02:51:07,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16049 to 9301. [2021-05-22 02:51:07,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9301 states, 9300 states have (on average 3.3568817204301076) internal successors, (31219), 9300 states have internal predecessors, (31219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:07,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9301 states to 9301 states and 31219 transitions. [2021-05-22 02:51:07,495 INFO L78 Accepts]: Start accepts. Automaton has 9301 states and 31219 transitions. Word has length 34 [2021-05-22 02:51:07,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:07,495 INFO L482 AbstractCegarLoop]: Abstraction has 9301 states and 31219 transitions. [2021-05-22 02:51:07,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:07,495 INFO L276 IsEmpty]: Start isEmpty. Operand 9301 states and 31219 transitions. [2021-05-22 02:51:07,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:51:07,506 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:07,506 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:07,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-05-22 02:51:07,722 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:07,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:07,723 INFO L82 PathProgramCache]: Analyzing trace with hash -185618045, now seen corresponding path program 53 times [2021-05-22 02:51:07,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:07,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276466620] [2021-05-22 02:51:07,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:07,898 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:07,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:07,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276466620] [2021-05-22 02:51:07,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276466620] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:07,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132158750] [2021-05-22 02:51:07,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:07,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:51:07,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:07,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:51:07,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:08,388 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:08,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132158750] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:08,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:08,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-05-22 02:51:08,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044894254] [2021-05-22 02:51:08,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:51:08,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:08,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:51:08,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:51:08,389 INFO L87 Difference]: Start difference. First operand 9301 states and 31219 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:09,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:09,671 INFO L93 Difference]: Finished difference Result 15319 states and 50920 transitions. [2021-05-22 02:51:09,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-22 02:51:09,671 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:51:09,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:09,695 INFO L225 Difference]: With dead ends: 15319 [2021-05-22 02:51:09,695 INFO L226 Difference]: Without dead ends: 15239 [2021-05-22 02:51:09,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1162.6ms TimeCoverageRelationStatistics Valid=524, Invalid=2446, Unknown=0, NotChecked=0, Total=2970 [2021-05-22 02:51:09,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15239 states. [2021-05-22 02:51:09,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15239 to 9301. [2021-05-22 02:51:09,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9301 states, 9300 states have (on average 3.3568817204301076) internal successors, (31219), 9300 states have internal predecessors, (31219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:09,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9301 states to 9301 states and 31219 transitions. [2021-05-22 02:51:09,869 INFO L78 Accepts]: Start accepts. Automaton has 9301 states and 31219 transitions. Word has length 34 [2021-05-22 02:51:09,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:09,870 INFO L482 AbstractCegarLoop]: Abstraction has 9301 states and 31219 transitions. [2021-05-22 02:51:09,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:09,870 INFO L276 IsEmpty]: Start isEmpty. Operand 9301 states and 31219 transitions. [2021-05-22 02:51:09,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:51:09,879 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:09,880 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:10,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:10,080 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:10,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:10,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1295254335, now seen corresponding path program 54 times [2021-05-22 02:51:10,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:10,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547007910] [2021-05-22 02:51:10,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:10,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:10,324 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:10,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:10,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547007910] [2021-05-22 02:51:10,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547007910] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:10,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833829437] [2021-05-22 02:51:10,325 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:10,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:51:10,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:10,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-22 02:51:10,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:10,784 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:10,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833829437] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:10,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:10,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-05-22 02:51:10,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676578568] [2021-05-22 02:51:10,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:51:10,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:10,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:51:10,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:51:10,785 INFO L87 Difference]: Start difference. First operand 9301 states and 31219 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:12,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:12,452 INFO L93 Difference]: Finished difference Result 19306 states and 63066 transitions. [2021-05-22 02:51:12,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-22 02:51:12,453 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:51:12,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:12,484 INFO L225 Difference]: With dead ends: 19306 [2021-05-22 02:51:12,484 INFO L226 Difference]: Without dead ends: 19208 [2021-05-22 02:51:12,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1356.1ms TimeCoverageRelationStatistics Valid=713, Invalid=3069, Unknown=0, NotChecked=0, Total=3782 [2021-05-22 02:51:12,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19208 states. [2021-05-22 02:51:12,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19208 to 9199. [2021-05-22 02:51:12,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9199 states, 9198 states have (on average 3.352576647097195) internal successors, (30837), 9198 states have internal predecessors, (30837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:12,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9199 states to 9199 states and 30837 transitions. [2021-05-22 02:51:12,695 INFO L78 Accepts]: Start accepts. Automaton has 9199 states and 30837 transitions. Word has length 34 [2021-05-22 02:51:12,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:12,695 INFO L482 AbstractCegarLoop]: Abstraction has 9199 states and 30837 transitions. [2021-05-22 02:51:12,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:12,695 INFO L276 IsEmpty]: Start isEmpty. Operand 9199 states and 30837 transitions. [2021-05-22 02:51:12,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:51:12,705 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:12,705 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:12,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-05-22 02:51:12,905 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:12,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:12,906 INFO L82 PathProgramCache]: Analyzing trace with hash -523955581, now seen corresponding path program 55 times [2021-05-22 02:51:12,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:12,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329192912] [2021-05-22 02:51:12,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:13,085 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:13,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:13,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329192912] [2021-05-22 02:51:13,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329192912] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:13,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564411480] [2021-05-22 02:51:13,085 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:13,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:13,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:51:13,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:13,616 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:13,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564411480] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:13,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:13,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-05-22 02:51:13,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612180440] [2021-05-22 02:51:13,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:51:13,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:13,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:51:13,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:51:13,617 INFO L87 Difference]: Start difference. First operand 9199 states and 30837 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:15,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:15,065 INFO L93 Difference]: Finished difference Result 14838 states and 49288 transitions. [2021-05-22 02:51:15,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-22 02:51:15,066 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:51:15,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:15,089 INFO L225 Difference]: With dead ends: 14838 [2021-05-22 02:51:15,089 INFO L226 Difference]: Without dead ends: 14758 [2021-05-22 02:51:15,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1195.2ms TimeCoverageRelationStatistics Valid=542, Invalid=2538, Unknown=0, NotChecked=0, Total=3080 [2021-05-22 02:51:15,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14758 states. [2021-05-22 02:51:15,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14758 to 9199. [2021-05-22 02:51:15,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9199 states, 9198 states have (on average 3.352576647097195) internal successors, (30837), 9198 states have internal predecessors, (30837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:15,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9199 states to 9199 states and 30837 transitions. [2021-05-22 02:51:15,260 INFO L78 Accepts]: Start accepts. Automaton has 9199 states and 30837 transitions. Word has length 34 [2021-05-22 02:51:15,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:15,261 INFO L482 AbstractCegarLoop]: Abstraction has 9199 states and 30837 transitions. [2021-05-22 02:51:15,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:15,261 INFO L276 IsEmpty]: Start isEmpty. Operand 9199 states and 30837 transitions. [2021-05-22 02:51:15,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-22 02:51:15,271 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:15,271 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:15,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-05-22 02:51:15,471 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:15,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:15,472 INFO L82 PathProgramCache]: Analyzing trace with hash -88435649, now seen corresponding path program 56 times [2021-05-22 02:51:15,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:15,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573184364] [2021-05-22 02:51:15,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:15,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:15,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:15,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573184364] [2021-05-22 02:51:15,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573184364] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:15,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208588238] [2021-05-22 02:51:15,647 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:15,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:51:15,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:15,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:51:15,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:16,112 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:16,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208588238] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:16,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:16,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-05-22 02:51:16,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813591019] [2021-05-22 02:51:16,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-22 02:51:16,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:16,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-22 02:51:16,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:51:16,113 INFO L87 Difference]: Start difference. First operand 9199 states and 30837 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:17,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:17,679 INFO L93 Difference]: Finished difference Result 19992 states and 66552 transitions. [2021-05-22 02:51:17,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-22 02:51:17,679 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-22 02:51:17,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:17,713 INFO L225 Difference]: With dead ends: 19992 [2021-05-22 02:51:17,713 INFO L226 Difference]: Without dead ends: 19912 [2021-05-22 02:51:17,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1299.6ms TimeCoverageRelationStatistics Valid=625, Invalid=3035, Unknown=0, NotChecked=0, Total=3660 [2021-05-22 02:51:17,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19912 states. [2021-05-22 02:51:17,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19912 to 9055. [2021-05-22 02:51:17,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9055 states, 9054 states have (on average 3.3537662911420365) internal successors, (30365), 9054 states have internal predecessors, (30365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:17,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9055 states to 9055 states and 30365 transitions. [2021-05-22 02:51:17,966 INFO L78 Accepts]: Start accepts. Automaton has 9055 states and 30365 transitions. Word has length 34 [2021-05-22 02:51:17,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:17,967 INFO L482 AbstractCegarLoop]: Abstraction has 9055 states and 30365 transitions. [2021-05-22 02:51:17,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:17,967 INFO L276 IsEmpty]: Start isEmpty. Operand 9055 states and 30365 transitions. [2021-05-22 02:51:17,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:51:17,977 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:17,977 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:18,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:18,192 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:18,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:18,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1561626779, now seen corresponding path program 57 times [2021-05-22 02:51:18,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:18,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848674673] [2021-05-22 02:51:18,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:18,521 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:51:18,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:18,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848674673] [2021-05-22 02:51:18,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848674673] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:18,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125229443] [2021-05-22 02:51:18,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:18,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:51:18,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:18,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:51:18,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:19,191 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:19,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125229443] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:19,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:19,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-05-22 02:51:19,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389277724] [2021-05-22 02:51:19,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:51:19,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:19,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:51:19,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:51:19,192 INFO L87 Difference]: Start difference. First operand 9055 states and 30365 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:21,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:21,227 INFO L93 Difference]: Finished difference Result 12463 states and 40678 transitions. [2021-05-22 02:51:21,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-22 02:51:21,227 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:51:21,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:21,246 INFO L225 Difference]: With dead ends: 12463 [2021-05-22 02:51:21,246 INFO L226 Difference]: Without dead ends: 12343 [2021-05-22 02:51:21,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 1779.8ms TimeCoverageRelationStatistics Valid=578, Invalid=3082, Unknown=0, NotChecked=0, Total=3660 [2021-05-22 02:51:21,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12343 states. [2021-05-22 02:51:21,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12343 to 9161. [2021-05-22 02:51:21,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9161 states, 9160 states have (on average 3.3498908296943233) internal successors, (30685), 9160 states have internal predecessors, (30685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:21,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9161 states to 9161 states and 30685 transitions. [2021-05-22 02:51:21,409 INFO L78 Accepts]: Start accepts. Automaton has 9161 states and 30685 transitions. Word has length 36 [2021-05-22 02:51:21,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:21,409 INFO L482 AbstractCegarLoop]: Abstraction has 9161 states and 30685 transitions. [2021-05-22 02:51:21,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:21,409 INFO L276 IsEmpty]: Start isEmpty. Operand 9161 states and 30685 transitions. [2021-05-22 02:51:21,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:51:21,419 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:21,419 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:21,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-05-22 02:51:21,621 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:21,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:21,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1895413349, now seen corresponding path program 58 times [2021-05-22 02:51:21,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:21,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130656495] [2021-05-22 02:51:21,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:21,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:21,914 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:51:21,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:21,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130656495] [2021-05-22 02:51:21,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130656495] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:21,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492922380] [2021-05-22 02:51:21,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:21,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:51:21,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:21,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:51:21,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:22,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492922380] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:22,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:22,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-05-22 02:51:22,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212065759] [2021-05-22 02:51:22,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-22 02:51:22,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:22,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-22 02:51:22,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:51:22,654 INFO L87 Difference]: Start difference. First operand 9161 states and 30685 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:24,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:24,069 INFO L93 Difference]: Finished difference Result 9978 states and 32867 transitions. [2021-05-22 02:51:24,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-22 02:51:24,069 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:51:24,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:24,084 INFO L225 Difference]: With dead ends: 9978 [2021-05-22 02:51:24,084 INFO L226 Difference]: Without dead ends: 9870 [2021-05-22 02:51:24,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 1572.3ms TimeCoverageRelationStatistics Valid=600, Invalid=2706, Unknown=0, NotChecked=0, Total=3306 [2021-05-22 02:51:24,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9870 states. [2021-05-22 02:51:24,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9870 to 9245. [2021-05-22 02:51:24,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9245 states, 9244 states have (on average 3.3443314582431847) internal successors, (30915), 9244 states have internal predecessors, (30915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:24,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9245 states to 9245 states and 30915 transitions. [2021-05-22 02:51:24,229 INFO L78 Accepts]: Start accepts. Automaton has 9245 states and 30915 transitions. Word has length 36 [2021-05-22 02:51:24,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:24,229 INFO L482 AbstractCegarLoop]: Abstraction has 9245 states and 30915 transitions. [2021-05-22 02:51:24,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:24,229 INFO L276 IsEmpty]: Start isEmpty. Operand 9245 states and 30915 transitions. [2021-05-22 02:51:24,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:51:24,239 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:24,239 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:24,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:24,440 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:24,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:24,440 INFO L82 PathProgramCache]: Analyzing trace with hash 834811493, now seen corresponding path program 59 times [2021-05-22 02:51:24,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:24,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476218727] [2021-05-22 02:51:24,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:24,729 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:51:24,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:24,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476218727] [2021-05-22 02:51:24,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476218727] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:24,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197970404] [2021-05-22 02:51:24,729 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:24,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:51:24,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:24,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-22 02:51:24,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:25,325 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:25,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197970404] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:25,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:25,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-05-22 02:51:25,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525296988] [2021-05-22 02:51:25,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:51:25,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:25,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:51:25,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:51:25,326 INFO L87 Difference]: Start difference. First operand 9245 states and 30915 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:26,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:26,522 INFO L93 Difference]: Finished difference Result 11017 states and 36070 transitions. [2021-05-22 02:51:26,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-22 02:51:26,522 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:51:26,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:26,538 INFO L225 Difference]: With dead ends: 11017 [2021-05-22 02:51:26,538 INFO L226 Difference]: Without dead ends: 10963 [2021-05-22 02:51:26,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1430.8ms TimeCoverageRelationStatistics Valid=519, Invalid=2451, Unknown=0, NotChecked=0, Total=2970 [2021-05-22 02:51:26,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10963 states. [2021-05-22 02:51:26,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10963 to 9313. [2021-05-22 02:51:26,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9313 states, 9312 states have (on average 3.3385953608247423) internal successors, (31089), 9312 states have internal predecessors, (31089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:26,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9313 states to 9313 states and 31089 transitions. [2021-05-22 02:51:26,681 INFO L78 Accepts]: Start accepts. Automaton has 9313 states and 31089 transitions. Word has length 36 [2021-05-22 02:51:26,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:26,681 INFO L482 AbstractCegarLoop]: Abstraction has 9313 states and 31089 transitions. [2021-05-22 02:51:26,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:26,681 INFO L276 IsEmpty]: Start isEmpty. Operand 9313 states and 31089 transitions. [2021-05-22 02:51:26,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:51:26,691 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:26,691 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:26,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable533 [2021-05-22 02:51:26,892 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:26,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:26,893 INFO L82 PathProgramCache]: Analyzing trace with hash -3115675, now seen corresponding path program 60 times [2021-05-22 02:51:26,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:26,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310383972] [2021-05-22 02:51:26,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:26,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:51:27,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:27,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310383972] [2021-05-22 02:51:27,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310383972] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:27,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094421992] [2021-05-22 02:51:27,120 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:27,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:51:27,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:27,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:51:27,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:27,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094421992] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:27,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:27,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 02:51:27,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570013355] [2021-05-22 02:51:27,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:51:27,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:27,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:51:27,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:51:27,643 INFO L87 Difference]: Start difference. First operand 9313 states and 31089 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:29,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:29,684 INFO L93 Difference]: Finished difference Result 10574 states and 34626 transitions. [2021-05-22 02:51:29,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-22 02:51:29,684 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:51:29,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:29,698 INFO L225 Difference]: With dead ends: 10574 [2021-05-22 02:51:29,698 INFO L226 Difference]: Without dead ends: 10293 [2021-05-22 02:51:29,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 1680.6ms TimeCoverageRelationStatistics Valid=556, Invalid=3604, Unknown=0, NotChecked=0, Total=4160 [2021-05-22 02:51:29,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10293 states. [2021-05-22 02:51:29,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10293 to 9327. [2021-05-22 02:51:29,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9327 states, 9326 states have (on average 3.3374437057688184) internal successors, (31125), 9326 states have internal predecessors, (31125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:29,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9327 states to 9327 states and 31125 transitions. [2021-05-22 02:51:29,838 INFO L78 Accepts]: Start accepts. Automaton has 9327 states and 31125 transitions. Word has length 36 [2021-05-22 02:51:29,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:29,838 INFO L482 AbstractCegarLoop]: Abstraction has 9327 states and 31125 transitions. [2021-05-22 02:51:29,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:29,838 INFO L276 IsEmpty]: Start isEmpty. Operand 9327 states and 31125 transitions. [2021-05-22 02:51:29,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:51:29,849 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:29,849 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:30,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:30,049 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:30,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:30,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1558016609, now seen corresponding path program 61 times [2021-05-22 02:51:30,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:30,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993356960] [2021-05-22 02:51:30,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:30,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:30,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:30,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993356960] [2021-05-22 02:51:30,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993356960] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:30,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494916593] [2021-05-22 02:51:30,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:30,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:30,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:51:30,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:31,092 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:31,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494916593] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:31,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:31,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-05-22 02:51:31,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782648042] [2021-05-22 02:51:31,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-22 02:51:31,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:31,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-22 02:51:31,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1172, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:51:31,093 INFO L87 Difference]: Start difference. First operand 9327 states and 31125 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:32,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:32,722 INFO L93 Difference]: Finished difference Result 10820 states and 35312 transitions. [2021-05-22 02:51:32,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-22 02:51:32,723 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:51:32,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:32,738 INFO L225 Difference]: With dead ends: 10820 [2021-05-22 02:51:32,739 INFO L226 Difference]: Without dead ends: 10712 [2021-05-22 02:51:32,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 1793.0ms TimeCoverageRelationStatistics Valid=755, Invalid=3535, Unknown=0, NotChecked=0, Total=4290 [2021-05-22 02:51:32,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10712 states. [2021-05-22 02:51:32,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10712 to 9391. [2021-05-22 02:51:32,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9391 states, 9390 states have (on average 3.3338658146964857) internal successors, (31305), 9390 states have internal predecessors, (31305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:32,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9391 states to 9391 states and 31305 transitions. [2021-05-22 02:51:32,912 INFO L78 Accepts]: Start accepts. Automaton has 9391 states and 31305 transitions. Word has length 36 [2021-05-22 02:51:32,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:32,912 INFO L482 AbstractCegarLoop]: Abstraction has 9391 states and 31305 transitions. [2021-05-22 02:51:32,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:32,912 INFO L276 IsEmpty]: Start isEmpty. Operand 9391 states and 31305 transitions. [2021-05-22 02:51:32,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:51:32,923 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:32,923 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:33,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-05-22 02:51:33,124 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:33,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:33,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1212016539, now seen corresponding path program 62 times [2021-05-22 02:51:33,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:33,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479335450] [2021-05-22 02:51:33,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:33,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:33,425 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:33,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:33,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479335450] [2021-05-22 02:51:33,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479335450] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:33,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762807726] [2021-05-22 02:51:33,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:33,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:51:33,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:33,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:51:33,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:34,131 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:34,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762807726] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:34,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:34,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-05-22 02:51:34,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781921250] [2021-05-22 02:51:34,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:51:34,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:34,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:51:34,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:51:34,133 INFO L87 Difference]: Start difference. First operand 9391 states and 31305 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:37,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:37,811 INFO L93 Difference]: Finished difference Result 15459 states and 49301 transitions. [2021-05-22 02:51:37,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-22 02:51:37,811 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:51:37,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:37,835 INFO L225 Difference]: With dead ends: 15459 [2021-05-22 02:51:37,835 INFO L226 Difference]: Without dead ends: 15318 [2021-05-22 02:51:37,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2474 ImplicationChecksByTransitivity, 3014.9ms TimeCoverageRelationStatistics Valid=1225, Invalid=6607, Unknown=0, NotChecked=0, Total=7832 [2021-05-22 02:51:37,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15318 states. [2021-05-22 02:51:37,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15318 to 9405. [2021-05-22 02:51:37,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9405 states, 9404 states have (on average 3.336771586558911) internal successors, (31379), 9404 states have internal predecessors, (31379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:37,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9405 states to 9405 states and 31379 transitions. [2021-05-22 02:51:37,998 INFO L78 Accepts]: Start accepts. Automaton has 9405 states and 31379 transitions. Word has length 36 [2021-05-22 02:51:37,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:37,998 INFO L482 AbstractCegarLoop]: Abstraction has 9405 states and 31379 transitions. [2021-05-22 02:51:37,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:37,999 INFO L276 IsEmpty]: Start isEmpty. Operand 9405 states and 31379 transitions. [2021-05-22 02:51:38,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:51:38,009 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:38,009 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:38,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-05-22 02:51:38,213 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:38,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:38,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1194156385, now seen corresponding path program 63 times [2021-05-22 02:51:38,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:38,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085217463] [2021-05-22 02:51:38,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:38,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:38,496 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:38,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:38,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085217463] [2021-05-22 02:51:38,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085217463] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:38,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639342036] [2021-05-22 02:51:38,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:38,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:51:38,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:38,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:51:38,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:39,103 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:39,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639342036] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:39,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:39,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-05-22 02:51:39,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672555196] [2021-05-22 02:51:39,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:51:39,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:39,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:51:39,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1000, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:51:39,104 INFO L87 Difference]: Start difference. First operand 9405 states and 31379 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:42,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:42,158 INFO L93 Difference]: Finished difference Result 15173 states and 48503 transitions. [2021-05-22 02:51:42,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-22 02:51:42,158 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:51:42,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:42,180 INFO L225 Difference]: With dead ends: 15173 [2021-05-22 02:51:42,180 INFO L226 Difference]: Without dead ends: 15059 [2021-05-22 02:51:42,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1709 ImplicationChecksByTransitivity, 2255.5ms TimeCoverageRelationStatistics Valid=822, Invalid=5184, Unknown=0, NotChecked=0, Total=6006 [2021-05-22 02:51:42,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15059 states. [2021-05-22 02:51:42,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15059 to 9471. [2021-05-22 02:51:42,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9471 states, 9470 states have (on average 3.3367476240760294) internal successors, (31599), 9470 states have internal predecessors, (31599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:42,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9471 states to 9471 states and 31599 transitions. [2021-05-22 02:51:42,352 INFO L78 Accepts]: Start accepts. Automaton has 9471 states and 31599 transitions. Word has length 36 [2021-05-22 02:51:42,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:42,352 INFO L482 AbstractCegarLoop]: Abstraction has 9471 states and 31599 transitions. [2021-05-22 02:51:42,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:42,352 INFO L276 IsEmpty]: Start isEmpty. Operand 9471 states and 31599 transitions. [2021-05-22 02:51:42,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:51:42,363 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:42,363 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:42,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:42,564 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:42,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:42,564 INFO L82 PathProgramCache]: Analyzing trace with hash 359968101, now seen corresponding path program 64 times [2021-05-22 02:51:42,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:42,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619639619] [2021-05-22 02:51:42,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:42,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:42,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619639619] [2021-05-22 02:51:42,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619639619] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:42,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953992630] [2021-05-22 02:51:42,810 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:42,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:51:42,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:42,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:51:42,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:43,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953992630] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:43,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:43,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-05-22 02:51:43,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762478015] [2021-05-22 02:51:43,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-22 02:51:43,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:43,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-22 02:51:43,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:51:43,427 INFO L87 Difference]: Start difference. First operand 9471 states and 31599 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:46,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:46,514 INFO L93 Difference]: Finished difference Result 16347 states and 51964 transitions. [2021-05-22 02:51:46,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-22 02:51:46,514 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:51:46,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:46,539 INFO L225 Difference]: With dead ends: 16347 [2021-05-22 02:51:46,540 INFO L226 Difference]: Without dead ends: 16075 [2021-05-22 02:51:46,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 2495.1ms TimeCoverageRelationStatistics Valid=1131, Invalid=6879, Unknown=0, NotChecked=0, Total=8010 [2021-05-22 02:51:46,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16075 states. [2021-05-22 02:51:46,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16075 to 9481. [2021-05-22 02:51:46,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9481 states, 9480 states have (on average 3.334704641350211) internal successors, (31613), 9480 states have internal predecessors, (31613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:46,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9481 states to 9481 states and 31613 transitions. [2021-05-22 02:51:46,721 INFO L78 Accepts]: Start accepts. Automaton has 9481 states and 31613 transitions. Word has length 36 [2021-05-22 02:51:46,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:46,721 INFO L482 AbstractCegarLoop]: Abstraction has 9481 states and 31613 transitions. [2021-05-22 02:51:46,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:46,721 INFO L276 IsEmpty]: Start isEmpty. Operand 9481 states and 31613 transitions. [2021-05-22 02:51:46,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:51:46,732 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:46,732 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:46,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:46,932 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:46,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:46,933 INFO L82 PathProgramCache]: Analyzing trace with hash 663543393, now seen corresponding path program 65 times [2021-05-22 02:51:46,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:46,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397615841] [2021-05-22 02:51:46,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:46,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:47,160 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:47,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:47,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397615841] [2021-05-22 02:51:47,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397615841] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:47,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286130462] [2021-05-22 02:51:47,160 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:47,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:51:47,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:47,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:51:47,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:47,741 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:47,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286130462] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:47,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:47,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-05-22 02:51:47,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990495615] [2021-05-22 02:51:47,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-22 02:51:47,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:47,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-22 02:51:47,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1190, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:51:47,742 INFO L87 Difference]: Start difference. First operand 9481 states and 31613 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:51,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:51,430 INFO L93 Difference]: Finished difference Result 17046 states and 54034 transitions. [2021-05-22 02:51:51,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-22 02:51:51,430 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:51:51,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:51,455 INFO L225 Difference]: With dead ends: 17046 [2021-05-22 02:51:51,455 INFO L226 Difference]: Without dead ends: 16798 [2021-05-22 02:51:51,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3255 ImplicationChecksByTransitivity, 2941.1ms TimeCoverageRelationStatistics Valid=1396, Invalid=8704, Unknown=0, NotChecked=0, Total=10100 [2021-05-22 02:51:51,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16798 states. [2021-05-22 02:51:51,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16798 to 9516. [2021-05-22 02:51:51,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9516 states, 9515 states have (on average 3.333893851812927) internal successors, (31722), 9515 states have internal predecessors, (31722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:51,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9516 states to 9516 states and 31722 transitions. [2021-05-22 02:51:51,641 INFO L78 Accepts]: Start accepts. Automaton has 9516 states and 31722 transitions. Word has length 36 [2021-05-22 02:51:51,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:51,641 INFO L482 AbstractCegarLoop]: Abstraction has 9516 states and 31722 transitions. [2021-05-22 02:51:51,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:51,641 INFO L276 IsEmpty]: Start isEmpty. Operand 9516 states and 31722 transitions. [2021-05-22 02:51:51,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:51:51,652 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:51,652 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:51,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-05-22 02:51:51,852 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:51,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:51,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1447477403, now seen corresponding path program 66 times [2021-05-22 02:51:51,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:51,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588988560] [2021-05-22 02:51:51,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:51,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:52,101 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:52,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:52,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588988560] [2021-05-22 02:51:52,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588988560] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:52,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057166698] [2021-05-22 02:51:52,102 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:52,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:51:52,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:51:52,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:51:52,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:52,661 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:52,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057166698] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:52,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:52,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-22 02:51:52,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926874536] [2021-05-22 02:51:52,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:51:52,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:52,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:51:52,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:51:52,662 INFO L87 Difference]: Start difference. First operand 9516 states and 31722 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:58,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:51:58,176 INFO L93 Difference]: Finished difference Result 18367 states and 57873 transitions. [2021-05-22 02:51:58,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-05-22 02:51:58,176 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:51:58,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:51:58,204 INFO L225 Difference]: With dead ends: 18367 [2021-05-22 02:51:58,204 INFO L226 Difference]: Without dead ends: 18184 [2021-05-22 02:51:58,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4588 ImplicationChecksByTransitivity, 4019.4ms TimeCoverageRelationStatistics Valid=1975, Invalid=11597, Unknown=0, NotChecked=0, Total=13572 [2021-05-22 02:51:58,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18184 states. [2021-05-22 02:51:58,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18184 to 9510. [2021-05-22 02:51:58,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9510 states, 9509 states have (on average 3.3346303501945527) internal successors, (31709), 9509 states have internal predecessors, (31709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:58,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9510 states to 9510 states and 31709 transitions. [2021-05-22 02:51:58,433 INFO L78 Accepts]: Start accepts. Automaton has 9510 states and 31709 transitions. Word has length 36 [2021-05-22 02:51:58,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:51:58,433 INFO L482 AbstractCegarLoop]: Abstraction has 9510 states and 31709 transitions. [2021-05-22 02:51:58,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:51:58,433 INFO L276 IsEmpty]: Start isEmpty. Operand 9510 states and 31709 transitions. [2021-05-22 02:51:58,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:51:58,445 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:51:58,445 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:51:58,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-05-22 02:51:58,646 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:51:58,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:51:58,646 INFO L82 PathProgramCache]: Analyzing trace with hash -556327835, now seen corresponding path program 67 times [2021-05-22 02:51:58,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:51:58,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182173860] [2021-05-22 02:51:58,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:51:58,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:58,863 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:58,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:51:58,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182173860] [2021-05-22 02:51:58,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182173860] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:58,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381475490] [2021-05-22 02:51:58,864 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:51:58,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:51:58,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:51:58,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:51:59,430 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:51:59,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381475490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:51:59,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:51:59,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-22 02:51:59,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048096955] [2021-05-22 02:51:59,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:51:59,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:51:59,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:51:59,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:51:59,431 INFO L87 Difference]: Start difference. First operand 9510 states and 31709 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:01,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:01,119 INFO L93 Difference]: Finished difference Result 13786 states and 44215 transitions. [2021-05-22 02:52:01,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-22 02:52:01,120 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:52:01,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:01,141 INFO L225 Difference]: With dead ends: 13786 [2021-05-22 02:52:01,141 INFO L226 Difference]: Without dead ends: 13622 [2021-05-22 02:52:01,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1272 ImplicationChecksByTransitivity, 1650.4ms TimeCoverageRelationStatistics Valid=755, Invalid=3801, Unknown=0, NotChecked=0, Total=4556 [2021-05-22 02:52:01,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13622 states. [2021-05-22 02:52:01,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13622 to 9502. [2021-05-22 02:52:01,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9502 states, 9501 states have (on average 3.335333122829176) internal successors, (31689), 9501 states have internal predecessors, (31689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:01,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9502 states to 9502 states and 31689 transitions. [2021-05-22 02:52:01,313 INFO L78 Accepts]: Start accepts. Automaton has 9502 states and 31689 transitions. Word has length 36 [2021-05-22 02:52:01,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:01,313 INFO L482 AbstractCegarLoop]: Abstraction has 9502 states and 31689 transitions. [2021-05-22 02:52:01,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:01,313 INFO L276 IsEmpty]: Start isEmpty. Operand 9502 states and 31689 transitions. [2021-05-22 02:52:01,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:52:01,324 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:01,324 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:01,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:01,524 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:01,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:01,525 INFO L82 PathProgramCache]: Analyzing trace with hash -684298399, now seen corresponding path program 68 times [2021-05-22 02:52:01,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:01,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260836254] [2021-05-22 02:52:01,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:01,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:01,748 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:01,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:01,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260836254] [2021-05-22 02:52:01,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260836254] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:01,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041596339] [2021-05-22 02:52:01,748 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:01,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:52:01,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:01,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:52:01,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:02,276 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:02,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041596339] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:02,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:02,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-22 02:52:02,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886533764] [2021-05-22 02:52:02,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:52:02,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:02,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:52:02,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:52:02,277 INFO L87 Difference]: Start difference. First operand 9502 states and 31689 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:06,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:06,820 INFO L93 Difference]: Finished difference Result 14876 states and 47515 transitions. [2021-05-22 02:52:06,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-22 02:52:06,820 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:52:06,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:06,842 INFO L225 Difference]: With dead ends: 14876 [2021-05-22 02:52:06,843 INFO L226 Difference]: Without dead ends: 14655 [2021-05-22 02:52:06,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3007 ImplicationChecksByTransitivity, 3153.7ms TimeCoverageRelationStatistics Valid=1075, Invalid=8627, Unknown=0, NotChecked=0, Total=9702 [2021-05-22 02:52:06,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14655 states. [2021-05-22 02:52:07,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14655 to 9510. [2021-05-22 02:52:07,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9510 states, 9509 states have (on average 3.338416237248922) internal successors, (31745), 9509 states have internal predecessors, (31745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:07,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9510 states to 9510 states and 31745 transitions. [2021-05-22 02:52:07,038 INFO L78 Accepts]: Start accepts. Automaton has 9510 states and 31745 transitions. Word has length 36 [2021-05-22 02:52:07,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:07,039 INFO L482 AbstractCegarLoop]: Abstraction has 9510 states and 31745 transitions. [2021-05-22 02:52:07,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:07,039 INFO L276 IsEmpty]: Start isEmpty. Operand 9510 states and 31745 transitions. [2021-05-22 02:52:07,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:52:07,050 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:07,050 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:07,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-05-22 02:52:07,261 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:07,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:07,261 INFO L82 PathProgramCache]: Analyzing trace with hash -2051584159, now seen corresponding path program 69 times [2021-05-22 02:52:07,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:07,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633486000] [2021-05-22 02:52:07,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:07,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:07,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:07,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633486000] [2021-05-22 02:52:07,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633486000] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:07,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54918830] [2021-05-22 02:52:07,560 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:07,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:52:07,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:07,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:52:07,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:08,153 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:08,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54918830] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:08,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:08,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-05-22 02:52:08,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021491472] [2021-05-22 02:52:08,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:52:08,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:08,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:52:08,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:52:08,154 INFO L87 Difference]: Start difference. First operand 9510 states and 31745 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:11,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:11,220 INFO L93 Difference]: Finished difference Result 16123 states and 51334 transitions. [2021-05-22 02:52:11,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-22 02:52:11,220 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:52:11,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:11,242 INFO L225 Difference]: With dead ends: 16123 [2021-05-22 02:52:11,242 INFO L226 Difference]: Without dead ends: 16003 [2021-05-22 02:52:11,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1889 ImplicationChecksByTransitivity, 2558.1ms TimeCoverageRelationStatistics Valid=1070, Invalid=5410, Unknown=0, NotChecked=0, Total=6480 [2021-05-22 02:52:11,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16003 states. [2021-05-22 02:52:11,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16003 to 9524. [2021-05-22 02:52:11,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9524 states, 9523 states have (on average 3.3400189016066366) internal successors, (31807), 9523 states have internal predecessors, (31807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:11,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9524 states to 9524 states and 31807 transitions. [2021-05-22 02:52:11,417 INFO L78 Accepts]: Start accepts. Automaton has 9524 states and 31807 transitions. Word has length 36 [2021-05-22 02:52:11,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:11,417 INFO L482 AbstractCegarLoop]: Abstraction has 9524 states and 31807 transitions. [2021-05-22 02:52:11,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:11,417 INFO L276 IsEmpty]: Start isEmpty. Operand 9524 states and 31807 transitions. [2021-05-22 02:52:11,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:52:11,428 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:11,428 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:11,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:11,628 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:11,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:11,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1744269983, now seen corresponding path program 70 times [2021-05-22 02:52:11,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:11,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94213239] [2021-05-22 02:52:11,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:11,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:52:11,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:11,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94213239] [2021-05-22 02:52:11,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94213239] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:11,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198947817] [2021-05-22 02:52:11,852 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:11,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:52:11,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:11,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:52:11,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:12,420 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:12,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198947817] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:12,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:12,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-22 02:52:12,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083454104] [2021-05-22 02:52:12,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:52:12,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:12,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:52:12,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:52:12,421 INFO L87 Difference]: Start difference. First operand 9524 states and 31807 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:16,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:16,673 INFO L93 Difference]: Finished difference Result 18630 states and 58802 transitions. [2021-05-22 02:52:16,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-22 02:52:16,674 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:52:16,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:16,700 INFO L225 Difference]: With dead ends: 18630 [2021-05-22 02:52:16,700 INFO L226 Difference]: Without dead ends: 18458 [2021-05-22 02:52:16,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3242 ImplicationChecksByTransitivity, 3175.6ms TimeCoverageRelationStatistics Valid=1708, Invalid=8392, Unknown=0, NotChecked=0, Total=10100 [2021-05-22 02:52:16,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18458 states. [2021-05-22 02:52:16,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18458 to 9524. [2021-05-22 02:52:16,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9524 states, 9523 states have (on average 3.3400189016066366) internal successors, (31807), 9523 states have internal predecessors, (31807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:16,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9524 states to 9524 states and 31807 transitions. [2021-05-22 02:52:16,920 INFO L78 Accepts]: Start accepts. Automaton has 9524 states and 31807 transitions. Word has length 36 [2021-05-22 02:52:16,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:16,920 INFO L482 AbstractCegarLoop]: Abstraction has 9524 states and 31807 transitions. [2021-05-22 02:52:16,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:16,920 INFO L276 IsEmpty]: Start isEmpty. Operand 9524 states and 31807 transitions. [2021-05-22 02:52:16,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:52:16,931 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:16,931 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:17,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-05-22 02:52:17,137 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:17,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:17,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1544243469, now seen corresponding path program 71 times [2021-05-22 02:52:17,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:17,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682568486] [2021-05-22 02:52:17,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:17,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:17,483 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:17,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:17,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682568486] [2021-05-22 02:52:17,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682568486] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:17,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988348670] [2021-05-22 02:52:17,483 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:17,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:52:17,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:17,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-22 02:52:17,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:18,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988348670] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:18,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:18,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-05-22 02:52:18,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637737869] [2021-05-22 02:52:18,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-22 02:52:18,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:18,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-22 02:52:18,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:52:18,135 INFO L87 Difference]: Start difference. First operand 9524 states and 31807 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:19,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:19,151 INFO L93 Difference]: Finished difference Result 10252 states and 33744 transitions. [2021-05-22 02:52:19,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-22 02:52:19,152 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:52:19,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:19,167 INFO L225 Difference]: With dead ends: 10252 [2021-05-22 02:52:19,167 INFO L226 Difference]: Without dead ends: 10198 [2021-05-22 02:52:19,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1292.9ms TimeCoverageRelationStatistics Valid=380, Invalid=2272, Unknown=0, NotChecked=0, Total=2652 [2021-05-22 02:52:19,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10198 states. [2021-05-22 02:52:19,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10198 to 9524. [2021-05-22 02:52:19,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9524 states, 9523 states have (on average 3.3421190801218104) internal successors, (31827), 9523 states have internal predecessors, (31827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:19,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9524 states to 9524 states and 31827 transitions. [2021-05-22 02:52:19,316 INFO L78 Accepts]: Start accepts. Automaton has 9524 states and 31827 transitions. Word has length 36 [2021-05-22 02:52:19,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:19,317 INFO L482 AbstractCegarLoop]: Abstraction has 9524 states and 31827 transitions. [2021-05-22 02:52:19,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:19,317 INFO L276 IsEmpty]: Start isEmpty. Operand 9524 states and 31827 transitions. [2021-05-22 02:52:19,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:52:19,327 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:19,328 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:19,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable602 [2021-05-22 02:52:19,528 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:19,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:19,528 INFO L82 PathProgramCache]: Analyzing trace with hash -354285555, now seen corresponding path program 72 times [2021-05-22 02:52:19,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:19,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752051744] [2021-05-22 02:52:19,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:19,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:19,813 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:19,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:19,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752051744] [2021-05-22 02:52:19,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752051744] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:19,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546105259] [2021-05-22 02:52:19,813 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:19,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:52:19,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:19,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:52:19,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:20,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546105259] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:20,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:20,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-05-22 02:52:20,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84479922] [2021-05-22 02:52:20,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:52:20,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:20,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:52:20,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:52:20,451 INFO L87 Difference]: Start difference. First operand 9524 states and 31827 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:22,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:22,059 INFO L93 Difference]: Finished difference Result 10196 states and 33634 transitions. [2021-05-22 02:52:22,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-22 02:52:22,059 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:52:22,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:22,075 INFO L225 Difference]: With dead ends: 10196 [2021-05-22 02:52:22,075 INFO L226 Difference]: Without dead ends: 10082 [2021-05-22 02:52:22,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1384.7ms TimeCoverageRelationStatistics Valid=368, Invalid=2388, Unknown=0, NotChecked=0, Total=2756 [2021-05-22 02:52:22,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10082 states. [2021-05-22 02:52:22,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10082 to 9560. [2021-05-22 02:52:22,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9560 states, 9559 states have (on average 3.340830630819123) internal successors, (31935), 9559 states have internal predecessors, (31935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:22,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9560 states to 9560 states and 31935 transitions. [2021-05-22 02:52:22,208 INFO L78 Accepts]: Start accepts. Automaton has 9560 states and 31935 transitions. Word has length 36 [2021-05-22 02:52:22,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:22,208 INFO L482 AbstractCegarLoop]: Abstraction has 9560 states and 31935 transitions. [2021-05-22 02:52:22,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:22,208 INFO L276 IsEmpty]: Start isEmpty. Operand 9560 states and 31935 transitions. [2021-05-22 02:52:22,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:52:22,218 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:22,218 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:22,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:22,418 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:22,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:22,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1192212723, now seen corresponding path program 73 times [2021-05-22 02:52:22,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:22,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971039099] [2021-05-22 02:52:22,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:22,638 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:22,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:22,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971039099] [2021-05-22 02:52:22,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971039099] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:22,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346053595] [2021-05-22 02:52:22,638 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:22,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:22,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:52:22,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:23,211 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:23,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346053595] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:23,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:23,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-22 02:52:23,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120602797] [2021-05-22 02:52:23,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:52:23,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:23,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:52:23,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:52:23,212 INFO L87 Difference]: Start difference. First operand 9560 states and 31935 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:24,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:24,576 INFO L93 Difference]: Finished difference Result 10336 states and 34015 transitions. [2021-05-22 02:52:24,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-22 02:52:24,577 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:52:24,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:24,592 INFO L225 Difference]: With dead ends: 10336 [2021-05-22 02:52:24,592 INFO L226 Difference]: Without dead ends: 10156 [2021-05-22 02:52:24,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 1269.0ms TimeCoverageRelationStatistics Valid=466, Invalid=2726, Unknown=0, NotChecked=0, Total=3192 [2021-05-22 02:52:24,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10156 states. [2021-05-22 02:52:24,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10156 to 9528. [2021-05-22 02:52:24,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9528 states, 9527 states have (on average 3.3432350162695497) internal successors, (31851), 9527 states have internal predecessors, (31851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:24,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9528 states to 9528 states and 31851 transitions. [2021-05-22 02:52:24,741 INFO L78 Accepts]: Start accepts. Automaton has 9528 states and 31851 transitions. Word has length 36 [2021-05-22 02:52:24,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:24,741 INFO L482 AbstractCegarLoop]: Abstraction has 9528 states and 31851 transitions. [2021-05-22 02:52:24,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:24,741 INFO L276 IsEmpty]: Start isEmpty. Operand 9528 states and 31851 transitions. [2021-05-22 02:52:24,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:52:24,752 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:24,752 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:24,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable617,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:24,953 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:24,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:24,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1547403025, now seen corresponding path program 74 times [2021-05-22 02:52:24,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:24,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484176711] [2021-05-22 02:52:24,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:24,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:25,265 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:25,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:25,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484176711] [2021-05-22 02:52:25,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484176711] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:25,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095634646] [2021-05-22 02:52:25,265 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:25,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:52:25,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:25,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:52:25,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:25,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095634646] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:25,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:25,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-05-22 02:52:25,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377996948] [2021-05-22 02:52:25,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:52:25,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:25,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:52:25,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:52:25,947 INFO L87 Difference]: Start difference. First operand 9528 states and 31851 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:29,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:29,056 INFO L93 Difference]: Finished difference Result 13472 states and 43399 transitions. [2021-05-22 02:52:29,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-22 02:52:29,056 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:52:29,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:29,075 INFO L225 Difference]: With dead ends: 13472 [2021-05-22 02:52:29,075 INFO L226 Difference]: Without dead ends: 13358 [2021-05-22 02:52:29,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1781 ImplicationChecksByTransitivity, 2382.9ms TimeCoverageRelationStatistics Valid=799, Invalid=5207, Unknown=0, NotChecked=0, Total=6006 [2021-05-22 02:52:29,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13358 states. [2021-05-22 02:52:29,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13358 to 9512. [2021-05-22 02:52:29,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9512 states, 9511 states have (on average 3.344232993376091) internal successors, (31807), 9511 states have internal predecessors, (31807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:29,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9512 states to 9512 states and 31807 transitions. [2021-05-22 02:52:29,248 INFO L78 Accepts]: Start accepts. Automaton has 9512 states and 31807 transitions. Word has length 36 [2021-05-22 02:52:29,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:29,248 INFO L482 AbstractCegarLoop]: Abstraction has 9512 states and 31807 transitions. [2021-05-22 02:52:29,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:29,248 INFO L276 IsEmpty]: Start isEmpty. Operand 9512 states and 31807 transitions. [2021-05-22 02:52:29,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:52:29,259 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:29,259 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:29,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable621,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:29,460 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:29,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:29,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1312007693, now seen corresponding path program 75 times [2021-05-22 02:52:29,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:29,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538402482] [2021-05-22 02:52:29,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:29,784 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:29,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:29,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538402482] [2021-05-22 02:52:29,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538402482] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:29,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755992339] [2021-05-22 02:52:29,784 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:29,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:52:29,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:29,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:52:29,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:30,469 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:30,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755992339] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:30,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:30,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 36 [2021-05-22 02:52:30,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003609812] [2021-05-22 02:52:30,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:52:30,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:30,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:52:30,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1092, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:52:30,470 INFO L87 Difference]: Start difference. First operand 9512 states and 31807 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:34,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:34,173 INFO L93 Difference]: Finished difference Result 16362 states and 52136 transitions. [2021-05-22 02:52:34,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-22 02:52:34,173 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:52:34,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:34,196 INFO L225 Difference]: With dead ends: 16362 [2021-05-22 02:52:34,196 INFO L226 Difference]: Without dead ends: 16221 [2021-05-22 02:52:34,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2905 ImplicationChecksByTransitivity, 3107.0ms TimeCoverageRelationStatistics Valid=1441, Invalid=7489, Unknown=0, NotChecked=0, Total=8930 [2021-05-22 02:52:34,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16221 states. [2021-05-22 02:52:34,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16221 to 9564. [2021-05-22 02:52:34,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9564 states, 9563 states have (on average 3.3460211230785317) internal successors, (31998), 9563 states have internal predecessors, (31998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:34,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9564 states to 9564 states and 31998 transitions. [2021-05-22 02:52:34,373 INFO L78 Accepts]: Start accepts. Automaton has 9564 states and 31998 transitions. Word has length 36 [2021-05-22 02:52:34,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:34,374 INFO L482 AbstractCegarLoop]: Abstraction has 9564 states and 31998 transitions. [2021-05-22 02:52:34,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:34,374 INFO L276 IsEmpty]: Start isEmpty. Operand 9564 states and 31998 transitions. [2021-05-22 02:52:34,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:52:34,385 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:34,385 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:34,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable632 [2021-05-22 02:52:34,585 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:34,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:34,585 INFO L82 PathProgramCache]: Analyzing trace with hash 776721425, now seen corresponding path program 76 times [2021-05-22 02:52:34,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:34,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971183161] [2021-05-22 02:52:34,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:34,806 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:34,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:34,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971183161] [2021-05-22 02:52:34,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971183161] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:34,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217645656] [2021-05-22 02:52:34,807 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:34,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:52:34,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:34,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:52:34,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:35,366 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:35,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217645656] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:35,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:35,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-05-22 02:52:35,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271674462] [2021-05-22 02:52:35,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-22 02:52:35,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:35,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-22 02:52:35,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1199, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:52:35,367 INFO L87 Difference]: Start difference. First operand 9564 states and 31998 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:37,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:37,275 INFO L93 Difference]: Finished difference Result 14020 states and 45032 transitions. [2021-05-22 02:52:37,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-22 02:52:37,276 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:52:37,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:37,295 INFO L225 Difference]: With dead ends: 14020 [2021-05-22 02:52:37,295 INFO L226 Difference]: Without dead ends: 13808 [2021-05-22 02:52:37,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 1727.9ms TimeCoverageRelationStatistics Valid=736, Invalid=4520, Unknown=0, NotChecked=0, Total=5256 [2021-05-22 02:52:37,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13808 states. [2021-05-22 02:52:37,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13808 to 9532. [2021-05-22 02:52:37,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9532 states, 9531 states have (on average 3.348861609484839) internal successors, (31918), 9531 states have internal predecessors, (31918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:37,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9532 states to 9532 states and 31918 transitions. [2021-05-22 02:52:37,456 INFO L78 Accepts]: Start accepts. Automaton has 9532 states and 31918 transitions. Word has length 36 [2021-05-22 02:52:37,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:37,456 INFO L482 AbstractCegarLoop]: Abstraction has 9532 states and 31918 transitions. [2021-05-22 02:52:37,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:37,457 INFO L276 IsEmpty]: Start isEmpty. Operand 9532 states and 31918 transitions. [2021-05-22 02:52:37,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:52:37,468 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:37,468 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:37,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-05-22 02:52:37,668 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:37,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:37,669 INFO L82 PathProgramCache]: Analyzing trace with hash 454800909, now seen corresponding path program 77 times [2021-05-22 02:52:37,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:37,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533576492] [2021-05-22 02:52:37,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:37,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:37,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533576492] [2021-05-22 02:52:37,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533576492] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:37,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204121257] [2021-05-22 02:52:37,917 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:37,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:52:37,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:37,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:52:37,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:38,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204121257] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:38,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:38,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-05-22 02:52:38,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912985480] [2021-05-22 02:52:38,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-22 02:52:38,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:38,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-22 02:52:38,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:52:38,481 INFO L87 Difference]: Start difference. First operand 9532 states and 31918 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:40,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:40,821 INFO L93 Difference]: Finished difference Result 14454 states and 46414 transitions. [2021-05-22 02:52:40,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-22 02:52:40,822 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:52:40,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:40,840 INFO L225 Difference]: With dead ends: 14454 [2021-05-22 02:52:40,840 INFO L226 Difference]: Without dead ends: 14270 [2021-05-22 02:52:40,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1920 ImplicationChecksByTransitivity, 1970.9ms TimeCoverageRelationStatistics Valid=874, Invalid=5288, Unknown=0, NotChecked=0, Total=6162 [2021-05-22 02:52:40,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14270 states. [2021-05-22 02:52:40,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14270 to 9504. [2021-05-22 02:52:40,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9504 states, 9503 states have (on average 3.351994107124066) internal successors, (31854), 9503 states have internal predecessors, (31854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:40,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9504 states to 9504 states and 31854 transitions. [2021-05-22 02:52:40,997 INFO L78 Accepts]: Start accepts. Automaton has 9504 states and 31854 transitions. Word has length 36 [2021-05-22 02:52:40,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:40,997 INFO L482 AbstractCegarLoop]: Abstraction has 9504 states and 31854 transitions. [2021-05-22 02:52:40,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:40,998 INFO L276 IsEmpty]: Start isEmpty. Operand 9504 states and 31854 transitions. [2021-05-22 02:52:41,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:52:41,009 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:41,009 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:41,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable645,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:41,209 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:41,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:41,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1194222865, now seen corresponding path program 78 times [2021-05-22 02:52:41,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:41,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189205208] [2021-05-22 02:52:41,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:41,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:41,438 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:41,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:41,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189205208] [2021-05-22 02:52:41,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189205208] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:41,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998735950] [2021-05-22 02:52:41,439 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:41,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:52:41,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:41,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:52:41,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:41,950 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:41,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998735950] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:41,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:41,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-05-22 02:52:41,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671274336] [2021-05-22 02:52:41,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:52:41,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:41,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:52:41,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:52:41,951 INFO L87 Difference]: Start difference. First operand 9504 states and 31854 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:46,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:46,526 INFO L93 Difference]: Finished difference Result 16078 states and 51312 transitions. [2021-05-22 02:52:46,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-22 02:52:46,526 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:52:46,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:46,549 INFO L225 Difference]: With dead ends: 16078 [2021-05-22 02:52:46,549 INFO L226 Difference]: Without dead ends: 15779 [2021-05-22 02:52:46,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3988 ImplicationChecksByTransitivity, 3358.6ms TimeCoverageRelationStatistics Valid=1235, Invalid=10537, Unknown=0, NotChecked=0, Total=11772 [2021-05-22 02:52:46,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15779 states. [2021-05-22 02:52:46,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15779 to 9476. [2021-05-22 02:52:46,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9476 states, 9475 states have (on average 3.35155672823219) internal successors, (31756), 9475 states have internal predecessors, (31756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:46,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9476 states to 9476 states and 31756 transitions. [2021-05-22 02:52:46,728 INFO L78 Accepts]: Start accepts. Automaton has 9476 states and 31756 transitions. Word has length 36 [2021-05-22 02:52:46,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:46,728 INFO L482 AbstractCegarLoop]: Abstraction has 9476 states and 31756 transitions. [2021-05-22 02:52:46,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:46,728 INFO L276 IsEmpty]: Start isEmpty. Operand 9476 states and 31756 transitions. [2021-05-22 02:52:46,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:52:46,739 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:46,739 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:46,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable649 [2021-05-22 02:52:46,940 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:46,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:46,940 INFO L82 PathProgramCache]: Analyzing trace with hash -2099893235, now seen corresponding path program 79 times [2021-05-22 02:52:46,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:46,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789268722] [2021-05-22 02:52:46,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:46,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:47,204 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:47,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:47,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789268722] [2021-05-22 02:52:47,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789268722] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:47,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549485355] [2021-05-22 02:52:47,204 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:47,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:47,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:52:47,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:47,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549485355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:47,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:47,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-05-22 02:52:47,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520339942] [2021-05-22 02:52:47,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-22 02:52:47,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:47,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-22 02:52:47,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:52:47,847 INFO L87 Difference]: Start difference. First operand 9476 states and 31756 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:51,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:51,641 INFO L93 Difference]: Finished difference Result 16847 states and 53541 transitions. [2021-05-22 02:52:51,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-22 02:52:51,641 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:52:51,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:51,664 INFO L225 Difference]: With dead ends: 16847 [2021-05-22 02:52:51,665 INFO L226 Difference]: Without dead ends: 16599 [2021-05-22 02:52:51,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3253 ImplicationChecksByTransitivity, 2958.1ms TimeCoverageRelationStatistics Valid=1311, Invalid=8789, Unknown=0, NotChecked=0, Total=10100 [2021-05-22 02:52:51,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16599 states. [2021-05-22 02:52:51,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16599 to 9476. [2021-05-22 02:52:51,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9476 states, 9475 states have (on average 3.350817941952507) internal successors, (31749), 9475 states have internal predecessors, (31749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:51,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9476 states to 9476 states and 31749 transitions. [2021-05-22 02:52:51,858 INFO L78 Accepts]: Start accepts. Automaton has 9476 states and 31749 transitions. Word has length 36 [2021-05-22 02:52:51,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:51,858 INFO L482 AbstractCegarLoop]: Abstraction has 9476 states and 31749 transitions. [2021-05-22 02:52:51,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:51,858 INFO L276 IsEmpty]: Start isEmpty. Operand 9476 states and 31749 transitions. [2021-05-22 02:52:51,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:52:51,869 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:51,869 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:52,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable653 [2021-05-22 02:52:52,070 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:52,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:52,070 INFO L82 PathProgramCache]: Analyzing trace with hash 84053265, now seen corresponding path program 80 times [2021-05-22 02:52:52,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:52,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758461024] [2021-05-22 02:52:52,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:52,329 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:52,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:52,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758461024] [2021-05-22 02:52:52,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758461024] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:52,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407546619] [2021-05-22 02:52:52,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:52,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:52:52,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:52,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:52:52,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:52,876 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:52,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407546619] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:52,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:52,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-05-22 02:52:52,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936069106] [2021-05-22 02:52:52,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:52:52,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:52,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:52:52,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:52:52,877 INFO L87 Difference]: Start difference. First operand 9476 states and 31749 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:58,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:58,379 INFO L93 Difference]: Finished difference Result 18120 states and 57307 transitions. [2021-05-22 02:52:58,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-05-22 02:52:58,379 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:52:58,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:58,404 INFO L225 Difference]: With dead ends: 18120 [2021-05-22 02:52:58,405 INFO L226 Difference]: Without dead ends: 17937 [2021-05-22 02:52:58,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4718 ImplicationChecksByTransitivity, 4087.2ms TimeCoverageRelationStatistics Valid=1926, Invalid=11880, Unknown=0, NotChecked=0, Total=13806 [2021-05-22 02:52:58,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17937 states. [2021-05-22 02:52:58,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17937 to 9447. [2021-05-22 02:52:58,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9447 states, 9446 states have (on average 3.34977768367563) internal successors, (31642), 9446 states have internal predecessors, (31642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:58,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9447 states to 9447 states and 31642 transitions. [2021-05-22 02:52:58,611 INFO L78 Accepts]: Start accepts. Automaton has 9447 states and 31642 transitions. Word has length 36 [2021-05-22 02:52:58,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:58,611 INFO L482 AbstractCegarLoop]: Abstraction has 9447 states and 31642 transitions. [2021-05-22 02:52:58,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:58,611 INFO L276 IsEmpty]: Start isEmpty. Operand 9447 states and 31642 transitions. [2021-05-22 02:52:58,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:52:58,621 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:58,622 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:58,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable657,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:58,822 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:58,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:58,822 INFO L82 PathProgramCache]: Analyzing trace with hash -859968943, now seen corresponding path program 81 times [2021-05-22 02:52:58,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:58,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710398659] [2021-05-22 02:52:58,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:58,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:59,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:59,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710398659] [2021-05-22 02:52:59,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710398659] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:59,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872920231] [2021-05-22 02:52:59,144 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:59,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:52:59,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:59,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:52:59,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:59,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872920231] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:59,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:59,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-05-22 02:52:59,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620034392] [2021-05-22 02:52:59,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:52:59,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:59,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:52:59,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:52:59,769 INFO L87 Difference]: Start difference. First operand 9447 states and 31642 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:03,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:03,136 INFO L93 Difference]: Finished difference Result 18867 states and 60832 transitions. [2021-05-22 02:53:03,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-22 02:53:03,136 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:53:03,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:03,164 INFO L225 Difference]: With dead ends: 18867 [2021-05-22 02:53:03,165 INFO L226 Difference]: Without dead ends: 18741 [2021-05-22 02:53:03,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2437 ImplicationChecksByTransitivity, 2883.9ms TimeCoverageRelationStatistics Valid=1200, Invalid=6632, Unknown=0, NotChecked=0, Total=7832 [2021-05-22 02:53:03,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18741 states. [2021-05-22 02:53:03,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18741 to 9611. [2021-05-22 02:53:03,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9611 states, 9610 states have (on average 3.3521331945889696) internal successors, (32214), 9610 states have internal predecessors, (32214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:03,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9611 states to 9611 states and 32214 transitions. [2021-05-22 02:53:03,371 INFO L78 Accepts]: Start accepts. Automaton has 9611 states and 32214 transitions. Word has length 36 [2021-05-22 02:53:03,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:03,371 INFO L482 AbstractCegarLoop]: Abstraction has 9611 states and 32214 transitions. [2021-05-22 02:53:03,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:03,371 INFO L276 IsEmpty]: Start isEmpty. Operand 9611 states and 32214 transitions. [2021-05-22 02:53:03,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:53:03,382 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:03,382 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:03,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable661 [2021-05-22 02:53:03,592 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:03,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:03,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1227510575, now seen corresponding path program 82 times [2021-05-22 02:53:03,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:03,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374090632] [2021-05-22 02:53:03,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:03,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:03,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:03,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374090632] [2021-05-22 02:53:03,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374090632] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:03,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431150335] [2021-05-22 02:53:03,955 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:03,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:53:03,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:03,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:53:03,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:04,722 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:04,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431150335] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:04,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:04,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-22 02:53:04,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727085910] [2021-05-22 02:53:04,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:53:04,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:04,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:53:04,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:53:04,723 INFO L87 Difference]: Start difference. First operand 9611 states and 32214 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:06,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:06,001 INFO L93 Difference]: Finished difference Result 12393 states and 40388 transitions. [2021-05-22 02:53:06,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-22 02:53:06,001 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:53:06,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:06,020 INFO L225 Difference]: With dead ends: 12393 [2021-05-22 02:53:06,020 INFO L226 Difference]: Without dead ends: 12305 [2021-05-22 02:53:06,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1559.5ms TimeCoverageRelationStatistics Valid=518, Invalid=2904, Unknown=0, NotChecked=0, Total=3422 [2021-05-22 02:53:06,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12305 states. [2021-05-22 02:53:06,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12305 to 9755. [2021-05-22 02:53:06,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9755 states, 9754 states have (on average 3.352778347344679) internal successors, (32703), 9754 states have internal predecessors, (32703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:06,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9755 states to 9755 states and 32703 transitions. [2021-05-22 02:53:06,178 INFO L78 Accepts]: Start accepts. Automaton has 9755 states and 32703 transitions. Word has length 36 [2021-05-22 02:53:06,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:06,178 INFO L482 AbstractCegarLoop]: Abstraction has 9755 states and 32703 transitions. [2021-05-22 02:53:06,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:06,178 INFO L276 IsEmpty]: Start isEmpty. Operand 9755 states and 32703 transitions. [2021-05-22 02:53:06,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:53:06,189 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:06,189 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:06,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable673 [2021-05-22 02:53:06,390 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:06,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:06,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1040210897, now seen corresponding path program 83 times [2021-05-22 02:53:06,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:06,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999605363] [2021-05-22 02:53:06,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:06,697 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:06,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:06,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999605363] [2021-05-22 02:53:06,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999605363] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:06,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394316482] [2021-05-22 02:53:06,697 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:06,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 02:53:06,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:06,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:53:06,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:07,139 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-05-22 02:53:07,464 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-05-22 02:53:07,743 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-05-22 02:53:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:07,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394316482] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:07,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:07,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-22 02:53:07,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940336713] [2021-05-22 02:53:07,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:53:07,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:07,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:53:07,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:53:07,866 INFO L87 Difference]: Start difference. First operand 9755 states and 32703 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:10,538 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-05-22 02:53:10,917 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-05-22 02:53:11,234 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-05-22 02:53:11,610 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-05-22 02:53:11,811 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-05-22 02:53:12,299 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 74 [2021-05-22 02:53:13,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:13,225 INFO L93 Difference]: Finished difference Result 16091 states and 52051 transitions. [2021-05-22 02:53:13,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-22 02:53:13,225 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:53:13,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:13,249 INFO L225 Difference]: With dead ends: 16091 [2021-05-22 02:53:13,249 INFO L226 Difference]: Without dead ends: 16002 [2021-05-22 02:53:13,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3005 ImplicationChecksByTransitivity, 5150.3ms TimeCoverageRelationStatistics Valid=1450, Invalid=8056, Unknown=0, NotChecked=0, Total=9506 [2021-05-22 02:53:13,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16002 states. [2021-05-22 02:53:13,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16002 to 9791. [2021-05-22 02:53:13,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9791 states, 9790 states have (on average 3.354749744637385) internal successors, (32843), 9790 states have internal predecessors, (32843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:13,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9791 states to 9791 states and 32843 transitions. [2021-05-22 02:53:13,431 INFO L78 Accepts]: Start accepts. Automaton has 9791 states and 32843 transitions. Word has length 36 [2021-05-22 02:53:13,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:13,431 INFO L482 AbstractCegarLoop]: Abstraction has 9791 states and 32843 transitions. [2021-05-22 02:53:13,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:13,431 INFO L276 IsEmpty]: Start isEmpty. Operand 9791 states and 32843 transitions. [2021-05-22 02:53:13,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:53:13,442 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:13,442 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:13,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable682,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:13,643 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:13,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:13,643 INFO L82 PathProgramCache]: Analyzing trace with hash 562424665, now seen corresponding path program 84 times [2021-05-22 02:53:13,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:13,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905279229] [2021-05-22 02:53:13,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:13,939 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:13,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:13,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905279229] [2021-05-22 02:53:13,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905279229] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:13,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351653022] [2021-05-22 02:53:13,939 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:13,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:53:13,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:13,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:53:13,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:14,636 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:14,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351653022] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:14,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:14,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-05-22 02:53:14,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841223344] [2021-05-22 02:53:14,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-22 02:53:14,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:14,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-22 02:53:14,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:53:14,637 INFO L87 Difference]: Start difference. First operand 9791 states and 32843 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:16,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:16,247 INFO L93 Difference]: Finished difference Result 12226 states and 40208 transitions. [2021-05-22 02:53:16,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-22 02:53:16,248 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:53:16,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:16,265 INFO L225 Difference]: With dead ends: 12226 [2021-05-22 02:53:16,265 INFO L226 Difference]: Without dead ends: 12106 [2021-05-22 02:53:16,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1613.3ms TimeCoverageRelationStatistics Valid=568, Invalid=2854, Unknown=0, NotChecked=0, Total=3422 [2021-05-22 02:53:16,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12106 states. [2021-05-22 02:53:16,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12106 to 9799. [2021-05-22 02:53:16,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9799 states, 9798 states have (on average 3.3548683404776485) internal successors, (32871), 9798 states have internal predecessors, (32871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:16,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9799 states to 9799 states and 32871 transitions. [2021-05-22 02:53:16,420 INFO L78 Accepts]: Start accepts. Automaton has 9799 states and 32871 transitions. Word has length 36 [2021-05-22 02:53:16,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:16,420 INFO L482 AbstractCegarLoop]: Abstraction has 9799 states and 32871 transitions. [2021-05-22 02:53:16,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:16,420 INFO L276 IsEmpty]: Start isEmpty. Operand 9799 states and 32871 transitions. [2021-05-22 02:53:16,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:53:16,432 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:16,432 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:16,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:16,632 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:16,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:16,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1835358373, now seen corresponding path program 85 times [2021-05-22 02:53:16,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:16,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290695196] [2021-05-22 02:53:16,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:16,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:16,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:16,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290695196] [2021-05-22 02:53:16,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290695196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:16,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485002257] [2021-05-22 02:53:16,920 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:16,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:16,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:53:16,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:17,563 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:17,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485002257] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:17,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:17,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 02:53:17,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507612999] [2021-05-22 02:53:17,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:53:17,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:17,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:53:17,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1006, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:53:17,564 INFO L87 Difference]: Start difference. First operand 9799 states and 32871 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:18,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:18,927 INFO L93 Difference]: Finished difference Result 11929 states and 39454 transitions. [2021-05-22 02:53:18,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-22 02:53:18,928 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:53:18,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:18,945 INFO L225 Difference]: With dead ends: 11929 [2021-05-22 02:53:18,945 INFO L226 Difference]: Without dead ends: 11809 [2021-05-22 02:53:18,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1385.5ms TimeCoverageRelationStatistics Valid=448, Invalid=2308, Unknown=0, NotChecked=0, Total=2756 [2021-05-22 02:53:18,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11809 states. [2021-05-22 02:53:19,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11809 to 9839. [2021-05-22 02:53:19,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9839 states, 9838 states have (on average 3.3558650132140677) internal successors, (33015), 9838 states have internal predecessors, (33015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:19,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9839 states to 9839 states and 33015 transitions. [2021-05-22 02:53:19,102 INFO L78 Accepts]: Start accepts. Automaton has 9839 states and 33015 transitions. Word has length 36 [2021-05-22 02:53:19,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:19,103 INFO L482 AbstractCegarLoop]: Abstraction has 9839 states and 33015 transitions. [2021-05-22 02:53:19,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:19,103 INFO L276 IsEmpty]: Start isEmpty. Operand 9839 states and 33015 transitions. [2021-05-22 02:53:19,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:53:19,113 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:19,113 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:19,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable702 [2021-05-22 02:53:19,329 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:19,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:19,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1765248337, now seen corresponding path program 86 times [2021-05-22 02:53:19,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:19,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857189417] [2021-05-22 02:53:19,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:19,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:19,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857189417] [2021-05-22 02:53:19,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857189417] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:19,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035131636] [2021-05-22 02:53:19,629 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:19,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:53:19,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:19,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:53:19,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:20,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035131636] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:20,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:20,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-05-22 02:53:20,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643726163] [2021-05-22 02:53:20,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-22 02:53:20,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:20,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-22 02:53:20,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:53:20,246 INFO L87 Difference]: Start difference. First operand 9839 states and 33015 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:21,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:21,546 INFO L93 Difference]: Finished difference Result 11109 states and 36822 transitions. [2021-05-22 02:53:21,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-22 02:53:21,546 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:53:21,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:21,562 INFO L225 Difference]: With dead ends: 11109 [2021-05-22 02:53:21,562 INFO L226 Difference]: Without dead ends: 10989 [2021-05-22 02:53:21,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 1361.0ms TimeCoverageRelationStatistics Valid=431, Invalid=2019, Unknown=0, NotChecked=0, Total=2450 [2021-05-22 02:53:21,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10989 states. [2021-05-22 02:53:21,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10989 to 9847. [2021-05-22 02:53:21,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9847 states, 9846 states have (on average 3.3555758683729433) internal successors, (33039), 9846 states have internal predecessors, (33039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:21,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9847 states to 9847 states and 33039 transitions. [2021-05-22 02:53:21,713 INFO L78 Accepts]: Start accepts. Automaton has 9847 states and 33039 transitions. Word has length 36 [2021-05-22 02:53:21,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:21,713 INFO L482 AbstractCegarLoop]: Abstraction has 9847 states and 33039 transitions. [2021-05-22 02:53:21,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:21,713 INFO L276 IsEmpty]: Start isEmpty. Operand 9847 states and 33039 transitions. [2021-05-22 02:53:21,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:53:21,724 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:21,724 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:21,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable714,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:21,925 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:21,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:21,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1048846579, now seen corresponding path program 87 times [2021-05-22 02:53:21,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:21,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767025440] [2021-05-22 02:53:21,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:21,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:22,216 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:22,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:22,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767025440] [2021-05-22 02:53:22,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767025440] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:22,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226502920] [2021-05-22 02:53:22,217 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:22,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-22 02:53:22,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:22,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:53:22,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:22,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226502920] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:22,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:22,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-05-22 02:53:22,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496631873] [2021-05-22 02:53:22,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:53:22,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:22,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:53:22,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:53:22,842 INFO L87 Difference]: Start difference. First operand 9847 states and 33039 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:25,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:25,094 INFO L93 Difference]: Finished difference Result 15253 states and 49125 transitions. [2021-05-22 02:53:25,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-22 02:53:25,094 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:53:25,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:25,117 INFO L225 Difference]: With dead ends: 15253 [2021-05-22 02:53:25,118 INFO L226 Difference]: Without dead ends: 15075 [2021-05-22 02:53:25,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1550 ImplicationChecksByTransitivity, 2079.9ms TimeCoverageRelationStatistics Valid=993, Invalid=4119, Unknown=0, NotChecked=0, Total=5112 [2021-05-22 02:53:25,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15075 states. [2021-05-22 02:53:25,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15075 to 9913. [2021-05-22 02:53:25,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9913 states, 9912 states have (on average 3.355730427764326) internal successors, (33262), 9912 states have internal predecessors, (33262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:25,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9913 states to 9913 states and 33262 transitions. [2021-05-22 02:53:25,307 INFO L78 Accepts]: Start accepts. Automaton has 9913 states and 33262 transitions. Word has length 36 [2021-05-22 02:53:25,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:25,307 INFO L482 AbstractCegarLoop]: Abstraction has 9913 states and 33262 transitions. [2021-05-22 02:53:25,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:25,307 INFO L276 IsEmpty]: Start isEmpty. Operand 9913 states and 33262 transitions. [2021-05-22 02:53:25,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:53:25,318 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:25,318 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:25,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable723 [2021-05-22 02:53:25,519 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:25,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:25,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1426910801, now seen corresponding path program 88 times [2021-05-22 02:53:25,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:25,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211749852] [2021-05-22 02:53:25,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:25,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:25,812 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:25,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:25,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211749852] [2021-05-22 02:53:25,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211749852] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:25,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369632487] [2021-05-22 02:53:25,813 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:25,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:53:25,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:25,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:53:25,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:26,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369632487] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:26,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:26,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 02:53:26,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240837292] [2021-05-22 02:53:26,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:53:26,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:26,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:53:26,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1006, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:53:26,525 INFO L87 Difference]: Start difference. First operand 9913 states and 33262 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:27,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:27,833 INFO L93 Difference]: Finished difference Result 11260 states and 37286 transitions. [2021-05-22 02:53:27,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-22 02:53:27,833 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:53:27,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:27,849 INFO L225 Difference]: With dead ends: 11260 [2021-05-22 02:53:27,849 INFO L226 Difference]: Without dead ends: 11140 [2021-05-22 02:53:27,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1454.8ms TimeCoverageRelationStatistics Valid=424, Invalid=2126, Unknown=0, NotChecked=0, Total=2550 [2021-05-22 02:53:27,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11140 states. [2021-05-22 02:53:27,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11140 to 9907. [2021-05-22 02:53:27,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9907 states, 9906 states have (on average 3.354936402180497) internal successors, (33234), 9906 states have internal predecessors, (33234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:27,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9907 states to 9907 states and 33234 transitions. [2021-05-22 02:53:27,999 INFO L78 Accepts]: Start accepts. Automaton has 9907 states and 33234 transitions. Word has length 36 [2021-05-22 02:53:27,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:27,999 INFO L482 AbstractCegarLoop]: Abstraction has 9907 states and 33234 transitions. [2021-05-22 02:53:27,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:27,999 INFO L276 IsEmpty]: Start isEmpty. Operand 9907 states and 33234 transitions. [2021-05-22 02:53:28,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:53:28,010 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:28,010 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:28,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable732 [2021-05-22 02:53:28,211 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:28,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:28,211 INFO L82 PathProgramCache]: Analyzing trace with hash -442588443, now seen corresponding path program 89 times [2021-05-22 02:53:28,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:28,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657946893] [2021-05-22 02:53:28,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:28,509 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:28,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:28,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657946893] [2021-05-22 02:53:28,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657946893] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:28,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447255035] [2021-05-22 02:53:28,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:28,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:53:28,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:28,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-22 02:53:28,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:29,094 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:29,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447255035] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:29,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:29,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-22 02:53:29,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203064243] [2021-05-22 02:53:29,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:53:29,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:29,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:53:29,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1137, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:53:29,095 INFO L87 Difference]: Start difference. First operand 9907 states and 33234 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:30,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:30,830 INFO L93 Difference]: Finished difference Result 12217 states and 40114 transitions. [2021-05-22 02:53:30,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-22 02:53:30,831 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:53:30,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:30,885 INFO L225 Difference]: With dead ends: 12217 [2021-05-22 02:53:30,885 INFO L226 Difference]: Without dead ends: 12163 [2021-05-22 02:53:30,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1665.5ms TimeCoverageRelationStatistics Valid=607, Invalid=3175, Unknown=0, NotChecked=0, Total=3782 [2021-05-22 02:53:30,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12163 states. [2021-05-22 02:53:31,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12163 to 10085. [2021-05-22 02:53:31,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10085 states, 10084 states have (on average 3.347084490281634) internal successors, (33752), 10084 states have internal predecessors, (33752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:31,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10085 states to 10085 states and 33752 transitions. [2021-05-22 02:53:31,042 INFO L78 Accepts]: Start accepts. Automaton has 10085 states and 33752 transitions. Word has length 36 [2021-05-22 02:53:31,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:31,042 INFO L482 AbstractCegarLoop]: Abstraction has 10085 states and 33752 transitions. [2021-05-22 02:53:31,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:31,043 INFO L276 IsEmpty]: Start isEmpty. Operand 10085 states and 33752 transitions. [2021-05-22 02:53:31,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:53:31,054 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:31,054 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:31,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable743,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:31,255 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:31,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:31,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1280515611, now seen corresponding path program 90 times [2021-05-22 02:53:31,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:31,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819691409] [2021-05-22 02:53:31,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:31,469 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:31,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:31,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819691409] [2021-05-22 02:53:31,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819691409] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:31,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752273178] [2021-05-22 02:53:31,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:31,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:53:31,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:31,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:53:31,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:31,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752273178] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:31,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:31,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-22 02:53:31,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48812731] [2021-05-22 02:53:31,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:53:31,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:31,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:53:31,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:53:31,975 INFO L87 Difference]: Start difference. First operand 10085 states and 33752 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:34,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:34,269 INFO L93 Difference]: Finished difference Result 11554 states and 37757 transitions. [2021-05-22 02:53:34,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-22 02:53:34,269 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:53:34,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:34,285 INFO L225 Difference]: With dead ends: 11554 [2021-05-22 02:53:34,285 INFO L226 Difference]: Without dead ends: 11311 [2021-05-22 02:53:34,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 1792.7ms TimeCoverageRelationStatistics Valid=678, Invalid=4434, Unknown=0, NotChecked=0, Total=5112 [2021-05-22 02:53:34,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11311 states. [2021-05-22 02:53:34,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11311 to 10087. [2021-05-22 02:53:34,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10087 states, 10086 states have (on average 3.3471148126115406) internal successors, (33759), 10086 states have internal predecessors, (33759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:34,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10087 states to 10087 states and 33759 transitions. [2021-05-22 02:53:34,448 INFO L78 Accepts]: Start accepts. Automaton has 10087 states and 33759 transitions. Word has length 36 [2021-05-22 02:53:34,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:34,448 INFO L482 AbstractCegarLoop]: Abstraction has 10087 states and 33759 transitions. [2021-05-22 02:53:34,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:34,449 INFO L276 IsEmpty]: Start isEmpty. Operand 10087 states and 33759 transitions. [2021-05-22 02:53:34,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:53:34,461 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:34,461 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:34,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable747,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:34,669 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:34,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:34,670 INFO L82 PathProgramCache]: Analyzing trace with hash -764508959, now seen corresponding path program 91 times [2021-05-22 02:53:34,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:34,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403851268] [2021-05-22 02:53:34,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:34,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:34,956 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:34,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:34,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403851268] [2021-05-22 02:53:34,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403851268] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:34,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135753655] [2021-05-22 02:53:34,957 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:34,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:34,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:53:34,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:35,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135753655] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:35,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:35,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-22 02:53:35,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793714907] [2021-05-22 02:53:35,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:53:35,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:35,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:53:35,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:53:35,582 INFO L87 Difference]: Start difference. First operand 10087 states and 33759 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:37,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:37,315 INFO L93 Difference]: Finished difference Result 12818 states and 41972 transitions. [2021-05-22 02:53:37,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-22 02:53:37,316 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:53:37,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:37,336 INFO L225 Difference]: With dead ends: 12818 [2021-05-22 02:53:37,336 INFO L226 Difference]: Without dead ends: 12721 [2021-05-22 02:53:37,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1663.5ms TimeCoverageRelationStatistics Valid=643, Invalid=3263, Unknown=0, NotChecked=0, Total=3906 [2021-05-22 02:53:37,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12721 states. [2021-05-22 02:53:37,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12721 to 10131. [2021-05-22 02:53:37,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10131 states, 10130 states have (on average 3.3490621915103653) internal successors, (33926), 10130 states have internal predecessors, (33926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:37,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10131 states to 10131 states and 33926 transitions. [2021-05-22 02:53:37,539 INFO L78 Accepts]: Start accepts. Automaton has 10131 states and 33926 transitions. Word has length 36 [2021-05-22 02:53:37,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:37,539 INFO L482 AbstractCegarLoop]: Abstraction has 10131 states and 33926 transitions. [2021-05-22 02:53:37,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:37,539 INFO L276 IsEmpty]: Start isEmpty. Operand 10131 states and 33926 transitions. [2021-05-22 02:53:37,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:53:37,551 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:37,551 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:37,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-05-22 02:53:37,751 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:37,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:37,751 INFO L82 PathProgramCache]: Analyzing trace with hash 2014469349, now seen corresponding path program 92 times [2021-05-22 02:53:37,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:37,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704201603] [2021-05-22 02:53:37,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:38,073 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:38,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:38,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704201603] [2021-05-22 02:53:38,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704201603] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:38,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864761762] [2021-05-22 02:53:38,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:38,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:53:38,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:38,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:53:38,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:38,652 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:38,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864761762] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:38,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:38,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-05-22 02:53:38,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104139730] [2021-05-22 02:53:38,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:53:38,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:38,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:53:38,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:53:38,653 INFO L87 Difference]: Start difference. First operand 10131 states and 33926 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:41,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:41,676 INFO L93 Difference]: Finished difference Result 16789 states and 53924 transitions. [2021-05-22 02:53:41,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-22 02:53:41,676 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:53:41,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:41,702 INFO L225 Difference]: With dead ends: 16789 [2021-05-22 02:53:41,703 INFO L226 Difference]: Without dead ends: 16675 [2021-05-22 02:53:41,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2120 ImplicationChecksByTransitivity, 2578.8ms TimeCoverageRelationStatistics Valid=1240, Invalid=5566, Unknown=0, NotChecked=0, Total=6806 [2021-05-22 02:53:41,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16675 states. [2021-05-22 02:53:41,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16675 to 10145. [2021-05-22 02:53:41,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10145 states, 10144 states have (on average 3.3501577287066246) internal successors, (33984), 10144 states have internal predecessors, (33984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:41,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10145 states to 10145 states and 33984 transitions. [2021-05-22 02:53:41,900 INFO L78 Accepts]: Start accepts. Automaton has 10145 states and 33984 transitions. Word has length 36 [2021-05-22 02:53:41,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:41,900 INFO L482 AbstractCegarLoop]: Abstraction has 10145 states and 33984 transitions. [2021-05-22 02:53:41,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:41,900 INFO L276 IsEmpty]: Start isEmpty. Operand 10145 states and 33984 transitions. [2021-05-22 02:53:41,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:53:41,912 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:41,912 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:42,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable758 [2021-05-22 02:53:42,113 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:42,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:42,113 INFO L82 PathProgramCache]: Analyzing trace with hash -165738267, now seen corresponding path program 93 times [2021-05-22 02:53:42,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:42,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428008073] [2021-05-22 02:53:42,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:42,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:42,359 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:42,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:42,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428008073] [2021-05-22 02:53:42,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428008073] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:42,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5992340] [2021-05-22 02:53:42,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:42,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:53:42,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:42,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:53:42,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:42,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5992340] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:42,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:42,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2021-05-22 02:53:42,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357503389] [2021-05-22 02:53:42,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-22 02:53:42,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:42,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-22 02:53:42,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1208, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:53:42,903 INFO L87 Difference]: Start difference. First operand 10145 states and 33984 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:47,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:47,877 INFO L93 Difference]: Finished difference Result 15370 states and 49391 transitions. [2021-05-22 02:53:47,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-22 02:53:47,877 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:53:47,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:47,898 INFO L225 Difference]: With dead ends: 15370 [2021-05-22 02:53:47,898 INFO L226 Difference]: Without dead ends: 15103 [2021-05-22 02:53:47,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3790 ImplicationChecksByTransitivity, 3430.7ms TimeCoverageRelationStatistics Valid=1310, Invalid=10462, Unknown=0, NotChecked=0, Total=11772 [2021-05-22 02:53:47,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15103 states. [2021-05-22 02:53:48,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15103 to 10157. [2021-05-22 02:53:48,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10157 states, 10156 states have (on average 3.3509255612445843) internal successors, (34032), 10156 states have internal predecessors, (34032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:48,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10157 states to 10157 states and 34032 transitions. [2021-05-22 02:53:48,076 INFO L78 Accepts]: Start accepts. Automaton has 10157 states and 34032 transitions. Word has length 36 [2021-05-22 02:53:48,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:48,076 INFO L482 AbstractCegarLoop]: Abstraction has 10157 states and 34032 transitions. [2021-05-22 02:53:48,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:48,076 INFO L276 IsEmpty]: Start isEmpty. Operand 10157 states and 34032 transitions. [2021-05-22 02:53:48,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:53:48,087 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:48,087 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:48,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable768,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:48,288 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:48,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:48,288 INFO L82 PathProgramCache]: Analyzing trace with hash 2004453517, now seen corresponding path program 94 times [2021-05-22 02:53:48,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:48,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954541133] [2021-05-22 02:53:48,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:48,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:48,579 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:48,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:48,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954541133] [2021-05-22 02:53:48,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954541133] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:48,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024872577] [2021-05-22 02:53:48,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:48,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:53:48,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:48,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:53:48,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:49,193 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:49,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024872577] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:49,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:49,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-22 02:53:49,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268097858] [2021-05-22 02:53:49,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:53:49,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:49,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:53:49,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:53:49,194 INFO L87 Difference]: Start difference. First operand 10157 states and 34032 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:50,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:50,843 INFO L93 Difference]: Finished difference Result 12794 states and 41988 transitions. [2021-05-22 02:53:50,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-22 02:53:50,843 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:53:50,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:50,863 INFO L225 Difference]: With dead ends: 12794 [2021-05-22 02:53:50,863 INFO L226 Difference]: Without dead ends: 12713 [2021-05-22 02:53:50,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 1627.7ms TimeCoverageRelationStatistics Valid=597, Invalid=3185, Unknown=0, NotChecked=0, Total=3782 [2021-05-22 02:53:50,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12713 states. [2021-05-22 02:53:51,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12713 to 10237. [2021-05-22 02:53:51,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10237 states, 10236 states have (on average 3.34779210629152) internal successors, (34268), 10236 states have internal predecessors, (34268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:51,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10237 states to 10237 states and 34268 transitions. [2021-05-22 02:53:51,056 INFO L78 Accepts]: Start accepts. Automaton has 10237 states and 34268 transitions. Word has length 36 [2021-05-22 02:53:51,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:51,057 INFO L482 AbstractCegarLoop]: Abstraction has 10237 states and 34268 transitions. [2021-05-22 02:53:51,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:51,057 INFO L276 IsEmpty]: Start isEmpty. Operand 10237 states and 34268 transitions. [2021-05-22 02:53:51,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:53:51,068 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:51,068 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:51,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable772 [2021-05-22 02:53:51,269 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:51,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:51,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1166526349, now seen corresponding path program 95 times [2021-05-22 02:53:51,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:51,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850948356] [2021-05-22 02:53:51,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:51,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:51,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850948356] [2021-05-22 02:53:51,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850948356] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:51,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818360603] [2021-05-22 02:53:51,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:51,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:53:51,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:51,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:53:51,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:51,998 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:51,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818360603] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:51,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:51,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-22 02:53:51,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614079306] [2021-05-22 02:53:51,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:53:51,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:51,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:53:51,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:53:51,999 INFO L87 Difference]: Start difference. First operand 10237 states and 34268 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:53,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:53,787 INFO L93 Difference]: Finished difference Result 11288 states and 37070 transitions. [2021-05-22 02:53:53,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-22 02:53:53,788 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:53:53,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:53,804 INFO L225 Difference]: With dead ends: 11288 [2021-05-22 02:53:53,804 INFO L226 Difference]: Without dead ends: 11112 [2021-05-22 02:53:53,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 1633.9ms TimeCoverageRelationStatistics Valid=767, Invalid=4063, Unknown=0, NotChecked=0, Total=4830 [2021-05-22 02:53:53,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11112 states. [2021-05-22 02:53:53,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11112 to 10185. [2021-05-22 02:53:53,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10185 states, 10184 states have (on average 3.3521209740769833) internal successors, (34138), 10184 states have internal predecessors, (34138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:54,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10185 states to 10185 states and 34138 transitions. [2021-05-22 02:53:54,001 INFO L78 Accepts]: Start accepts. Automaton has 10185 states and 34138 transitions. Word has length 36 [2021-05-22 02:53:54,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:54,002 INFO L482 AbstractCegarLoop]: Abstraction has 10185 states and 34138 transitions. [2021-05-22 02:53:54,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:54,002 INFO L276 IsEmpty]: Start isEmpty. Operand 10185 states and 34138 transitions. [2021-05-22 02:53:54,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:53:54,013 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:54,013 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:54,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable782,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:54,214 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:54,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:54,214 INFO L82 PathProgramCache]: Analyzing trace with hash 488464529, now seen corresponding path program 96 times [2021-05-22 02:53:54,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:54,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133695248] [2021-05-22 02:53:54,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:54,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:54,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:54,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133695248] [2021-05-22 02:53:54,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133695248] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:54,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844783185] [2021-05-22 02:53:54,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:54,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:53:54,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:54,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:53:54,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:55,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844783185] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:55,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:55,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-05-22 02:53:55,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037575956] [2021-05-22 02:53:55,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:53:55,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:55,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:53:55,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:53:55,134 INFO L87 Difference]: Start difference. First operand 10185 states and 34138 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:58,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:58,654 INFO L93 Difference]: Finished difference Result 17253 states and 55366 transitions. [2021-05-22 02:53:58,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-22 02:53:58,654 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:53:58,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:58,680 INFO L225 Difference]: With dead ends: 17253 [2021-05-22 02:53:58,680 INFO L226 Difference]: Without dead ends: 17139 [2021-05-22 02:53:58,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2656 ImplicationChecksByTransitivity, 3312.4ms TimeCoverageRelationStatistics Valid=1416, Invalid=6774, Unknown=0, NotChecked=0, Total=8190 [2021-05-22 02:53:58,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17139 states. [2021-05-22 02:53:58,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17139 to 10201. [2021-05-22 02:53:58,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10201 states, 10200 states have (on average 3.3519607843137256) internal successors, (34190), 10200 states have internal predecessors, (34190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:58,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10201 states to 10201 states and 34190 transitions. [2021-05-22 02:53:58,874 INFO L78 Accepts]: Start accepts. Automaton has 10201 states and 34190 transitions. Word has length 36 [2021-05-22 02:53:58,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:58,874 INFO L482 AbstractCegarLoop]: Abstraction has 10201 states and 34190 transitions. [2021-05-22 02:53:58,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:58,874 INFO L276 IsEmpty]: Start isEmpty. Operand 10201 states and 34190 transitions. [2021-05-22 02:53:58,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:53:58,886 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:58,886 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:59,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable786,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:59,086 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:59,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:59,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1905948305, now seen corresponding path program 97 times [2021-05-22 02:53:59,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:59,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999121961] [2021-05-22 02:53:59,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:59,308 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:59,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:59,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999121961] [2021-05-22 02:53:59,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999121961] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:59,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126264494] [2021-05-22 02:53:59,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:59,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:59,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:53:59,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:59,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126264494] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:59,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:59,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-05-22 02:53:59,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550143714] [2021-05-22 02:53:59,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-22 02:53:59,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:59,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-22 02:53:59,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1184, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:53:59,842 INFO L87 Difference]: Start difference. First operand 10201 states and 34190 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:02,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:02,534 INFO L93 Difference]: Finished difference Result 15169 states and 48868 transitions. [2021-05-22 02:54:02,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-22 02:54:02,534 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:54:02,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:02,555 INFO L225 Difference]: With dead ends: 15169 [2021-05-22 02:54:02,555 INFO L226 Difference]: Without dead ends: 14937 [2021-05-22 02:54:02,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 2266.9ms TimeCoverageRelationStatistics Valid=1260, Invalid=6930, Unknown=0, NotChecked=0, Total=8190 [2021-05-22 02:54:02,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14937 states. [2021-05-22 02:54:02,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14937 to 10183. [2021-05-22 02:54:02,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10183 states, 10182 states have (on average 3.350815164014928) internal successors, (34118), 10182 states have internal predecessors, (34118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:02,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10183 states to 10183 states and 34118 transitions. [2021-05-22 02:54:02,723 INFO L78 Accepts]: Start accepts. Automaton has 10183 states and 34118 transitions. Word has length 36 [2021-05-22 02:54:02,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:02,723 INFO L482 AbstractCegarLoop]: Abstraction has 10183 states and 34118 transitions. [2021-05-22 02:54:02,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:02,723 INFO L276 IsEmpty]: Start isEmpty. Operand 10183 states and 34118 transitions. [2021-05-22 02:54:02,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:54:02,734 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:02,734 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:02,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable796 [2021-05-22 02:54:02,934 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:02,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:02,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1396525427, now seen corresponding path program 98 times [2021-05-22 02:54:02,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:02,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005552996] [2021-05-22 02:54:02,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:03,179 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:03,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:03,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005552996] [2021-05-22 02:54:03,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005552996] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:03,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514416496] [2021-05-22 02:54:03,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:03,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:54:03,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:54:03,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:54:03,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:03,690 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:03,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514416496] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:03,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:03,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-05-22 02:54:03,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207751240] [2021-05-22 02:54:03,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:54:03,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:03,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:54:03,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1107, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:54:03,691 INFO L87 Difference]: Start difference. First operand 10183 states and 34118 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:07,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:07,949 INFO L93 Difference]: Finished difference Result 16161 states and 51778 transitions. [2021-05-22 02:54:07,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-05-22 02:54:07,950 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:54:07,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:07,971 INFO L225 Difference]: With dead ends: 16161 [2021-05-22 02:54:07,971 INFO L226 Difference]: Without dead ends: 15902 [2021-05-22 02:54:07,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4003 ImplicationChecksByTransitivity, 3272.9ms TimeCoverageRelationStatistics Valid=1569, Invalid=10203, Unknown=0, NotChecked=0, Total=11772 [2021-05-22 02:54:07,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15902 states. [2021-05-22 02:54:08,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15902 to 10240. [2021-05-22 02:54:08,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10240 states, 10239 states have (on average 3.352378161929876) internal successors, (34325), 10239 states have internal predecessors, (34325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:08,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10240 states to 10240 states and 34325 transitions. [2021-05-22 02:54:08,153 INFO L78 Accepts]: Start accepts. Automaton has 10240 states and 34325 transitions. Word has length 36 [2021-05-22 02:54:08,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:08,153 INFO L482 AbstractCegarLoop]: Abstraction has 10240 states and 34325 transitions. [2021-05-22 02:54:08,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:08,153 INFO L276 IsEmpty]: Start isEmpty. Operand 10240 states and 34325 transitions. [2021-05-22 02:54:08,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:54:08,165 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:08,165 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:08,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable800 [2021-05-22 02:54:08,373 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:08,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:08,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1908589359, now seen corresponding path program 99 times [2021-05-22 02:54:08,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:08,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650813932] [2021-05-22 02:54:08,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:08,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:08,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650813932] [2021-05-22 02:54:08,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650813932] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:08,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802740459] [2021-05-22 02:54:08,698 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:08,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:54:08,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:54:08,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:54:08,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:09,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802740459] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:09,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:09,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-05-22 02:54:09,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676134313] [2021-05-22 02:54:09,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:54:09,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:09,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:54:09,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:54:09,246 INFO L87 Difference]: Start difference. First operand 10240 states and 34325 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:11,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:11,967 INFO L93 Difference]: Finished difference Result 19752 states and 64171 transitions. [2021-05-22 02:54:11,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-22 02:54:11,968 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:54:11,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:11,999 INFO L225 Difference]: With dead ends: 19752 [2021-05-22 02:54:11,999 INFO L226 Difference]: Without dead ends: 19608 [2021-05-22 02:54:11,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 2495.0ms TimeCoverageRelationStatistics Valid=1149, Invalid=4703, Unknown=0, NotChecked=0, Total=5852 [2021-05-22 02:54:12,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19608 states. [2021-05-22 02:54:12,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19608 to 10257. [2021-05-22 02:54:12,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10257 states, 10256 states have (on average 3.3517940717628707) internal successors, (34376), 10256 states have internal predecessors, (34376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:12,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10257 states to 10257 states and 34376 transitions. [2021-05-22 02:54:12,217 INFO L78 Accepts]: Start accepts. Automaton has 10257 states and 34376 transitions. Word has length 36 [2021-05-22 02:54:12,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:12,217 INFO L482 AbstractCegarLoop]: Abstraction has 10257 states and 34376 transitions. [2021-05-22 02:54:12,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:12,217 INFO L276 IsEmpty]: Start isEmpty. Operand 10257 states and 34376 transitions. [2021-05-22 02:54:12,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:54:12,229 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:12,229 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:12,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable804,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:12,430 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:12,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:12,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1183551919, now seen corresponding path program 100 times [2021-05-22 02:54:12,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:12,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58236925] [2021-05-22 02:54:12,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:12,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:12,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:12,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58236925] [2021-05-22 02:54:12,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58236925] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:12,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693400768] [2021-05-22 02:54:12,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:12,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:54:12,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:54:12,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:54:12,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:13,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693400768] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:13,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:13,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 02:54:13,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822593350] [2021-05-22 02:54:13,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:54:13,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:13,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:54:13,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:54:13,240 INFO L87 Difference]: Start difference. First operand 10257 states and 34376 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:14,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:14,666 INFO L93 Difference]: Finished difference Result 13308 states and 43782 transitions. [2021-05-22 02:54:14,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-22 02:54:14,667 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:54:14,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:14,686 INFO L225 Difference]: With dead ends: 13308 [2021-05-22 02:54:14,686 INFO L226 Difference]: Without dead ends: 13188 [2021-05-22 02:54:14,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 1378.4ms TimeCoverageRelationStatistics Valid=606, Invalid=2364, Unknown=0, NotChecked=0, Total=2970 [2021-05-22 02:54:14,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13188 states. [2021-05-22 02:54:14,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13188 to 10257. [2021-05-22 02:54:14,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10257 states, 10256 states have (on average 3.3517940717628707) internal successors, (34376), 10256 states have internal predecessors, (34376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:14,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10257 states to 10257 states and 34376 transitions. [2021-05-22 02:54:14,851 INFO L78 Accepts]: Start accepts. Automaton has 10257 states and 34376 transitions. Word has length 36 [2021-05-22 02:54:14,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:14,851 INFO L482 AbstractCegarLoop]: Abstraction has 10257 states and 34376 transitions. [2021-05-22 02:54:14,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:14,851 INFO L276 IsEmpty]: Start isEmpty. Operand 10257 states and 34376 transitions. [2021-05-22 02:54:14,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:54:14,862 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:14,862 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:15,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable811 [2021-05-22 02:54:15,063 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:15,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:15,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1538494053, now seen corresponding path program 101 times [2021-05-22 02:54:15,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:15,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687152125] [2021-05-22 02:54:15,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:15,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:15,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:15,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687152125] [2021-05-22 02:54:15,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687152125] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:15,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088627119] [2021-05-22 02:54:15,273 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:15,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:54:15,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:54:15,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:54:15,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:15,742 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:15,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088627119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:15,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:15,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-22 02:54:15,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967661296] [2021-05-22 02:54:15,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:54:15,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:15,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:54:15,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:54:15,743 INFO L87 Difference]: Start difference. First operand 10257 states and 34376 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:17,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:17,780 INFO L93 Difference]: Finished difference Result 12373 states and 40493 transitions. [2021-05-22 02:54:17,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-22 02:54:17,781 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:54:17,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:17,797 INFO L225 Difference]: With dead ends: 12373 [2021-05-22 02:54:17,797 INFO L226 Difference]: Without dead ends: 12120 [2021-05-22 02:54:17,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 1618.7ms TimeCoverageRelationStatistics Valid=802, Invalid=4028, Unknown=0, NotChecked=0, Total=4830 [2021-05-22 02:54:17,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12120 states. [2021-05-22 02:54:17,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12120 to 10415. [2021-05-22 02:54:17,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10415 states, 10414 states have (on average 3.3470328404071443) internal successors, (34856), 10414 states have internal predecessors, (34856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:17,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10415 states to 10415 states and 34856 transitions. [2021-05-22 02:54:17,956 INFO L78 Accepts]: Start accepts. Automaton has 10415 states and 34856 transitions. Word has length 36 [2021-05-22 02:54:17,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:17,956 INFO L482 AbstractCegarLoop]: Abstraction has 10415 states and 34856 transitions. [2021-05-22 02:54:17,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:17,957 INFO L276 IsEmpty]: Start isEmpty. Operand 10415 states and 34856 transitions. [2021-05-22 02:54:17,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:54:17,968 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:17,968 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:18,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable818,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:18,169 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:18,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:18,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1968113819, now seen corresponding path program 102 times [2021-05-22 02:54:18,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:18,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970075063] [2021-05-22 02:54:18,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:18,375 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:18,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:18,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970075063] [2021-05-22 02:54:18,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970075063] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:18,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743358128] [2021-05-22 02:54:18,375 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:18,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:54:18,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:54:18,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:54:18,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:18,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743358128] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:18,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:18,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-22 02:54:18,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609517268] [2021-05-22 02:54:18,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:54:18,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:18,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:54:18,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1026, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:54:18,873 INFO L87 Difference]: Start difference. First operand 10415 states and 34856 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:21,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:21,600 INFO L93 Difference]: Finished difference Result 15169 states and 48898 transitions. [2021-05-22 02:54:21,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-22 02:54:21,600 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:54:21,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:21,621 INFO L225 Difference]: With dead ends: 15169 [2021-05-22 02:54:21,621 INFO L226 Difference]: Without dead ends: 14971 [2021-05-22 02:54:21,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1915 ImplicationChecksByTransitivity, 2121.5ms TimeCoverageRelationStatistics Valid=1076, Invalid=5244, Unknown=0, NotChecked=0, Total=6320 [2021-05-22 02:54:21,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14971 states. [2021-05-22 02:54:21,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14971 to 10452. [2021-05-22 02:54:21,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10452 states, 10451 states have (on average 3.348579083341307) internal successors, (34996), 10451 states have internal predecessors, (34996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:21,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10452 states to 10452 states and 34996 transitions. [2021-05-22 02:54:21,799 INFO L78 Accepts]: Start accepts. Automaton has 10452 states and 34996 transitions. Word has length 36 [2021-05-22 02:54:21,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:21,799 INFO L482 AbstractCegarLoop]: Abstraction has 10452 states and 34996 transitions. [2021-05-22 02:54:21,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:21,800 INFO L276 IsEmpty]: Start isEmpty. Operand 10452 states and 34996 transitions. [2021-05-22 02:54:21,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:54:21,811 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:21,811 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:22,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable820 [2021-05-22 02:54:22,012 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:22,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:22,012 INFO L82 PathProgramCache]: Analyzing trace with hash 297320461, now seen corresponding path program 103 times [2021-05-22 02:54:22,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:22,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38540124] [2021-05-22 02:54:22,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:22,231 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:22,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:22,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38540124] [2021-05-22 02:54:22,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38540124] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:22,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789605835] [2021-05-22 02:54:22,231 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:22,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:22,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:54:22,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:22,733 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:22,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789605835] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:22,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:22,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-22 02:54:22,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714981239] [2021-05-22 02:54:22,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:54:22,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:22,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:54:22,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1090, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:54:22,734 INFO L87 Difference]: Start difference. First operand 10452 states and 34996 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:25,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:25,002 INFO L93 Difference]: Finished difference Result 15726 states and 50688 transitions. [2021-05-22 02:54:25,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-22 02:54:25,003 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:54:25,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:25,026 INFO L225 Difference]: With dead ends: 15726 [2021-05-22 02:54:25,026 INFO L226 Difference]: Without dead ends: 15524 [2021-05-22 02:54:25,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1879 ImplicationChecksByTransitivity, 2072.2ms TimeCoverageRelationStatistics Valid=1127, Invalid=5035, Unknown=0, NotChecked=0, Total=6162 [2021-05-22 02:54:25,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15524 states. [2021-05-22 02:54:25,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15524 to 10429. [2021-05-22 02:54:25,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10429 states, 10428 states have (on average 3.3469505178365937) internal successors, (34902), 10428 states have internal predecessors, (34902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:25,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10429 states to 10429 states and 34902 transitions. [2021-05-22 02:54:25,221 INFO L78 Accepts]: Start accepts. Automaton has 10429 states and 34902 transitions. Word has length 36 [2021-05-22 02:54:25,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:25,221 INFO L482 AbstractCegarLoop]: Abstraction has 10429 states and 34902 transitions. [2021-05-22 02:54:25,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:25,221 INFO L276 IsEmpty]: Start isEmpty. Operand 10429 states and 34902 transitions. [2021-05-22 02:54:25,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:54:25,233 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:25,233 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:25,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable824,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:25,433 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:25,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:25,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1098339159, now seen corresponding path program 104 times [2021-05-22 02:54:25,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:25,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428869353] [2021-05-22 02:54:25,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:25,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:25,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428869353] [2021-05-22 02:54:25,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428869353] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:25,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830457240] [2021-05-22 02:54:25,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:25,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:54:25,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:54:25,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:54:25,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:26,124 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:26,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830457240] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:26,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:26,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-05-22 02:54:26,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548803156] [2021-05-22 02:54:26,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-22 02:54:26,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:26,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-22 02:54:26,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=953, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:54:26,125 INFO L87 Difference]: Start difference. First operand 10429 states and 34902 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:27,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:27,335 INFO L93 Difference]: Finished difference Result 11947 states and 39281 transitions. [2021-05-22 02:54:27,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-22 02:54:27,336 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:54:27,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:27,352 INFO L225 Difference]: With dead ends: 11947 [2021-05-22 02:54:27,352 INFO L226 Difference]: Without dead ends: 11754 [2021-05-22 02:54:27,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1236.0ms TimeCoverageRelationStatistics Valid=455, Invalid=2515, Unknown=0, NotChecked=0, Total=2970 [2021-05-22 02:54:27,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11754 states. [2021-05-22 02:54:27,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11754 to 10440. [2021-05-22 02:54:27,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10440 states, 10439 states have (on average 3.347830251939841) internal successors, (34948), 10439 states have internal predecessors, (34948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:27,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10440 states to 10440 states and 34948 transitions. [2021-05-22 02:54:27,512 INFO L78 Accepts]: Start accepts. Automaton has 10440 states and 34948 transitions. Word has length 36 [2021-05-22 02:54:27,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:27,513 INFO L482 AbstractCegarLoop]: Abstraction has 10440 states and 34948 transitions. [2021-05-22 02:54:27,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:27,513 INFO L276 IsEmpty]: Start isEmpty. Operand 10440 states and 34948 transitions. [2021-05-22 02:54:27,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:54:27,524 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:27,524 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:27,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable828,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:27,725 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:27,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:27,725 INFO L82 PathProgramCache]: Analyzing trace with hash -146066803, now seen corresponding path program 105 times [2021-05-22 02:54:27,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:27,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631162335] [2021-05-22 02:54:27,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:27,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:27,922 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:27,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:27,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631162335] [2021-05-22 02:54:27,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631162335] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:27,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252606441] [2021-05-22 02:54:27,923 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:27,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-22 02:54:27,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:54:27,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:54:27,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:28,399 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:28,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252606441] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:28,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:28,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-05-22 02:54:28,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408207629] [2021-05-22 02:54:28,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-22 02:54:28,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:28,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-22 02:54:28,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:54:28,400 INFO L87 Difference]: Start difference. First operand 10440 states and 34948 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:29,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:29,752 INFO L93 Difference]: Finished difference Result 17451 states and 57222 transitions. [2021-05-22 02:54:29,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-22 02:54:29,753 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:54:29,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:29,779 INFO L225 Difference]: With dead ends: 17451 [2021-05-22 02:54:29,779 INFO L226 Difference]: Without dead ends: 17371 [2021-05-22 02:54:29,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1099.9ms TimeCoverageRelationStatistics Valid=543, Invalid=2213, Unknown=0, NotChecked=0, Total=2756 [2021-05-22 02:54:29,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17371 states. [2021-05-22 02:54:29,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17371 to 10503. [2021-05-22 02:54:29,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10503 states, 10502 states have (on average 3.3498381260712247) internal successors, (35180), 10502 states have internal predecessors, (35180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:30,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10503 states to 10503 states and 35180 transitions. [2021-05-22 02:54:30,016 INFO L78 Accepts]: Start accepts. Automaton has 10503 states and 35180 transitions. Word has length 36 [2021-05-22 02:54:30,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:30,017 INFO L482 AbstractCegarLoop]: Abstraction has 10503 states and 35180 transitions. [2021-05-22 02:54:30,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:30,017 INFO L276 IsEmpty]: Start isEmpty. Operand 10503 states and 35180 transitions. [2021-05-22 02:54:30,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:54:30,028 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:30,028 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:30,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable833 [2021-05-22 02:54:30,229 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:30,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:30,229 INFO L82 PathProgramCache]: Analyzing trace with hash -533222687, now seen corresponding path program 106 times [2021-05-22 02:54:30,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:30,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154822546] [2021-05-22 02:54:30,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:30,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:30,430 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:30,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:30,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154822546] [2021-05-22 02:54:30,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154822546] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:30,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33801518] [2021-05-22 02:54:30,430 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:30,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:54:30,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:54:30,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:54:30,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:30,984 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:30,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33801518] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:30,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:30,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 02:54:30,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760151050] [2021-05-22 02:54:30,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:54:30,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:30,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:54:30,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:54:30,985 INFO L87 Difference]: Start difference. First operand 10503 states and 35180 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:32,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:32,685 INFO L93 Difference]: Finished difference Result 16343 states and 53660 transitions. [2021-05-22 02:54:32,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-22 02:54:32,685 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:54:32,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:32,711 INFO L225 Difference]: With dead ends: 16343 [2021-05-22 02:54:32,711 INFO L226 Difference]: Without dead ends: 16263 [2021-05-22 02:54:32,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 1414.3ms TimeCoverageRelationStatistics Valid=680, Invalid=2980, Unknown=0, NotChecked=0, Total=3660 [2021-05-22 02:54:32,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16263 states. [2021-05-22 02:54:32,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16263 to 10501. [2021-05-22 02:54:32,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10501 states, 10500 states have (on average 3.349904761904762) internal successors, (35174), 10500 states have internal predecessors, (35174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:32,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10501 states to 10501 states and 35174 transitions. [2021-05-22 02:54:32,975 INFO L78 Accepts]: Start accepts. Automaton has 10501 states and 35174 transitions. Word has length 36 [2021-05-22 02:54:32,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:32,975 INFO L482 AbstractCegarLoop]: Abstraction has 10501 states and 35174 transitions. [2021-05-22 02:54:32,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:32,975 INFO L276 IsEmpty]: Start isEmpty. Operand 10501 states and 35174 transitions. [2021-05-22 02:54:32,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:54:32,986 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:32,986 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:33,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable847,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:33,188 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:33,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:33,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1932805219, now seen corresponding path program 107 times [2021-05-22 02:54:33,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:33,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756647021] [2021-05-22 02:54:33,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:33,508 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:33,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:33,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756647021] [2021-05-22 02:54:33,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756647021] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:33,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510357418] [2021-05-22 02:54:33,509 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:33,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 02:54:33,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:54:33,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-22 02:54:33,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:34,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510357418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:34,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:34,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-22 02:54:34,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247071537] [2021-05-22 02:54:34,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:54:34,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:34,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:54:34,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1030, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:54:34,077 INFO L87 Difference]: Start difference. First operand 10501 states and 35174 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:37,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:37,129 INFO L93 Difference]: Finished difference Result 15923 states and 51600 transitions. [2021-05-22 02:54:37,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-22 02:54:37,129 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:54:37,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:37,151 INFO L225 Difference]: With dead ends: 15923 [2021-05-22 02:54:37,152 INFO L226 Difference]: Without dead ends: 15816 [2021-05-22 02:54:37,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2062 ImplicationChecksByTransitivity, 2508.3ms TimeCoverageRelationStatistics Valid=1124, Invalid=5682, Unknown=0, NotChecked=0, Total=6806 [2021-05-22 02:54:37,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15816 states. [2021-05-22 02:54:37,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15816 to 10595. [2021-05-22 02:54:37,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10595 states, 10594 states have (on average 3.35019822541061) internal successors, (35492), 10594 states have internal predecessors, (35492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:37,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10595 states to 10595 states and 35492 transitions. [2021-05-22 02:54:37,333 INFO L78 Accepts]: Start accepts. Automaton has 10595 states and 35492 transitions. Word has length 36 [2021-05-22 02:54:37,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:37,334 INFO L482 AbstractCegarLoop]: Abstraction has 10595 states and 35492 transitions. [2021-05-22 02:54:37,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:37,334 INFO L276 IsEmpty]: Start isEmpty. Operand 10595 states and 35492 transitions. [2021-05-22 02:54:37,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:54:37,345 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:37,345 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:37,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable861,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:37,546 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:37,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:37,546 INFO L82 PathProgramCache]: Analyzing trace with hash -648664159, now seen corresponding path program 108 times [2021-05-22 02:54:37,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:37,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844976288] [2021-05-22 02:54:37,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:37,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:37,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844976288] [2021-05-22 02:54:37,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844976288] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:37,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851196996] [2021-05-22 02:54:37,778 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:37,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:54:37,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:54:37,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:54:37,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:38,275 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:38,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851196996] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:38,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:38,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-05-22 02:54:38,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840168079] [2021-05-22 02:54:38,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:54:38,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:38,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:54:38,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:54:38,276 INFO L87 Difference]: Start difference. First operand 10595 states and 35492 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:42,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:42,125 INFO L93 Difference]: Finished difference Result 18637 states and 59259 transitions. [2021-05-22 02:54:42,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-22 02:54:42,125 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:54:42,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:42,150 INFO L225 Difference]: With dead ends: 18637 [2021-05-22 02:54:42,150 INFO L226 Difference]: Without dead ends: 18454 [2021-05-22 02:54:42,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2976 ImplicationChecksByTransitivity, 2889.0ms TimeCoverageRelationStatistics Valid=1482, Invalid=7830, Unknown=0, NotChecked=0, Total=9312 [2021-05-22 02:54:42,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18454 states. [2021-05-22 02:54:42,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18454 to 10613. [2021-05-22 02:54:42,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10613 states, 10612 states have (on average 3.3513004146249528) internal successors, (35564), 10612 states have internal predecessors, (35564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:42,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10613 states to 10613 states and 35564 transitions. [2021-05-22 02:54:42,359 INFO L78 Accepts]: Start accepts. Automaton has 10613 states and 35564 transitions. Word has length 36 [2021-05-22 02:54:42,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:42,359 INFO L482 AbstractCegarLoop]: Abstraction has 10613 states and 35564 transitions. [2021-05-22 02:54:42,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:42,360 INFO L276 IsEmpty]: Start isEmpty. Operand 10613 states and 35564 transitions. [2021-05-22 02:54:42,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:54:42,371 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:42,371 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:42,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable865 [2021-05-22 02:54:42,572 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:42,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:42,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1625491043, now seen corresponding path program 109 times [2021-05-22 02:54:42,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:42,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986638598] [2021-05-22 02:54:42,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:42,827 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:54:42,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:42,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986638598] [2021-05-22 02:54:42,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986638598] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:42,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141107825] [2021-05-22 02:54:42,828 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:42,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:54:42,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:43,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141107825] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:43,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:43,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-05-22 02:54:43,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865115354] [2021-05-22 02:54:43,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-22 02:54:43,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:43,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-22 02:54:43,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1127, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:54:43,444 INFO L87 Difference]: Start difference. First operand 10613 states and 35564 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:47,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:47,571 INFO L93 Difference]: Finished difference Result 18780 states and 59813 transitions. [2021-05-22 02:54:47,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-22 02:54:47,571 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:54:47,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:47,596 INFO L225 Difference]: With dead ends: 18780 [2021-05-22 02:54:47,596 INFO L226 Difference]: Without dead ends: 18608 [2021-05-22 02:54:47,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3152 ImplicationChecksByTransitivity, 3087.8ms TimeCoverageRelationStatistics Valid=1714, Invalid=8186, Unknown=0, NotChecked=0, Total=9900 [2021-05-22 02:54:47,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18608 states. [2021-05-22 02:54:47,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18608 to 10593. [2021-05-22 02:54:47,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10593 states, 10592 states have (on average 3.3500755287009065) internal successors, (35484), 10592 states have internal predecessors, (35484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:47,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10593 states to 10593 states and 35484 transitions. [2021-05-22 02:54:47,805 INFO L78 Accepts]: Start accepts. Automaton has 10593 states and 35484 transitions. Word has length 36 [2021-05-22 02:54:47,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:47,805 INFO L482 AbstractCegarLoop]: Abstraction has 10593 states and 35484 transitions. [2021-05-22 02:54:47,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:47,805 INFO L276 IsEmpty]: Start isEmpty. Operand 10593 states and 35484 transitions. [2021-05-22 02:54:47,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:54:47,817 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:47,817 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:48,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable869,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:48,021 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:48,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:48,021 INFO L82 PathProgramCache]: Analyzing trace with hash 455377993, now seen corresponding path program 110 times [2021-05-22 02:54:48,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:48,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883989309] [2021-05-22 02:54:48,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:48,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:48,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:48,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883989309] [2021-05-22 02:54:48,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883989309] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:48,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983419665] [2021-05-22 02:54:48,357 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:48,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:54:48,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:54:48,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:54:48,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:48,911 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:48,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983419665] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:48,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:48,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-05-22 02:54:48,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944396267] [2021-05-22 02:54:48,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:54:48,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:48,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:54:48,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:54:48,912 INFO L87 Difference]: Start difference. First operand 10593 states and 35484 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:51,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:51,226 INFO L93 Difference]: Finished difference Result 15959 states and 51655 transitions. [2021-05-22 02:54:51,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-22 02:54:51,226 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:54:51,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:51,249 INFO L225 Difference]: With dead ends: 15959 [2021-05-22 02:54:51,249 INFO L226 Difference]: Without dead ends: 15821 [2021-05-22 02:54:51,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 2120.4ms TimeCoverageRelationStatistics Valid=993, Invalid=4557, Unknown=0, NotChecked=0, Total=5550 [2021-05-22 02:54:51,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15821 states. [2021-05-22 02:54:51,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15821 to 10619. [2021-05-22 02:54:51,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10619 states, 10618 states have (on average 3.351290261819552) internal successors, (35584), 10618 states have internal predecessors, (35584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:51,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10619 states to 10619 states and 35584 transitions. [2021-05-22 02:54:51,425 INFO L78 Accepts]: Start accepts. Automaton has 10619 states and 35584 transitions. Word has length 36 [2021-05-22 02:54:51,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:51,425 INFO L482 AbstractCegarLoop]: Abstraction has 10619 states and 35584 transitions. [2021-05-22 02:54:51,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:51,425 INFO L276 IsEmpty]: Start isEmpty. Operand 10619 states and 35584 transitions. [2021-05-22 02:54:51,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:54:51,436 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:51,436 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:51,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable873 [2021-05-22 02:54:51,637 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:51,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:51,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1739519053, now seen corresponding path program 111 times [2021-05-22 02:54:51,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:51,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998443517] [2021-05-22 02:54:51,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:51,876 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:51,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:51,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998443517] [2021-05-22 02:54:51,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998443517] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:51,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674015950] [2021-05-22 02:54:51,876 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:51,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:54:51,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:54:51,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:54:51,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:52,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674015950] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:52,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:52,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-05-22 02:54:52,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548644019] [2021-05-22 02:54:52,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:54:52,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:52,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:54:52,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1077, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:54:52,375 INFO L87 Difference]: Start difference. First operand 10619 states and 35584 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:56,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:56,342 INFO L93 Difference]: Finished difference Result 18681 states and 59398 transitions. [2021-05-22 02:54:56,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-22 02:54:56,342 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:54:56,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:56,368 INFO L225 Difference]: With dead ends: 18681 [2021-05-22 02:54:56,368 INFO L226 Difference]: Without dead ends: 18498 [2021-05-22 02:54:56,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3138 ImplicationChecksByTransitivity, 2988.1ms TimeCoverageRelationStatistics Valid=1538, Invalid=8164, Unknown=0, NotChecked=0, Total=9702 [2021-05-22 02:54:56,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18498 states. [2021-05-22 02:54:56,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18498 to 10601. [2021-05-22 02:54:56,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10601 states, 10600 states have (on average 3.350188679245283) internal successors, (35512), 10600 states have internal predecessors, (35512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:56,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10601 states to 10601 states and 35512 transitions. [2021-05-22 02:54:56,604 INFO L78 Accepts]: Start accepts. Automaton has 10601 states and 35512 transitions. Word has length 36 [2021-05-22 02:54:56,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:56,604 INFO L482 AbstractCegarLoop]: Abstraction has 10601 states and 35512 transitions. [2021-05-22 02:54:56,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:56,604 INFO L276 IsEmpty]: Start isEmpty. Operand 10601 states and 35512 transitions. [2021-05-22 02:54:56,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:54:56,616 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:56,616 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:56,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable880,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:56,817 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:56,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:56,817 INFO L82 PathProgramCache]: Analyzing trace with hash 762692169, now seen corresponding path program 112 times [2021-05-22 02:54:56,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:56,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944989129] [2021-05-22 02:54:56,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:54:57,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:57,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944989129] [2021-05-22 02:54:57,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944989129] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:57,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44435811] [2021-05-22 02:54:57,049 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:57,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:54:57,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:54:57,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:54:57,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:57,601 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:57,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44435811] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:57,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:57,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-05-22 02:54:57,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860739412] [2021-05-22 02:54:57,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-22 02:54:57,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:57,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-22 02:54:57,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1135, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:54:57,602 INFO L87 Difference]: Start difference. First operand 10601 states and 35512 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:01,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:55:01,562 INFO L93 Difference]: Finished difference Result 18616 states and 59315 transitions. [2021-05-22 02:55:01,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-05-22 02:55:01,563 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:55:01,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:55:01,588 INFO L225 Difference]: With dead ends: 18616 [2021-05-22 02:55:01,588 INFO L226 Difference]: Without dead ends: 18444 [2021-05-22 02:55:01,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3537 ImplicationChecksByTransitivity, 3281.2ms TimeCoverageRelationStatistics Valid=1882, Invalid=9038, Unknown=0, NotChecked=0, Total=10920 [2021-05-22 02:55:01,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18444 states. [2021-05-22 02:55:01,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18444 to 10589. [2021-05-22 02:55:01,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10589 states, 10588 states have (on average 3.349452210049112) internal successors, (35464), 10588 states have internal predecessors, (35464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:01,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10589 states to 10589 states and 35464 transitions. [2021-05-22 02:55:01,808 INFO L78 Accepts]: Start accepts. Automaton has 10589 states and 35464 transitions. Word has length 36 [2021-05-22 02:55:01,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:55:01,809 INFO L482 AbstractCegarLoop]: Abstraction has 10589 states and 35464 transitions. [2021-05-22 02:55:01,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:01,809 INFO L276 IsEmpty]: Start isEmpty. Operand 10589 states and 35464 transitions. [2021-05-22 02:55:01,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:55:01,822 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:55:01,822 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:55:02,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable884 [2021-05-22 02:55:02,037 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:55:02,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:55:02,037 INFO L82 PathProgramCache]: Analyzing trace with hash -2003431283, now seen corresponding path program 113 times [2021-05-22 02:55:02,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:55:02,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465981468] [2021-05-22 02:55:02,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:55:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:02,423 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:02,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:55:02,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465981468] [2021-05-22 02:55:02,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465981468] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:02,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501000097] [2021-05-22 02:55:02,424 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:55:02,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 02:55:02,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:55:02,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-22 02:55:02,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:55:02,996 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:02,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501000097] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:02,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:55:02,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-22 02:55:02,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94030502] [2021-05-22 02:55:02,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:55:02,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:55:02,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:55:02,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1040, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:55:02,997 INFO L87 Difference]: Start difference. First operand 10589 states and 35464 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:06,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:55:06,337 INFO L93 Difference]: Finished difference Result 15850 states and 51407 transitions. [2021-05-22 02:55:06,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-22 02:55:06,338 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:55:06,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:55:06,363 INFO L225 Difference]: With dead ends: 15850 [2021-05-22 02:55:06,363 INFO L226 Difference]: Without dead ends: 15743 [2021-05-22 02:55:06,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2462 ImplicationChecksByTransitivity, 2999.8ms TimeCoverageRelationStatistics Valid=1239, Invalid=6593, Unknown=0, NotChecked=0, Total=7832 [2021-05-22 02:55:06,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15743 states. [2021-05-22 02:55:06,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15743 to 10615. [2021-05-22 02:55:06,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10615 states, 10614 states have (on average 3.3499152063312607) internal successors, (35556), 10614 states have internal predecessors, (35556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:06,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10615 states to 10615 states and 35556 transitions. [2021-05-22 02:55:06,575 INFO L78 Accepts]: Start accepts. Automaton has 10615 states and 35556 transitions. Word has length 36 [2021-05-22 02:55:06,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:55:06,575 INFO L482 AbstractCegarLoop]: Abstraction has 10615 states and 35556 transitions. [2021-05-22 02:55:06,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:06,575 INFO L276 IsEmpty]: Start isEmpty. Operand 10615 states and 35556 transitions. [2021-05-22 02:55:06,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:55:06,588 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:55:06,588 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:55:06,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable888 [2021-05-22 02:55:06,803 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:55:06,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:55:06,804 INFO L82 PathProgramCache]: Analyzing trace with hash -719290223, now seen corresponding path program 114 times [2021-05-22 02:55:06,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:55:06,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126740336] [2021-05-22 02:55:06,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:55:06,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:07,095 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:07,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:55:07,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126740336] [2021-05-22 02:55:07,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126740336] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:07,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803794672] [2021-05-22 02:55:07,096 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:55:07,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:55:07,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:55:07,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:55:07,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:55:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:07,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803794672] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:07,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:55:07,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-05-22 02:55:07,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602763633] [2021-05-22 02:55:07,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:55:07,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:55:07,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:55:07,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:55:07,653 INFO L87 Difference]: Start difference. First operand 10615 states and 35556 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:11,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:55:11,753 INFO L93 Difference]: Finished difference Result 18195 states and 57913 transitions. [2021-05-22 02:55:11,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-22 02:55:11,753 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:55:11,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:55:11,780 INFO L225 Difference]: With dead ends: 18195 [2021-05-22 02:55:11,780 INFO L226 Difference]: Without dead ends: 18012 [2021-05-22 02:55:11,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3598 ImplicationChecksByTransitivity, 3374.3ms TimeCoverageRelationStatistics Valid=1673, Invalid=9039, Unknown=0, NotChecked=0, Total=10712 [2021-05-22 02:55:11,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18012 states. [2021-05-22 02:55:11,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18012 to 10571. [2021-05-22 02:55:11,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10571 states, 10570 states have (on average 3.34720908230842) internal successors, (35380), 10570 states have internal predecessors, (35380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:11,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10571 states to 10571 states and 35380 transitions. [2021-05-22 02:55:11,991 INFO L78 Accepts]: Start accepts. Automaton has 10571 states and 35380 transitions. Word has length 36 [2021-05-22 02:55:11,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:55:11,992 INFO L482 AbstractCegarLoop]: Abstraction has 10571 states and 35380 transitions. [2021-05-22 02:55:11,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:11,992 INFO L276 IsEmpty]: Start isEmpty. Operand 10571 states and 35380 transitions. [2021-05-22 02:55:12,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:55:12,003 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:55:12,003 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:55:12,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable892 [2021-05-22 02:55:12,204 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:55:12,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:55:12,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1153774679, now seen corresponding path program 115 times [2021-05-22 02:55:12,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:55:12,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176890373] [2021-05-22 02:55:12,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:55:12,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:12,467 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:12,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:55:12,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176890373] [2021-05-22 02:55:12,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176890373] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:12,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904540370] [2021-05-22 02:55:12,467 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:55:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:12,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:55:12,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:55:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:13,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904540370] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:13,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:55:13,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 02:55:13,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769084153] [2021-05-22 02:55:13,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:55:13,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:55:13,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:55:13,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:55:13,201 INFO L87 Difference]: Start difference. First operand 10571 states and 35380 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:14,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:55:14,856 INFO L93 Difference]: Finished difference Result 12516 states and 41213 transitions. [2021-05-22 02:55:14,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-22 02:55:14,857 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:55:14,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:55:14,878 INFO L225 Difference]: With dead ends: 12516 [2021-05-22 02:55:14,878 INFO L226 Difference]: Without dead ends: 12391 [2021-05-22 02:55:14,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1604.5ms TimeCoverageRelationStatistics Valid=521, Invalid=2341, Unknown=0, NotChecked=0, Total=2862 [2021-05-22 02:55:14,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12391 states. [2021-05-22 02:55:15,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12391 to 10595. [2021-05-22 02:55:15,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10595 states, 10594 states have (on average 3.3475552199358125) internal successors, (35464), 10594 states have internal predecessors, (35464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:15,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10595 states to 10595 states and 35464 transitions. [2021-05-22 02:55:15,071 INFO L78 Accepts]: Start accepts. Automaton has 10595 states and 35464 transitions. Word has length 36 [2021-05-22 02:55:15,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:55:15,071 INFO L482 AbstractCegarLoop]: Abstraction has 10595 states and 35464 transitions. [2021-05-22 02:55:15,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:15,071 INFO L276 IsEmpty]: Start isEmpty. Operand 10595 states and 35464 transitions. [2021-05-22 02:55:15,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:55:15,084 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:55:15,085 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:55:15,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable896,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:55:15,300 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:55:15,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:55:15,300 INFO L82 PathProgramCache]: Analyzing trace with hash -232072539, now seen corresponding path program 116 times [2021-05-22 02:55:15,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:55:15,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112640198] [2021-05-22 02:55:15,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:55:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:15,556 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:15,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:55:15,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112640198] [2021-05-22 02:55:15,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112640198] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:15,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478732548] [2021-05-22 02:55:15,556 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:55:15,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:55:15,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:55:15,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:55:15,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:55:16,111 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:16,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478732548] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:16,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:55:16,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-05-22 02:55:16,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135713016] [2021-05-22 02:55:16,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-22 02:55:16,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:55:16,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-22 02:55:16,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:55:16,112 INFO L87 Difference]: Start difference. First operand 10595 states and 35464 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:17,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:55:17,372 INFO L93 Difference]: Finished difference Result 13270 states and 43440 transitions. [2021-05-22 02:55:17,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-22 02:55:17,372 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:55:17,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:55:17,393 INFO L225 Difference]: With dead ends: 13270 [2021-05-22 02:55:17,394 INFO L226 Difference]: Without dead ends: 13138 [2021-05-22 02:55:17,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1215.6ms TimeCoverageRelationStatistics Valid=523, Invalid=1927, Unknown=0, NotChecked=0, Total=2450 [2021-05-22 02:55:17,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13138 states. [2021-05-22 02:55:17,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13138 to 10585. [2021-05-22 02:55:17,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10585 states, 10584 states have (on average 3.3473167044595615) internal successors, (35428), 10584 states have internal predecessors, (35428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:17,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10585 states to 10585 states and 35428 transitions. [2021-05-22 02:55:17,589 INFO L78 Accepts]: Start accepts. Automaton has 10585 states and 35428 transitions. Word has length 36 [2021-05-22 02:55:17,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:55:17,589 INFO L482 AbstractCegarLoop]: Abstraction has 10585 states and 35428 transitions. [2021-05-22 02:55:17,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:17,589 INFO L276 IsEmpty]: Start isEmpty. Operand 10585 states and 35428 transitions. [2021-05-22 02:55:17,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:55:17,601 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:55:17,601 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:55:17,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable903 [2021-05-22 02:55:17,802 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:55:17,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:55:17,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1492112215, now seen corresponding path program 117 times [2021-05-22 02:55:17,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:55:17,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855381962] [2021-05-22 02:55:17,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:55:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:18,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:55:18,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855381962] [2021-05-22 02:55:18,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855381962] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:18,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120673504] [2021-05-22 02:55:18,048 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:55:18,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:55:18,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:55:18,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:55:18,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:55:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:18,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120673504] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:18,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:55:18,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-05-22 02:55:18,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051253649] [2021-05-22 02:55:18,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-22 02:55:18,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:55:18,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-22 02:55:18,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:55:18,520 INFO L87 Difference]: Start difference. First operand 10585 states and 35428 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:19,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:55:19,924 INFO L93 Difference]: Finished difference Result 12032 states and 39573 transitions. [2021-05-22 02:55:19,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-22 02:55:19,925 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:55:19,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:55:19,942 INFO L225 Difference]: With dead ends: 12032 [2021-05-22 02:55:19,942 INFO L226 Difference]: Without dead ends: 11839 [2021-05-22 02:55:19,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1213.5ms TimeCoverageRelationStatistics Valid=456, Invalid=2406, Unknown=0, NotChecked=0, Total=2862 [2021-05-22 02:55:19,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11839 states. [2021-05-22 02:55:20,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11839 to 10585. [2021-05-22 02:55:20,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10585 states, 10584 states have (on average 3.3473167044595615) internal successors, (35428), 10584 states have internal predecessors, (35428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:20,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10585 states to 10585 states and 35428 transitions. [2021-05-22 02:55:20,108 INFO L78 Accepts]: Start accepts. Automaton has 10585 states and 35428 transitions. Word has length 36 [2021-05-22 02:55:20,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:55:20,109 INFO L482 AbstractCegarLoop]: Abstraction has 10585 states and 35428 transitions. [2021-05-22 02:55:20,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:20,109 INFO L276 IsEmpty]: Start isEmpty. Operand 10585 states and 35428 transitions. [2021-05-22 02:55:20,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:55:20,120 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:55:20,121 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:55:20,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable913,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:55:20,321 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:55:20,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:55:20,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1727967773, now seen corresponding path program 118 times [2021-05-22 02:55:20,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:55:20,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611172114] [2021-05-22 02:55:20,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:55:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:20,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:55:20,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611172114] [2021-05-22 02:55:20,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611172114] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:20,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203065402] [2021-05-22 02:55:20,687 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:55:20,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:55:20,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:55:20,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:55:20,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:55:21,366 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:21,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203065402] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:21,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:55:21,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-22 02:55:21,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700459906] [2021-05-22 02:55:21,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:55:21,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:55:21,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:55:21,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:55:21,367 INFO L87 Difference]: Start difference. First operand 10585 states and 35428 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:24,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:55:24,733 INFO L93 Difference]: Finished difference Result 17457 states and 56009 transitions. [2021-05-22 02:55:24,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-22 02:55:24,734 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:55:24,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:55:24,758 INFO L225 Difference]: With dead ends: 17457 [2021-05-22 02:55:24,758 INFO L226 Difference]: Without dead ends: 17331 [2021-05-22 02:55:24,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2319 ImplicationChecksByTransitivity, 2932.6ms TimeCoverageRelationStatistics Valid=1040, Invalid=6270, Unknown=0, NotChecked=0, Total=7310 [2021-05-22 02:55:24,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17331 states. [2021-05-22 02:55:24,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17331 to 10578. [2021-05-22 02:55:24,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10578 states, 10577 states have (on average 3.346222936560461) internal successors, (35393), 10577 states have internal predecessors, (35393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:24,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10578 states to 10578 states and 35393 transitions. [2021-05-22 02:55:24,955 INFO L78 Accepts]: Start accepts. Automaton has 10578 states and 35393 transitions. Word has length 36 [2021-05-22 02:55:24,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:55:24,955 INFO L482 AbstractCegarLoop]: Abstraction has 10578 states and 35393 transitions. [2021-05-22 02:55:24,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:24,955 INFO L276 IsEmpty]: Start isEmpty. Operand 10578 states and 35393 transitions. [2021-05-22 02:55:24,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:55:24,966 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:55:24,966 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:55:25,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable918,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:55:25,167 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:55:25,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:55:25,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1692290787, now seen corresponding path program 119 times [2021-05-22 02:55:25,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:55:25,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845443216] [2021-05-22 02:55:25,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:55:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:25,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:55:25,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845443216] [2021-05-22 02:55:25,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845443216] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:25,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048526906] [2021-05-22 02:55:25,503 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:55:25,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 02:55:25,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:55:25,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-22 02:55:25,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:55:26,061 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:26,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048526906] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:26,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:55:26,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-22 02:55:26,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906535216] [2021-05-22 02:55:26,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:55:26,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:55:26,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:55:26,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:55:26,062 INFO L87 Difference]: Start difference. First operand 10578 states and 35393 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:29,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:55:29,182 INFO L93 Difference]: Finished difference Result 16840 states and 54057 transitions. [2021-05-22 02:55:29,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-22 02:55:29,182 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:55:29,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:55:29,206 INFO L225 Difference]: With dead ends: 16840 [2021-05-22 02:55:29,206 INFO L226 Difference]: Without dead ends: 16751 [2021-05-22 02:55:29,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 2604.6ms TimeCoverageRelationStatistics Valid=885, Invalid=5757, Unknown=0, NotChecked=0, Total=6642 [2021-05-22 02:55:29,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16751 states. [2021-05-22 02:55:29,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16751 to 10636. [2021-05-22 02:55:29,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10636 states, 10635 states have (on average 3.3441466854724964) internal successors, (35565), 10635 states have internal predecessors, (35565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:29,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10636 states to 10636 states and 35565 transitions. [2021-05-22 02:55:29,407 INFO L78 Accepts]: Start accepts. Automaton has 10636 states and 35565 transitions. Word has length 36 [2021-05-22 02:55:29,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:55:29,407 INFO L482 AbstractCegarLoop]: Abstraction has 10636 states and 35565 transitions. [2021-05-22 02:55:29,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:29,408 INFO L276 IsEmpty]: Start isEmpty. Operand 10636 states and 35565 transitions. [2021-05-22 02:55:29,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:55:29,419 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:55:29,420 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:55:29,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable929 [2021-05-22 02:55:29,620 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:55:29,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:55:29,620 INFO L82 PathProgramCache]: Analyzing trace with hash -204015587, now seen corresponding path program 120 times [2021-05-22 02:55:29,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:55:29,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368443788] [2021-05-22 02:55:29,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:55:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:29,844 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:29,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:55:29,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368443788] [2021-05-22 02:55:29,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368443788] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:29,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070695018] [2021-05-22 02:55:29,844 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:55:29,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:55:29,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:55:29,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:55:29,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:55:30,358 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:30,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070695018] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:30,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:55:30,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-22 02:55:30,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629580515] [2021-05-22 02:55:30,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:55:30,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:55:30,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:55:30,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:55:30,359 INFO L87 Difference]: Start difference. First operand 10636 states and 35565 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:35,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:55:35,219 INFO L93 Difference]: Finished difference Result 18038 states and 57489 transitions. [2021-05-22 02:55:35,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-05-22 02:55:35,220 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:55:35,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:55:35,243 INFO L225 Difference]: With dead ends: 18038 [2021-05-22 02:55:35,243 INFO L226 Difference]: Without dead ends: 17807 [2021-05-22 02:55:35,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4193 ImplicationChecksByTransitivity, 3501.6ms TimeCoverageRelationStatistics Valid=1396, Invalid=10814, Unknown=0, NotChecked=0, Total=12210 [2021-05-22 02:55:35,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17807 states. [2021-05-22 02:55:35,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17807 to 10618. [2021-05-22 02:55:35,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10618 states, 10617 states have (on average 3.34265800131864) internal successors, (35489), 10617 states have internal predecessors, (35489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:35,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10618 states to 10618 states and 35489 transitions. [2021-05-22 02:55:35,437 INFO L78 Accepts]: Start accepts. Automaton has 10618 states and 35489 transitions. Word has length 36 [2021-05-22 02:55:35,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:55:35,437 INFO L482 AbstractCegarLoop]: Abstraction has 10618 states and 35489 transitions. [2021-05-22 02:55:35,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:35,438 INFO L276 IsEmpty]: Start isEmpty. Operand 10618 states and 35489 transitions. [2021-05-22 02:55:35,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:55:35,450 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:55:35,450 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:55:35,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable933,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:55:35,651 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:55:35,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:55:35,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1384976611, now seen corresponding path program 121 times [2021-05-22 02:55:35,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:55:35,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352372522] [2021-05-22 02:55:35,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:55:35,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:35,883 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:55:35,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:55:35,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352372522] [2021-05-22 02:55:35,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352372522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:35,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929663236] [2021-05-22 02:55:35,883 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:55:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:35,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:55:35,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:55:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:36,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929663236] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:36,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:55:36,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-22 02:55:36,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139770973] [2021-05-22 02:55:36,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:55:36,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:55:36,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:55:36,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:55:36,453 INFO L87 Difference]: Start difference. First operand 10618 states and 35489 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:41,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:55:41,853 INFO L93 Difference]: Finished difference Result 20257 states and 64198 transitions. [2021-05-22 02:55:41,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-05-22 02:55:41,853 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:55:41,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:55:41,879 INFO L225 Difference]: With dead ends: 20257 [2021-05-22 02:55:41,880 INFO L226 Difference]: Without dead ends: 20085 [2021-05-22 02:55:41,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4405 ImplicationChecksByTransitivity, 3875.9ms TimeCoverageRelationStatistics Valid=1962, Invalid=10920, Unknown=0, NotChecked=0, Total=12882 [2021-05-22 02:55:41,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20085 states. [2021-05-22 02:55:42,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20085 to 10608. [2021-05-22 02:55:42,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10608 states, 10607 states have (on average 3.342038276609786) internal successors, (35449), 10607 states have internal predecessors, (35449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:42,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10608 states to 10608 states and 35449 transitions. [2021-05-22 02:55:42,097 INFO L78 Accepts]: Start accepts. Automaton has 10608 states and 35449 transitions. Word has length 36 [2021-05-22 02:55:42,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:55:42,097 INFO L482 AbstractCegarLoop]: Abstraction has 10608 states and 35449 transitions. [2021-05-22 02:55:42,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:42,097 INFO L276 IsEmpty]: Start isEmpty. Operand 10608 states and 35449 transitions. [2021-05-22 02:55:42,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:55:42,109 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:55:42,109 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:55:42,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable937,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:55:42,309 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:55:42,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:55:42,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1831718969, now seen corresponding path program 122 times [2021-05-22 02:55:42,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:55:42,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578828709] [2021-05-22 02:55:42,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:55:42,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:42,619 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:42,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:55:42,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578828709] [2021-05-22 02:55:42,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578828709] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:42,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354277565] [2021-05-22 02:55:42,619 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:55:42,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:55:42,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:55:42,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:55:42,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:55:43,259 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:43,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354277565] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:43,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:55:43,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-05-22 02:55:43,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6137943] [2021-05-22 02:55:43,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:55:43,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:55:43,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:55:43,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:55:43,260 INFO L87 Difference]: Start difference. First operand 10608 states and 35449 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:45,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:55:45,010 INFO L93 Difference]: Finished difference Result 12348 states and 40169 transitions. [2021-05-22 02:55:45,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-22 02:55:45,010 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:55:45,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:55:45,028 INFO L225 Difference]: With dead ends: 12348 [2021-05-22 02:55:45,028 INFO L226 Difference]: Without dead ends: 12234 [2021-05-22 02:55:45,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1620.6ms TimeCoverageRelationStatistics Valid=417, Invalid=2775, Unknown=0, NotChecked=0, Total=3192 [2021-05-22 02:55:45,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12234 states. [2021-05-22 02:55:45,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12234 to 10814. [2021-05-22 02:55:45,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10814 states, 10813 states have (on average 3.3427355960418015) internal successors, (36145), 10813 states have internal predecessors, (36145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:45,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10814 states to 10814 states and 36145 transitions. [2021-05-22 02:55:45,208 INFO L78 Accepts]: Start accepts. Automaton has 10814 states and 36145 transitions. Word has length 36 [2021-05-22 02:55:45,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:55:45,209 INFO L482 AbstractCegarLoop]: Abstraction has 10814 states and 36145 transitions. [2021-05-22 02:55:45,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:45,209 INFO L276 IsEmpty]: Start isEmpty. Operand 10814 states and 36145 transitions. [2021-05-22 02:55:45,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:55:45,221 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:55:45,221 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:55:45,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable941 [2021-05-22 02:55:45,421 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:55:45,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:55:45,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1596323637, now seen corresponding path program 123 times [2021-05-22 02:55:45,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:55:45,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002199174] [2021-05-22 02:55:45,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:55:45,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:45,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:55:45,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002199174] [2021-05-22 02:55:45,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002199174] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:45,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284572674] [2021-05-22 02:55:45,735 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:55:45,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:55:45,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:55:45,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:55:45,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:55:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:46,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284572674] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:46,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:55:46,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-05-22 02:55:46,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872937775] [2021-05-22 02:55:46,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:55:46,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:55:46,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:55:46,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:55:46,412 INFO L87 Difference]: Start difference. First operand 10814 states and 36145 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:50,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:55:50,142 INFO L93 Difference]: Finished difference Result 17464 states and 55985 transitions. [2021-05-22 02:55:50,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-22 02:55:50,143 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:55:50,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:55:50,168 INFO L225 Difference]: With dead ends: 17464 [2021-05-22 02:55:50,168 INFO L226 Difference]: Without dead ends: 17317 [2021-05-22 02:55:50,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2778 ImplicationChecksByTransitivity, 3221.2ms TimeCoverageRelationStatistics Valid=1345, Invalid=7211, Unknown=0, NotChecked=0, Total=8556 [2021-05-22 02:55:50,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17317 states. [2021-05-22 02:55:50,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17317 to 10979. [2021-05-22 02:55:50,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10979 states, 10978 states have (on average 3.344962652577883) internal successors, (36721), 10978 states have internal predecessors, (36721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:50,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10979 states to 10979 states and 36721 transitions. [2021-05-22 02:55:50,372 INFO L78 Accepts]: Start accepts. Automaton has 10979 states and 36721 transitions. Word has length 36 [2021-05-22 02:55:50,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:55:50,373 INFO L482 AbstractCegarLoop]: Abstraction has 10979 states and 36721 transitions. [2021-05-22 02:55:50,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:50,373 INFO L276 IsEmpty]: Start isEmpty. Operand 10979 states and 36721 transitions. [2021-05-22 02:55:50,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:55:50,385 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:55:50,385 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:55:50,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable950,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:55:50,586 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:55:50,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:55:50,586 INFO L82 PathProgramCache]: Analyzing trace with hash 676724705, now seen corresponding path program 124 times [2021-05-22 02:55:50,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:55:50,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615448103] [2021-05-22 02:55:50,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:55:50,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:50,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:55:50,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615448103] [2021-05-22 02:55:50,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615448103] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:50,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342767946] [2021-05-22 02:55:50,894 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:55:50,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:55:50,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:55:50,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:55:50,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:55:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:51,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342767946] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:51,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:55:51,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-22 02:55:51,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816923379] [2021-05-22 02:55:51,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:55:51,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:55:51,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:55:51,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:55:51,668 INFO L87 Difference]: Start difference. First operand 10979 states and 36721 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:53,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:55:53,073 INFO L93 Difference]: Finished difference Result 13498 states and 43973 transitions. [2021-05-22 02:55:53,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-22 02:55:53,073 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:55:53,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:55:53,093 INFO L225 Difference]: With dead ends: 13498 [2021-05-22 02:55:53,093 INFO L226 Difference]: Without dead ends: 13410 [2021-05-22 02:55:53,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1570.6ms TimeCoverageRelationStatistics Valid=463, Invalid=2843, Unknown=0, NotChecked=0, Total=3306 [2021-05-22 02:55:53,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13410 states. [2021-05-22 02:55:53,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13410 to 11003. [2021-05-22 02:55:53,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11003 states, 11002 states have (on average 3.3449372841301583) internal successors, (36801), 11002 states have internal predecessors, (36801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:53,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11003 states to 11003 states and 36801 transitions. [2021-05-22 02:55:53,262 INFO L78 Accepts]: Start accepts. Automaton has 11003 states and 36801 transitions. Word has length 36 [2021-05-22 02:55:53,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:55:53,262 INFO L482 AbstractCegarLoop]: Abstraction has 11003 states and 36801 transitions. [2021-05-22 02:55:53,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:53,262 INFO L276 IsEmpty]: Start isEmpty. Operand 11003 states and 36801 transitions. [2021-05-22 02:55:53,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:55:53,274 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:55:53,274 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:55:53,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable961 [2021-05-22 02:55:53,477 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:55:53,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:55:53,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1350521119, now seen corresponding path program 125 times [2021-05-22 02:55:53,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:55:53,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202636992] [2021-05-22 02:55:53,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:55:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:53,784 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:53,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:55:53,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202636992] [2021-05-22 02:55:53,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202636992] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:53,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537541394] [2021-05-22 02:55:53,784 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:55:53,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 02:55:53,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:55:53,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:55:53,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:55:54,764 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-05-22 02:55:54,901 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:54,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537541394] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:54,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:55:54,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-22 02:55:54,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224408609] [2021-05-22 02:55:54,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:55:54,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:55:54,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:55:54,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:55:54,902 INFO L87 Difference]: Start difference. First operand 11003 states and 36801 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:57,081 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-05-22 02:55:57,324 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-05-22 02:55:57,546 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-05-22 02:55:57,702 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2021-05-22 02:55:57,872 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-05-22 02:55:58,073 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-05-22 02:55:58,249 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2021-05-22 02:55:58,431 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-05-22 02:55:58,644 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2021-05-22 02:55:58,892 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-05-22 02:55:59,102 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2021-05-22 02:55:59,320 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2021-05-22 02:55:59,644 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2021-05-22 02:55:59,910 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 41 [2021-05-22 02:56:00,161 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 41 [2021-05-22 02:56:00,335 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 40 [2021-05-22 02:56:00,499 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 42 [2021-05-22 02:56:00,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:00,766 INFO L93 Difference]: Finished difference Result 17246 states and 55714 transitions. [2021-05-22 02:56:00,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-22 02:56:00,767 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:56:00,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:00,792 INFO L225 Difference]: With dead ends: 17246 [2021-05-22 02:56:00,792 INFO L226 Difference]: Without dead ends: 17157 [2021-05-22 02:56:00,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2874 ImplicationChecksByTransitivity, 5747.5ms TimeCoverageRelationStatistics Valid=1239, Invalid=7881, Unknown=0, NotChecked=0, Total=9120 [2021-05-22 02:56:00,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17157 states. [2021-05-22 02:56:00,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17157 to 11047. [2021-05-22 02:56:00,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11047 states, 11046 states have (on average 3.3455549520188304) internal successors, (36955), 11046 states have internal predecessors, (36955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:01,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11047 states to 11047 states and 36955 transitions. [2021-05-22 02:56:01,052 INFO L78 Accepts]: Start accepts. Automaton has 11047 states and 36955 transitions. Word has length 36 [2021-05-22 02:56:01,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:01,052 INFO L482 AbstractCegarLoop]: Abstraction has 11047 states and 36955 transitions. [2021-05-22 02:56:01,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:01,052 INFO L276 IsEmpty]: Start isEmpty. Operand 11047 states and 36955 transitions. [2021-05-22 02:56:01,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:56:01,064 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:01,064 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:01,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable972 [2021-05-22 02:56:01,269 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:01,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:01,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1828307351, now seen corresponding path program 126 times [2021-05-22 02:56:01,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:01,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952590935] [2021-05-22 02:56:01,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:01,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:01,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:01,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952590935] [2021-05-22 02:56:01,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952590935] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:01,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294449191] [2021-05-22 02:56:01,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:01,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:56:01,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:56:01,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:56:01,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:02,169 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:02,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294449191] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:02,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:02,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-05-22 02:56:02,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135186371] [2021-05-22 02:56:02,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-22 02:56:02,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:02,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-22 02:56:02,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=953, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:56:02,170 INFO L87 Difference]: Start difference. First operand 11047 states and 36955 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:03,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:03,914 INFO L93 Difference]: Finished difference Result 13682 states and 44967 transitions. [2021-05-22 02:56:03,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-22 02:56:03,914 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:56:03,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:03,935 INFO L225 Difference]: With dead ends: 13682 [2021-05-22 02:56:03,935 INFO L226 Difference]: Without dead ends: 13562 [2021-05-22 02:56:03,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1579.5ms TimeCoverageRelationStatistics Valid=518, Invalid=2904, Unknown=0, NotChecked=0, Total=3422 [2021-05-22 02:56:03,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13562 states. [2021-05-22 02:56:04,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13562 to 11055. [2021-05-22 02:56:04,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11055 states, 11054 states have (on average 3.345847656956758) internal successors, (36985), 11054 states have internal predecessors, (36985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:04,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11055 states to 11055 states and 36985 transitions. [2021-05-22 02:56:04,155 INFO L78 Accepts]: Start accepts. Automaton has 11055 states and 36985 transitions. Word has length 36 [2021-05-22 02:56:04,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:04,155 INFO L482 AbstractCegarLoop]: Abstraction has 11055 states and 36985 transitions. [2021-05-22 02:56:04,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:04,155 INFO L276 IsEmpty]: Start isEmpty. Operand 11055 states and 36985 transitions. [2021-05-22 02:56:04,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:56:04,167 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:04,167 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:04,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable989 [2021-05-22 02:56:04,368 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:04,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:04,368 INFO L82 PathProgramCache]: Analyzing trace with hash -555373643, now seen corresponding path program 127 times [2021-05-22 02:56:04,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:04,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859310360] [2021-05-22 02:56:04,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:04,657 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:04,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:04,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859310360] [2021-05-22 02:56:04,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859310360] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:04,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445158777] [2021-05-22 02:56:04,658 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:04,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:56:04,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:05,310 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:05,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445158777] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:05,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:05,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 02:56:05,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387330805] [2021-05-22 02:56:05,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:56:05,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:05,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:56:05,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:56:05,311 INFO L87 Difference]: Start difference. First operand 11055 states and 36985 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:06,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:06,998 INFO L93 Difference]: Finished difference Result 12746 states and 42062 transitions. [2021-05-22 02:56:06,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-22 02:56:06,998 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:56:06,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:07,017 INFO L225 Difference]: With dead ends: 12746 [2021-05-22 02:56:07,018 INFO L226 Difference]: Without dead ends: 12626 [2021-05-22 02:56:07,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1415.7ms TimeCoverageRelationStatistics Valid=403, Invalid=2353, Unknown=0, NotChecked=0, Total=2756 [2021-05-22 02:56:07,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12626 states. [2021-05-22 02:56:07,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12626 to 11067. [2021-05-22 02:56:07,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11067 states, 11066 states have (on average 3.345653352611603) internal successors, (37023), 11066 states have internal predecessors, (37023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:07,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11067 states to 11067 states and 37023 transitions. [2021-05-22 02:56:07,251 INFO L78 Accepts]: Start accepts. Automaton has 11067 states and 37023 transitions. Word has length 36 [2021-05-22 02:56:07,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:07,251 INFO L482 AbstractCegarLoop]: Abstraction has 11067 states and 37023 transitions. [2021-05-22 02:56:07,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:07,251 INFO L276 IsEmpty]: Start isEmpty. Operand 11067 states and 37023 transitions. [2021-05-22 02:56:07,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:56:07,263 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:07,263 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:07,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1000 [2021-05-22 02:56:07,463 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:07,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:07,464 INFO L82 PathProgramCache]: Analyzing trace with hash -625483679, now seen corresponding path program 128 times [2021-05-22 02:56:07,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:07,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989094368] [2021-05-22 02:56:07,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:07,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:07,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989094368] [2021-05-22 02:56:07,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989094368] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:07,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991952867] [2021-05-22 02:56:07,766 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:07,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:56:07,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:56:07,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:56:07,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:08,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991952867] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:08,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:08,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-05-22 02:56:08,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152380682] [2021-05-22 02:56:08,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-22 02:56:08,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:08,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-22 02:56:08,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:56:08,384 INFO L87 Difference]: Start difference. First operand 11067 states and 37023 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:09,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:09,511 INFO L93 Difference]: Finished difference Result 12421 states and 41125 transitions. [2021-05-22 02:56:09,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-22 02:56:09,511 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:56:09,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:09,529 INFO L225 Difference]: With dead ends: 12421 [2021-05-22 02:56:09,529 INFO L226 Difference]: Without dead ends: 12301 [2021-05-22 02:56:09,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1323.5ms TimeCoverageRelationStatistics Valid=392, Invalid=2058, Unknown=0, NotChecked=0, Total=2450 [2021-05-22 02:56:09,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12301 states. [2021-05-22 02:56:09,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12301 to 11071. [2021-05-22 02:56:09,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11071 states, 11070 states have (on average 3.345528455284553) internal successors, (37035), 11070 states have internal predecessors, (37035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:09,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11071 states to 11071 states and 37035 transitions. [2021-05-22 02:56:09,691 INFO L78 Accepts]: Start accepts. Automaton has 11071 states and 37035 transitions. Word has length 36 [2021-05-22 02:56:09,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:09,691 INFO L482 AbstractCegarLoop]: Abstraction has 11071 states and 37035 transitions. [2021-05-22 02:56:09,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:09,691 INFO L276 IsEmpty]: Start isEmpty. Operand 11071 states and 37035 transitions. [2021-05-22 02:56:09,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:56:09,703 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:09,703 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:09,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1012 [2021-05-22 02:56:09,904 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:09,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:09,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1410045579, now seen corresponding path program 129 times [2021-05-22 02:56:09,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:09,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250628721] [2021-05-22 02:56:09,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:09,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:10,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:10,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250628721] [2021-05-22 02:56:10,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250628721] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:10,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295102809] [2021-05-22 02:56:10,179 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:10,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:56:10,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:56:10,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:56:10,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:10,849 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:10,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295102809] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:10,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:10,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-05-22 02:56:10,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943836292] [2021-05-22 02:56:10,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:56:10,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:10,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:56:10,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=977, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:56:10,849 INFO L87 Difference]: Start difference. First operand 11071 states and 37035 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:13,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:13,320 INFO L93 Difference]: Finished difference Result 16445 states and 53005 transitions. [2021-05-22 02:56:13,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-22 02:56:13,320 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:56:13,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:13,345 INFO L225 Difference]: With dead ends: 16445 [2021-05-22 02:56:13,345 INFO L226 Difference]: Without dead ends: 16277 [2021-05-22 02:56:13,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 2252.6ms TimeCoverageRelationStatistics Valid=975, Invalid=4427, Unknown=0, NotChecked=0, Total=5402 [2021-05-22 02:56:13,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16277 states. [2021-05-22 02:56:13,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16277 to 11152. [2021-05-22 02:56:13,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11152 states, 11151 states have (on average 3.347861178369653) internal successors, (37332), 11151 states have internal predecessors, (37332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:13,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11152 states to 11152 states and 37332 transitions. [2021-05-22 02:56:13,570 INFO L78 Accepts]: Start accepts. Automaton has 11152 states and 37332 transitions. Word has length 36 [2021-05-22 02:56:13,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:13,570 INFO L482 AbstractCegarLoop]: Abstraction has 11152 states and 37332 transitions. [2021-05-22 02:56:13,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:13,570 INFO L276 IsEmpty]: Start isEmpty. Operand 11152 states and 37332 transitions. [2021-05-22 02:56:13,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:56:13,582 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:13,582 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:13,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1023 [2021-05-22 02:56:13,783 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:13,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:13,783 INFO L82 PathProgramCache]: Analyzing trace with hash 855388701, now seen corresponding path program 130 times [2021-05-22 02:56:13,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:13,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132825651] [2021-05-22 02:56:13,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:14,069 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:14,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:14,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132825651] [2021-05-22 02:56:14,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132825651] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:14,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351298474] [2021-05-22 02:56:14,069 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:14,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:56:14,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:56:14,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:56:14,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:14,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351298474] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:14,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:14,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-22 02:56:14,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103715578] [2021-05-22 02:56:14,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:56:14,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:14,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:56:14,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:56:14,719 INFO L87 Difference]: Start difference. First operand 11152 states and 37332 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:17,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:17,287 INFO L93 Difference]: Finished difference Result 16705 states and 53815 transitions. [2021-05-22 02:56:17,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-22 02:56:17,287 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:56:17,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:17,310 INFO L225 Difference]: With dead ends: 16705 [2021-05-22 02:56:17,310 INFO L226 Difference]: Without dead ends: 16527 [2021-05-22 02:56:17,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1679 ImplicationChecksByTransitivity, 2239.3ms TimeCoverageRelationStatistics Valid=958, Invalid=4444, Unknown=0, NotChecked=0, Total=5402 [2021-05-22 02:56:17,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16527 states. [2021-05-22 02:56:17,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16527 to 11192. [2021-05-22 02:56:17,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11192 states, 11191 states have (on average 3.348136895719775) internal successors, (37469), 11191 states have internal predecessors, (37469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:17,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11192 states to 11192 states and 37469 transitions. [2021-05-22 02:56:17,509 INFO L78 Accepts]: Start accepts. Automaton has 11192 states and 37469 transitions. Word has length 36 [2021-05-22 02:56:17,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:17,510 INFO L482 AbstractCegarLoop]: Abstraction has 11192 states and 37469 transitions. [2021-05-22 02:56:17,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:17,510 INFO L276 IsEmpty]: Start isEmpty. Operand 11192 states and 37469 transitions. [2021-05-22 02:56:17,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:56:17,522 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:17,522 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:17,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1034 [2021-05-22 02:56:17,722 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:17,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:17,723 INFO L82 PathProgramCache]: Analyzing trace with hash -963821215, now seen corresponding path program 131 times [2021-05-22 02:56:17,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:17,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107135304] [2021-05-22 02:56:17,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:17,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:18,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:18,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107135304] [2021-05-22 02:56:18,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107135304] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:18,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543824730] [2021-05-22 02:56:18,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:18,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-22 02:56:18,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:56:18,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:56:18,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:18,638 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:18,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543824730] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:18,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:18,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 02:56:18,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252699643] [2021-05-22 02:56:18,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:56:18,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:18,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:56:18,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:56:18,639 INFO L87 Difference]: Start difference. First operand 11192 states and 37469 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:19,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:19,773 INFO L93 Difference]: Finished difference Result 12536 states and 41555 transitions. [2021-05-22 02:56:19,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-22 02:56:19,773 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:56:19,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:19,791 INFO L225 Difference]: With dead ends: 12536 [2021-05-22 02:56:19,792 INFO L226 Difference]: Without dead ends: 12456 [2021-05-22 02:56:19,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1190.8ms TimeCoverageRelationStatistics Valid=321, Invalid=1841, Unknown=0, NotChecked=0, Total=2162 [2021-05-22 02:56:19,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12456 states. [2021-05-22 02:56:19,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12456 to 11180. [2021-05-22 02:56:19,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11180 states, 11179 states have (on average 3.3479738795956706) internal successors, (37427), 11179 states have internal predecessors, (37427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:19,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11180 states to 11180 states and 37427 transitions. [2021-05-22 02:56:19,984 INFO L78 Accepts]: Start accepts. Automaton has 11180 states and 37427 transitions. Word has length 36 [2021-05-22 02:56:19,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:19,984 INFO L482 AbstractCegarLoop]: Abstraction has 11180 states and 37427 transitions. [2021-05-22 02:56:19,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:19,985 INFO L276 IsEmpty]: Start isEmpty. Operand 11180 states and 37427 transitions. [2021-05-22 02:56:19,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:56:19,997 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:19,997 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:20,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1045,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:20,198 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:20,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:20,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1461646837, now seen corresponding path program 132 times [2021-05-22 02:56:20,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:20,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925590270] [2021-05-22 02:56:20,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:20,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:20,491 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:20,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:20,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925590270] [2021-05-22 02:56:20,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925590270] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:20,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120653377] [2021-05-22 02:56:20,491 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:20,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:56:20,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:56:20,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:56:20,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:21,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120653377] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:21,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:21,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-05-22 02:56:21,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391630768] [2021-05-22 02:56:21,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:56:21,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:21,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:56:21,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:56:21,051 INFO L87 Difference]: Start difference. First operand 11180 states and 37427 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:23,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:23,197 INFO L93 Difference]: Finished difference Result 14457 states and 47364 transitions. [2021-05-22 02:56:23,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-22 02:56:23,198 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:56:23,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:23,217 INFO L225 Difference]: With dead ends: 14457 [2021-05-22 02:56:23,217 INFO L226 Difference]: Without dead ends: 14337 [2021-05-22 02:56:23,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1682.7ms TimeCoverageRelationStatistics Valid=529, Invalid=3377, Unknown=0, NotChecked=0, Total=3906 [2021-05-22 02:56:23,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14337 states. [2021-05-22 02:56:23,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14337 to 11250. [2021-05-22 02:56:23,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11250 states, 11249 states have (on average 3.345808516312561) internal successors, (37637), 11249 states have internal predecessors, (37637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:23,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11250 states to 11250 states and 37637 transitions. [2021-05-22 02:56:23,393 INFO L78 Accepts]: Start accepts. Automaton has 11250 states and 37637 transitions. Word has length 36 [2021-05-22 02:56:23,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:23,393 INFO L482 AbstractCegarLoop]: Abstraction has 11250 states and 37637 transitions. [2021-05-22 02:56:23,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:23,393 INFO L276 IsEmpty]: Start isEmpty. Operand 11250 states and 37637 transitions. [2021-05-22 02:56:23,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:56:23,406 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:23,406 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:23,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1050,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:23,606 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:23,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:23,607 INFO L82 PathProgramCache]: Analyzing trace with hash 623719669, now seen corresponding path program 133 times [2021-05-22 02:56:23,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:23,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137343447] [2021-05-22 02:56:23,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:23,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:23,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137343447] [2021-05-22 02:56:23,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137343447] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:23,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122451606] [2021-05-22 02:56:23,819 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:23,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:56:23,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:24,360 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:24,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122451606] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:24,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:24,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-22 02:56:24,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054709888] [2021-05-22 02:56:24,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:56:24,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:24,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:56:24,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:56:24,361 INFO L87 Difference]: Start difference. First operand 11250 states and 37637 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:25,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:25,980 INFO L93 Difference]: Finished difference Result 12509 states and 40981 transitions. [2021-05-22 02:56:25,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-22 02:56:25,981 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:56:25,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:25,999 INFO L225 Difference]: With dead ends: 12509 [2021-05-22 02:56:25,999 INFO L226 Difference]: Without dead ends: 12309 [2021-05-22 02:56:25,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 1417.2ms TimeCoverageRelationStatistics Valid=601, Invalid=3431, Unknown=0, NotChecked=0, Total=4032 [2021-05-22 02:56:26,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12309 states. [2021-05-22 02:56:26,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12309 to 11218. [2021-05-22 02:56:26,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11218 states, 11217 states have (on average 3.3482214495854508) internal successors, (37557), 11217 states have internal predecessors, (37557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:26,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11218 states to 11218 states and 37557 transitions. [2021-05-22 02:56:26,200 INFO L78 Accepts]: Start accepts. Automaton has 11218 states and 37557 transitions. Word has length 36 [2021-05-22 02:56:26,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:26,200 INFO L482 AbstractCegarLoop]: Abstraction has 11218 states and 37557 transitions. [2021-05-22 02:56:26,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:26,200 INFO L276 IsEmpty]: Start isEmpty. Operand 11218 states and 37557 transitions. [2021-05-22 02:56:26,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:56:26,213 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:26,213 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:26,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1060 [2021-05-22 02:56:26,413 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:26,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:26,413 INFO L82 PathProgramCache]: Analyzing trace with hash 301799153, now seen corresponding path program 134 times [2021-05-22 02:56:26,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:26,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582397306] [2021-05-22 02:56:26,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:26,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:26,629 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:26,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:26,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582397306] [2021-05-22 02:56:26,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582397306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:26,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525892044] [2021-05-22 02:56:26,629 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:26,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:56:26,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:56:26,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:56:26,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:27,141 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:27,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525892044] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:27,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:27,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-22 02:56:27,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41142063] [2021-05-22 02:56:27,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:56:27,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:27,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:56:27,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:56:27,142 INFO L87 Difference]: Start difference. First operand 11218 states and 37557 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:29,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:29,573 INFO L93 Difference]: Finished difference Result 12941 states and 42368 transitions. [2021-05-22 02:56:29,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-22 02:56:29,573 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:56:29,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:29,590 INFO L225 Difference]: With dead ends: 12941 [2021-05-22 02:56:29,590 INFO L226 Difference]: Without dead ends: 12710 [2021-05-22 02:56:29,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 1813.3ms TimeCoverageRelationStatistics Valid=718, Invalid=4832, Unknown=0, NotChecked=0, Total=5550 [2021-05-22 02:56:29,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12710 states. [2021-05-22 02:56:29,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12710 to 11268. [2021-05-22 02:56:29,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11268 states, 11267 states have (on average 3.3473861720067455) internal successors, (37715), 11267 states have internal predecessors, (37715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:29,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11268 states to 11268 states and 37715 transitions. [2021-05-22 02:56:29,760 INFO L78 Accepts]: Start accepts. Automaton has 11268 states and 37715 transitions. Word has length 36 [2021-05-22 02:56:29,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:29,760 INFO L482 AbstractCegarLoop]: Abstraction has 11268 states and 37715 transitions. [2021-05-22 02:56:29,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:29,760 INFO L276 IsEmpty]: Start isEmpty. Operand 11268 states and 37715 transitions. [2021-05-22 02:56:29,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:56:29,773 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:29,773 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:29,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1064,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:29,988 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:29,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:29,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1738497013, now seen corresponding path program 135 times [2021-05-22 02:56:29,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:29,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818796135] [2021-05-22 02:56:29,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:30,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:30,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818796135] [2021-05-22 02:56:30,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818796135] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:30,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68655393] [2021-05-22 02:56:30,240 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:30,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:56:30,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:56:30,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:56:30,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:30,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68655393] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:30,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:30,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2021-05-22 02:56:30,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280158640] [2021-05-22 02:56:30,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-22 02:56:30,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:30,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-22 02:56:30,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1224, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:56:30,816 INFO L87 Difference]: Start difference. First operand 11268 states and 37715 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:35,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:35,332 INFO L93 Difference]: Finished difference Result 16947 states and 54511 transitions. [2021-05-22 02:56:35,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-05-22 02:56:35,333 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:56:35,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:35,357 INFO L225 Difference]: With dead ends: 16947 [2021-05-22 02:56:35,357 INFO L226 Difference]: Without dead ends: 16668 [2021-05-22 02:56:35,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4075 ImplicationChecksByTransitivity, 3533.6ms TimeCoverageRelationStatistics Valid=1293, Invalid=11139, Unknown=0, NotChecked=0, Total=12432 [2021-05-22 02:56:35,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16668 states. [2021-05-22 02:56:35,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16668 to 11286. [2021-05-22 02:56:35,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11286 states, 11285 states have (on average 3.347718210013292) internal successors, (37779), 11285 states have internal predecessors, (37779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:35,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11286 states to 11286 states and 37779 transitions. [2021-05-22 02:56:35,568 INFO L78 Accepts]: Start accepts. Automaton has 11286 states and 37779 transitions. Word has length 36 [2021-05-22 02:56:35,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:35,568 INFO L482 AbstractCegarLoop]: Abstraction has 11286 states and 37779 transitions. [2021-05-22 02:56:35,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:35,568 INFO L276 IsEmpty]: Start isEmpty. Operand 11286 states and 37779 transitions. [2021-05-22 02:56:35,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:56:35,581 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:35,581 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:35,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1068 [2021-05-22 02:56:35,793 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:35,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:35,793 INFO L82 PathProgramCache]: Analyzing trace with hash -386278499, now seen corresponding path program 136 times [2021-05-22 02:56:35,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:35,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925470161] [2021-05-22 02:56:35,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:36,092 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:36,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:36,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925470161] [2021-05-22 02:56:36,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925470161] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:36,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518621723] [2021-05-22 02:56:36,092 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:36,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:56:36,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:56:36,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:56:36,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:36,782 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:36,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518621723] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:36,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:36,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-22 02:56:36,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334842966] [2021-05-22 02:56:36,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:56:36,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:36,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:56:36,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:56:36,783 INFO L87 Difference]: Start difference. First operand 11286 states and 37779 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:38,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:38,390 INFO L93 Difference]: Finished difference Result 14432 states and 47377 transitions. [2021-05-22 02:56:38,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-22 02:56:38,391 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:56:38,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:38,413 INFO L225 Difference]: With dead ends: 14432 [2021-05-22 02:56:38,413 INFO L226 Difference]: Without dead ends: 14343 [2021-05-22 02:56:38,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 1767.4ms TimeCoverageRelationStatistics Valid=581, Invalid=3451, Unknown=0, NotChecked=0, Total=4032 [2021-05-22 02:56:38,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14343 states. [2021-05-22 02:56:38,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14343 to 11334. [2021-05-22 02:56:38,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11334 states, 11333 states have (on average 3.3490690902673608) internal successors, (37955), 11333 states have internal predecessors, (37955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:38,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11334 states to 11334 states and 37955 transitions. [2021-05-22 02:56:38,595 INFO L78 Accepts]: Start accepts. Automaton has 11334 states and 37955 transitions. Word has length 36 [2021-05-22 02:56:38,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:38,595 INFO L482 AbstractCegarLoop]: Abstraction has 11334 states and 37955 transitions. [2021-05-22 02:56:38,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:38,595 INFO L276 IsEmpty]: Start isEmpty. Operand 11334 states and 37955 transitions. [2021-05-22 02:56:38,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:56:38,607 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:38,607 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:38,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1072 [2021-05-22 02:56:38,808 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:38,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:38,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1224205667, now seen corresponding path program 137 times [2021-05-22 02:56:38,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:38,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534890311] [2021-05-22 02:56:38,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:38,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:39,024 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:39,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:39,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534890311] [2021-05-22 02:56:39,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534890311] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:39,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740376833] [2021-05-22 02:56:39,024 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:39,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:56:39,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:56:39,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:56:39,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:39,601 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:39,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740376833] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:39,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:39,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-22 02:56:39,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593332761] [2021-05-22 02:56:39,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:56:39,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:39,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:56:39,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:56:39,602 INFO L87 Difference]: Start difference. First operand 11334 states and 37955 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:41,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:41,483 INFO L93 Difference]: Finished difference Result 12417 states and 40850 transitions. [2021-05-22 02:56:41,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-22 02:56:41,483 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:56:41,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:41,501 INFO L225 Difference]: With dead ends: 12417 [2021-05-22 02:56:41,501 INFO L226 Difference]: Without dead ends: 12241 [2021-05-22 02:56:41,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 1759.5ms TimeCoverageRelationStatistics Valid=790, Invalid=4322, Unknown=0, NotChecked=0, Total=5112 [2021-05-22 02:56:41,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12241 states. [2021-05-22 02:56:41,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12241 to 11288. [2021-05-22 02:56:41,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11288 states, 11287 states have (on average 3.3512004961460087) internal successors, (37825), 11287 states have internal predecessors, (37825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:41,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11288 states to 11288 states and 37825 transitions. [2021-05-22 02:56:41,668 INFO L78 Accepts]: Start accepts. Automaton has 11288 states and 37825 transitions. Word has length 36 [2021-05-22 02:56:41,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:41,668 INFO L482 AbstractCegarLoop]: Abstraction has 11288 states and 37825 transitions. [2021-05-22 02:56:41,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:41,668 INFO L276 IsEmpty]: Start isEmpty. Operand 11288 states and 37825 transitions. [2021-05-22 02:56:41,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:56:41,681 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:41,681 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:41,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1079 [2021-05-22 02:56:41,882 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:41,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:41,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1902267487, now seen corresponding path program 138 times [2021-05-22 02:56:41,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:41,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491155838] [2021-05-22 02:56:41,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:42,204 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:42,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:42,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491155838] [2021-05-22 02:56:42,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491155838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:42,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089593842] [2021-05-22 02:56:42,205 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:42,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:56:42,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:56:42,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:56:42,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:42,827 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:42,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089593842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:42,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:42,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-05-22 02:56:42,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350551969] [2021-05-22 02:56:42,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:56:42,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:42,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:56:42,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1011, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:56:42,828 INFO L87 Difference]: Start difference. First operand 11288 states and 37825 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:46,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:46,489 INFO L93 Difference]: Finished difference Result 19538 states and 62921 transitions. [2021-05-22 02:56:46,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-22 02:56:46,489 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:56:46,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:46,519 INFO L225 Difference]: With dead ends: 19538 [2021-05-22 02:56:46,519 INFO L226 Difference]: Without dead ends: 19424 [2021-05-22 02:56:46,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2684 ImplicationChecksByTransitivity, 3209.8ms TimeCoverageRelationStatistics Valid=1306, Invalid=6884, Unknown=0, NotChecked=0, Total=8190 [2021-05-22 02:56:46,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19424 states. [2021-05-22 02:56:46,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19424 to 11369. [2021-05-22 02:56:46,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11369 states, 11368 states have (on average 3.3516889514426462) internal successors, (38102), 11368 states have internal predecessors, (38102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:46,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11369 states to 11369 states and 38102 transitions. [2021-05-22 02:56:46,736 INFO L78 Accepts]: Start accepts. Automaton has 11369 states and 38102 transitions. Word has length 36 [2021-05-22 02:56:46,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:46,736 INFO L482 AbstractCegarLoop]: Abstraction has 11369 states and 38102 transitions. [2021-05-22 02:56:46,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:46,737 INFO L276 IsEmpty]: Start isEmpty. Operand 11369 states and 38102 transitions. [2021-05-22 02:56:46,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:56:46,750 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:46,751 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:46,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1083 [2021-05-22 02:56:46,951 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:46,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:46,951 INFO L82 PathProgramCache]: Analyzing trace with hash -484783711, now seen corresponding path program 139 times [2021-05-22 02:56:46,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:46,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738782991] [2021-05-22 02:56:46,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:46,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:47,179 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:47,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:47,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738782991] [2021-05-22 02:56:47,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738782991] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:47,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116789250] [2021-05-22 02:56:47,179 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:47,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:47,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:56:47,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:47,720 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:47,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116789250] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:47,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:47,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-05-22 02:56:47,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142943461] [2021-05-22 02:56:47,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-22 02:56:47,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:47,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-22 02:56:47,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1200, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:56:47,721 INFO L87 Difference]: Start difference. First operand 11369 states and 38102 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:50,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:50,334 INFO L93 Difference]: Finished difference Result 16547 states and 53487 transitions. [2021-05-22 02:56:50,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-22 02:56:50,334 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:56:50,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:50,361 INFO L225 Difference]: With dead ends: 16547 [2021-05-22 02:56:50,361 INFO L226 Difference]: Without dead ends: 16315 [2021-05-22 02:56:50,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2566 ImplicationChecksByTransitivity, 2340.7ms TimeCoverageRelationStatistics Valid=1155, Invalid=6855, Unknown=0, NotChecked=0, Total=8010 [2021-05-22 02:56:50,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16315 states. [2021-05-22 02:56:50,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16315 to 11361. [2021-05-22 02:56:50,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11361 states, 11360 states have (on average 3.351232394366197) internal successors, (38070), 11360 states have internal predecessors, (38070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:50,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11361 states to 11361 states and 38070 transitions. [2021-05-22 02:56:50,573 INFO L78 Accepts]: Start accepts. Automaton has 11361 states and 38070 transitions. Word has length 36 [2021-05-22 02:56:50,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:50,573 INFO L482 AbstractCegarLoop]: Abstraction has 11361 states and 38070 transitions. [2021-05-22 02:56:50,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:50,573 INFO L276 IsEmpty]: Start isEmpty. Operand 11361 states and 38070 transitions. [2021-05-22 02:56:50,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:56:50,586 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:50,586 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:50,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1093,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:50,787 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:50,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:50,787 INFO L82 PathProgramCache]: Analyzing trace with hash 507709853, now seen corresponding path program 140 times [2021-05-22 02:56:50,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:50,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906766511] [2021-05-22 02:56:50,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:51,017 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:51,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:51,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906766511] [2021-05-22 02:56:51,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906766511] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:51,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084054134] [2021-05-22 02:56:51,017 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:51,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:56:51,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:56:51,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:56:51,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:51,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084054134] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:51,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:51,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-05-22 02:56:51,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773594327] [2021-05-22 02:56:51,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:56:51,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:51,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:56:51,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:56:51,552 INFO L87 Difference]: Start difference. First operand 11361 states and 38070 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:55,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:55,874 INFO L93 Difference]: Finished difference Result 17575 states and 56464 transitions. [2021-05-22 02:56:55,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-05-22 02:56:55,874 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:56:55,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:55,902 INFO L225 Difference]: With dead ends: 17575 [2021-05-22 02:56:55,902 INFO L226 Difference]: Without dead ends: 17288 [2021-05-22 02:56:55,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3914 ImplicationChecksByTransitivity, 3300.4ms TimeCoverageRelationStatistics Valid=1462, Invalid=10094, Unknown=0, NotChecked=0, Total=11556 [2021-05-22 02:56:55,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17288 states. [2021-05-22 02:56:56,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17288 to 11297. [2021-05-22 02:56:56,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11297 states, 11296 states have (on average 3.3473796033994336) internal successors, (37812), 11296 states have internal predecessors, (37812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:56,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11297 states to 11297 states and 37812 transitions. [2021-05-22 02:56:56,160 INFO L78 Accepts]: Start accepts. Automaton has 11297 states and 37812 transitions. Word has length 36 [2021-05-22 02:56:56,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:56,160 INFO L482 AbstractCegarLoop]: Abstraction has 11297 states and 37812 transitions. [2021-05-22 02:56:56,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:56,161 INFO L276 IsEmpty]: Start isEmpty. Operand 11297 states and 37812 transitions. [2021-05-22 02:56:56,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:56:56,174 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:56,174 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:56,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1097,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:56,375 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:56,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:56,375 INFO L82 PathProgramCache]: Analyzing trace with hash -4354079, now seen corresponding path program 141 times [2021-05-22 02:56:56,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:56,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757822917] [2021-05-22 02:56:56,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:56,715 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:56,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:56,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757822917] [2021-05-22 02:56:56,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757822917] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:56,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359800101] [2021-05-22 02:56:56,716 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:56,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:56:56,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:56:56,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:56:56,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:57,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359800101] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:57,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:57,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-05-22 02:56:57,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557429150] [2021-05-22 02:56:57,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:56:57,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:57,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:56:57,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:56:57,272 INFO L87 Difference]: Start difference. First operand 11297 states and 37812 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:59,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:59,895 INFO L93 Difference]: Finished difference Result 20632 states and 67023 transitions. [2021-05-22 02:56:59,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-22 02:56:59,895 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:56:59,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:59,924 INFO L225 Difference]: With dead ends: 20632 [2021-05-22 02:56:59,924 INFO L226 Difference]: Without dead ends: 20488 [2021-05-22 02:56:59,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 2460.1ms TimeCoverageRelationStatistics Valid=1043, Invalid=4809, Unknown=0, NotChecked=0, Total=5852 [2021-05-22 02:56:59,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20488 states. [2021-05-22 02:57:00,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20488 to 11271. [2021-05-22 02:57:00,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11271 states, 11270 states have (on average 3.345785270629991) internal successors, (37707), 11270 states have internal predecessors, (37707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:00,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11271 states to 11271 states and 37707 transitions. [2021-05-22 02:57:00,137 INFO L78 Accepts]: Start accepts. Automaton has 11271 states and 37707 transitions. Word has length 36 [2021-05-22 02:57:00,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:00,137 INFO L482 AbstractCegarLoop]: Abstraction has 11271 states and 37707 transitions. [2021-05-22 02:57:00,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:00,137 INFO L276 IsEmpty]: Start isEmpty. Operand 11271 states and 37707 transitions. [2021-05-22 02:57:00,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:57:00,149 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:00,149 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:00,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1101,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:00,350 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:00,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:00,350 INFO L82 PathProgramCache]: Analyzing trace with hash 720683361, now seen corresponding path program 142 times [2021-05-22 02:57:00,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:00,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755795549] [2021-05-22 02:57:00,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:00,611 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:00,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:00,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755795549] [2021-05-22 02:57:00,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755795549] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:00,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693513367] [2021-05-22 02:57:00,612 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:00,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:57:00,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:57:00,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:57:00,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:01,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693513367] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:01,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:01,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 02:57:01,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134502911] [2021-05-22 02:57:01,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:57:01,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:01,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:57:01,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1001, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:57:01,173 INFO L87 Difference]: Start difference. First operand 11271 states and 37707 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:02,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:02,711 INFO L93 Difference]: Finished difference Result 15161 states and 49899 transitions. [2021-05-22 02:57:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-22 02:57:02,711 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:57:02,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:02,731 INFO L225 Difference]: With dead ends: 15161 [2021-05-22 02:57:02,732 INFO L226 Difference]: Without dead ends: 15041 [2021-05-22 02:57:02,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1371.6ms TimeCoverageRelationStatistics Valid=516, Invalid=2346, Unknown=0, NotChecked=0, Total=2862 [2021-05-22 02:57:02,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15041 states. [2021-05-22 02:57:02,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15041 to 11267. [2021-05-22 02:57:02,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11267 states, 11266 states have (on average 3.3459080418959704) internal successors, (37695), 11266 states have internal predecessors, (37695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:02,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11267 states to 11267 states and 37695 transitions. [2021-05-22 02:57:02,908 INFO L78 Accepts]: Start accepts. Automaton has 11267 states and 37695 transitions. Word has length 36 [2021-05-22 02:57:02,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:02,908 INFO L482 AbstractCegarLoop]: Abstraction has 11267 states and 37695 transitions. [2021-05-22 02:57:02,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:02,908 INFO L276 IsEmpty]: Start isEmpty. Operand 11267 states and 37695 transitions. [2021-05-22 02:57:02,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:57:02,920 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:02,920 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:03,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1111 [2021-05-22 02:57:03,121 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:03,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:03,121 INFO L82 PathProgramCache]: Analyzing trace with hash -852237963, now seen corresponding path program 143 times [2021-05-22 02:57:03,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:03,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608706138] [2021-05-22 02:57:03,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:03,325 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:03,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:03,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608706138] [2021-05-22 02:57:03,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608706138] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:03,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955455061] [2021-05-22 02:57:03,326 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:03,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:57:03,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:57:03,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:57:03,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:03,831 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:03,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955455061] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:03,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:03,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-22 02:57:03,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134977442] [2021-05-22 02:57:03,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:57:03,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:03,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:57:03,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1141, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:57:03,832 INFO L87 Difference]: Start difference. First operand 11267 states and 37695 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:06,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:06,002 INFO L93 Difference]: Finished difference Result 13598 states and 44373 transitions. [2021-05-22 02:57:06,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-22 02:57:06,003 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:57:06,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:06,021 INFO L225 Difference]: With dead ends: 13598 [2021-05-22 02:57:06,021 INFO L226 Difference]: Without dead ends: 13285 [2021-05-22 02:57:06,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 1781.6ms TimeCoverageRelationStatistics Valid=849, Invalid=4553, Unknown=0, NotChecked=0, Total=5402 [2021-05-22 02:57:06,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13285 states. [2021-05-22 02:57:06,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13285 to 11259. [2021-05-22 02:57:06,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11259 states, 11258 states have (on average 3.346686800497424) internal successors, (37677), 11258 states have internal predecessors, (37677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:06,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11259 states to 11259 states and 37677 transitions. [2021-05-22 02:57:06,204 INFO L78 Accepts]: Start accepts. Automaton has 11259 states and 37677 transitions. Word has length 36 [2021-05-22 02:57:06,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:06,204 INFO L482 AbstractCegarLoop]: Abstraction has 11259 states and 37677 transitions. [2021-05-22 02:57:06,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:06,205 INFO L276 IsEmpty]: Start isEmpty. Operand 11259 states and 37677 transitions. [2021-05-22 02:57:06,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:57:06,218 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:06,218 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:06,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1118 [2021-05-22 02:57:06,418 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:06,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:06,418 INFO L82 PathProgramCache]: Analyzing trace with hash -63878539, now seen corresponding path program 144 times [2021-05-22 02:57:06,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:06,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979770179] [2021-05-22 02:57:06,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:06,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:06,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:06,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979770179] [2021-05-22 02:57:06,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979770179] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:06,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475806080] [2021-05-22 02:57:06,624 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:06,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:57:06,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:57:06,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:57:06,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:07,122 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:07,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475806080] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:07,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:07,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-22 02:57:07,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207722891] [2021-05-22 02:57:07,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:57:07,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:07,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:57:07,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1043, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:57:07,122 INFO L87 Difference]: Start difference. First operand 11259 states and 37677 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:09,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:09,699 INFO L93 Difference]: Finished difference Result 16239 states and 52443 transitions. [2021-05-22 02:57:09,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-22 02:57:09,699 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:57:09,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:09,721 INFO L225 Difference]: With dead ends: 16239 [2021-05-22 02:57:09,721 INFO L226 Difference]: Without dead ends: 16041 [2021-05-22 02:57:09,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1886 ImplicationChecksByTransitivity, 2088.9ms TimeCoverageRelationStatistics Valid=1007, Invalid=5155, Unknown=0, NotChecked=0, Total=6162 [2021-05-22 02:57:09,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16041 states. [2021-05-22 02:57:09,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16041 to 11281. [2021-05-22 02:57:09,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11281 states, 11280 states have (on average 3.3474290780141844) internal successors, (37759), 11280 states have internal predecessors, (37759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:09,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11281 states to 11281 states and 37759 transitions. [2021-05-22 02:57:09,918 INFO L78 Accepts]: Start accepts. Automaton has 11281 states and 37759 transitions. Word has length 36 [2021-05-22 02:57:09,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:09,918 INFO L482 AbstractCegarLoop]: Abstraction has 11281 states and 37759 transitions. [2021-05-22 02:57:09,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:09,918 INFO L276 IsEmpty]: Start isEmpty. Operand 11281 states and 37759 transitions. [2021-05-22 02:57:09,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:57:09,930 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:09,930 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:10,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1122 [2021-05-22 02:57:10,141 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:10,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:10,141 INFO L82 PathProgramCache]: Analyzing trace with hash -2093411555, now seen corresponding path program 145 times [2021-05-22 02:57:10,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:10,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368599163] [2021-05-22 02:57:10,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:10,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:10,348 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:10,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:10,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368599163] [2021-05-22 02:57:10,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368599163] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:10,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041642500] [2021-05-22 02:57:10,349 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:10,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:57:10,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:10,852 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:10,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041642500] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:10,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:10,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-22 02:57:10,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133781917] [2021-05-22 02:57:10,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:57:10,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:10,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:57:10,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1109, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:57:10,852 INFO L87 Difference]: Start difference. First operand 11281 states and 37759 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:13,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:13,179 INFO L93 Difference]: Finished difference Result 16777 states and 54183 transitions. [2021-05-22 02:57:13,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-22 02:57:13,179 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:57:13,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:13,203 INFO L225 Difference]: With dead ends: 16777 [2021-05-22 02:57:13,203 INFO L226 Difference]: Without dead ends: 16575 [2021-05-22 02:57:13,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 2063.0ms TimeCoverageRelationStatistics Valid=1047, Invalid=4959, Unknown=0, NotChecked=0, Total=6006 [2021-05-22 02:57:13,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16575 states. [2021-05-22 02:57:13,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16575 to 11178. [2021-05-22 02:57:13,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11178 states, 11177 states have (on average 3.34633622617876) internal successors, (37402), 11177 states have internal predecessors, (37402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:13,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11178 states to 11178 states and 37402 transitions. [2021-05-22 02:57:13,415 INFO L78 Accepts]: Start accepts. Automaton has 11178 states and 37402 transitions. Word has length 36 [2021-05-22 02:57:13,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:13,415 INFO L482 AbstractCegarLoop]: Abstraction has 11178 states and 37402 transitions. [2021-05-22 02:57:13,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:13,415 INFO L276 IsEmpty]: Start isEmpty. Operand 11178 states and 37402 transitions. [2021-05-22 02:57:13,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:57:13,428 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:13,428 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:13,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1126 [2021-05-22 02:57:13,629 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:13,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:13,629 INFO L82 PathProgramCache]: Analyzing trace with hash 851216925, now seen corresponding path program 146 times [2021-05-22 02:57:13,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:13,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39648372] [2021-05-22 02:57:13,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:13,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:13,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:13,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39648372] [2021-05-22 02:57:13,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39648372] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:13,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497964260] [2021-05-22 02:57:13,831 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:13,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:57:13,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:57:13,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:57:13,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:14,297 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:14,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497964260] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:14,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:14,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-05-22 02:57:14,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106096559] [2021-05-22 02:57:14,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-22 02:57:14,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:14,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-22 02:57:14,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:57:14,298 INFO L87 Difference]: Start difference. First operand 11178 states and 37402 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:15,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:15,494 INFO L93 Difference]: Finished difference Result 17045 states and 56033 transitions. [2021-05-22 02:57:15,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-22 02:57:15,495 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:57:15,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:15,519 INFO L225 Difference]: With dead ends: 17045 [2021-05-22 02:57:15,519 INFO L226 Difference]: Without dead ends: 16965 [2021-05-22 02:57:15,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1065.4ms TimeCoverageRelationStatistics Valid=499, Invalid=2257, Unknown=0, NotChecked=0, Total=2756 [2021-05-22 02:57:15,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16965 states. [2021-05-22 02:57:15,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16965 to 11135. [2021-05-22 02:57:15,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11135 states, 11134 states have (on average 3.34560804742231) internal successors, (37250), 11134 states have internal predecessors, (37250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:15,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11135 states to 11135 states and 37250 transitions. [2021-05-22 02:57:15,734 INFO L78 Accepts]: Start accepts. Automaton has 11135 states and 37250 transitions. Word has length 36 [2021-05-22 02:57:15,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:15,734 INFO L482 AbstractCegarLoop]: Abstraction has 11135 states and 37250 transitions. [2021-05-22 02:57:15,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:15,734 INFO L276 IsEmpty]: Start isEmpty. Operand 11135 states and 37250 transitions. [2021-05-22 02:57:15,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:57:15,746 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:15,747 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:15,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1130,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:15,947 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:15,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:15,947 INFO L82 PathProgramCache]: Analyzing trace with hash 805896121, now seen corresponding path program 147 times [2021-05-22 02:57:15,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:15,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314815835] [2021-05-22 02:57:15,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:16,200 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:16,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:16,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314815835] [2021-05-22 02:57:16,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314815835] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:16,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908916212] [2021-05-22 02:57:16,201 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:16,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:57:16,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:57:16,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:57:16,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:16,670 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:16,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908916212] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:16,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:16,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-05-22 02:57:16,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516288351] [2021-05-22 02:57:16,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-22 02:57:16,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:16,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-22 02:57:16,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:57:16,671 INFO L87 Difference]: Start difference. First operand 11135 states and 37250 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:17,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:17,961 INFO L93 Difference]: Finished difference Result 12630 states and 41581 transitions. [2021-05-22 02:57:17,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-22 02:57:17,961 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:57:17,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:17,979 INFO L225 Difference]: With dead ends: 12630 [2021-05-22 02:57:17,980 INFO L226 Difference]: Without dead ends: 12437 [2021-05-22 02:57:17,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1246.6ms TimeCoverageRelationStatistics Valid=418, Invalid=2552, Unknown=0, NotChecked=0, Total=2970 [2021-05-22 02:57:17,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12437 states. [2021-05-22 02:57:18,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12437 to 11095. [2021-05-22 02:57:18,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11095 states, 11094 states have (on average 3.3466738777717686) internal successors, (37128), 11094 states have internal predecessors, (37128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:18,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11095 states to 11095 states and 37128 transitions. [2021-05-22 02:57:18,189 INFO L78 Accepts]: Start accepts. Automaton has 11095 states and 37128 transitions. Word has length 36 [2021-05-22 02:57:18,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:18,189 INFO L482 AbstractCegarLoop]: Abstraction has 11095 states and 37128 transitions. [2021-05-22 02:57:18,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:18,189 INFO L276 IsEmpty]: Start isEmpty. Operand 11095 states and 37128 transitions. [2021-05-22 02:57:18,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:57:18,201 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:18,201 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:18,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1144 [2021-05-22 02:57:18,402 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:18,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:18,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1758168477, now seen corresponding path program 148 times [2021-05-22 02:57:18,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:18,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629606221] [2021-05-22 02:57:18,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:18,618 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:18,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:18,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629606221] [2021-05-22 02:57:18,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629606221] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:18,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734290423] [2021-05-22 02:57:18,618 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:18,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:57:18,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:57:18,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:57:18,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:19,161 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:19,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734290423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:19,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:19,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 02:57:19,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051602545] [2021-05-22 02:57:19,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:57:19,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:19,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:57:19,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:57:19,162 INFO L87 Difference]: Start difference. First operand 11095 states and 37128 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:20,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:20,675 INFO L93 Difference]: Finished difference Result 18660 states and 61077 transitions. [2021-05-22 02:57:20,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-22 02:57:20,675 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:57:20,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:20,703 INFO L225 Difference]: With dead ends: 18660 [2021-05-22 02:57:20,703 INFO L226 Difference]: Without dead ends: 18580 [2021-05-22 02:57:20,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1162.1ms TimeCoverageRelationStatistics Valid=531, Invalid=2549, Unknown=0, NotChecked=0, Total=3080 [2021-05-22 02:57:20,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18580 states. [2021-05-22 02:57:20,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18580 to 11219. [2021-05-22 02:57:20,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11219 states, 11218 states have (on average 3.345872704581922) internal successors, (37534), 11218 states have internal predecessors, (37534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:20,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11219 states to 11219 states and 37534 transitions. [2021-05-22 02:57:20,991 INFO L78 Accepts]: Start accepts. Automaton has 11219 states and 37534 transitions. Word has length 36 [2021-05-22 02:57:20,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:20,991 INFO L482 AbstractCegarLoop]: Abstraction has 11219 states and 37534 transitions. [2021-05-22 02:57:20,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:20,991 INFO L276 IsEmpty]: Start isEmpty. Operand 11219 states and 37534 transitions. [2021-05-22 02:57:21,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:57:21,003 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:21,003 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:21,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1149,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:21,204 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:21,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:21,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1371012593, now seen corresponding path program 149 times [2021-05-22 02:57:21,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:21,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813691231] [2021-05-22 02:57:21,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:21,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:21,408 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:21,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:21,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813691231] [2021-05-22 02:57:21,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813691231] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:21,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378535840] [2021-05-22 02:57:21,408 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:21,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-22 02:57:21,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:57:21,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:57:21,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:21,945 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:21,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378535840] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:21,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:21,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 02:57:21,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802627871] [2021-05-22 02:57:21,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:57:21,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:21,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:57:21,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:57:21,946 INFO L87 Difference]: Start difference. First operand 11219 states and 37534 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:23,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:23,904 INFO L93 Difference]: Finished difference Result 19190 states and 62860 transitions. [2021-05-22 02:57:23,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-22 02:57:23,904 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:57:23,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:23,934 INFO L225 Difference]: With dead ends: 19190 [2021-05-22 02:57:23,934 INFO L226 Difference]: Without dead ends: 19110 [2021-05-22 02:57:23,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 1538.2ms TimeCoverageRelationStatistics Valid=707, Invalid=3715, Unknown=0, NotChecked=0, Total=4422 [2021-05-22 02:57:23,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19110 states. [2021-05-22 02:57:24,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19110 to 11293. [2021-05-22 02:57:24,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11293 states, 11292 states have (on average 3.34643995749203) internal successors, (37788), 11292 states have internal predecessors, (37788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:24,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11293 states to 11293 states and 37788 transitions. [2021-05-22 02:57:24,196 INFO L78 Accepts]: Start accepts. Automaton has 11293 states and 37788 transitions. Word has length 36 [2021-05-22 02:57:24,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:24,197 INFO L482 AbstractCegarLoop]: Abstraction has 11293 states and 37788 transitions. [2021-05-22 02:57:24,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:24,197 INFO L276 IsEmpty]: Start isEmpty. Operand 11293 states and 37788 transitions. [2021-05-22 02:57:24,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:57:24,209 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:24,209 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:24,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1163,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:24,410 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:24,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:24,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1839999759, now seen corresponding path program 150 times [2021-05-22 02:57:24,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:24,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129674264] [2021-05-22 02:57:24,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:24,651 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:24,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:24,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129674264] [2021-05-22 02:57:24,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129674264] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:24,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736361823] [2021-05-22 02:57:24,651 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:24,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:57:24,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:57:24,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:57:24,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:25,286 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:25,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736361823] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:25,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:25,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-05-22 02:57:25,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136915495] [2021-05-22 02:57:25,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:57:25,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:25,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:57:25,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:57:25,287 INFO L87 Difference]: Start difference. First operand 11293 states and 37788 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:27,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:27,700 INFO L93 Difference]: Finished difference Result 21695 states and 69593 transitions. [2021-05-22 02:57:27,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-22 02:57:27,700 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:57:27,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:27,732 INFO L225 Difference]: With dead ends: 21695 [2021-05-22 02:57:27,732 INFO L226 Difference]: Without dead ends: 21551 [2021-05-22 02:57:27,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 2147.0ms TimeCoverageRelationStatistics Valid=1057, Invalid=4493, Unknown=0, NotChecked=0, Total=5550 [2021-05-22 02:57:27,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21551 states. [2021-05-22 02:57:27,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21551 to 11339. [2021-05-22 02:57:27,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11339 states, 11338 states have (on average 3.347062974069501) internal successors, (37949), 11338 states have internal predecessors, (37949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:27,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11339 states to 11339 states and 37949 transitions. [2021-05-22 02:57:27,976 INFO L78 Accepts]: Start accepts. Automaton has 11339 states and 37949 transitions. Word has length 36 [2021-05-22 02:57:27,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:27,976 INFO L482 AbstractCegarLoop]: Abstraction has 11339 states and 37949 transitions. [2021-05-22 02:57:27,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:27,976 INFO L276 IsEmpty]: Start isEmpty. Operand 11339 states and 37949 transitions. [2021-05-22 02:57:27,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:57:27,989 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:27,989 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:28,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1177 [2021-05-22 02:57:28,189 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:28,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:28,189 INFO L82 PathProgramCache]: Analyzing trace with hash -555858699, now seen corresponding path program 151 times [2021-05-22 02:57:28,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:28,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094668772] [2021-05-22 02:57:28,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:28,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:28,455 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:28,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:28,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094668772] [2021-05-22 02:57:28,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094668772] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:28,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365806731] [2021-05-22 02:57:28,455 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:28,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:57:28,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:29,166 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:29,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365806731] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:29,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:29,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-05-22 02:57:29,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910485361] [2021-05-22 02:57:29,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:57:29,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:29,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:57:29,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1109, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:57:29,167 INFO L87 Difference]: Start difference. First operand 11339 states and 37949 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:33,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:33,160 INFO L93 Difference]: Finished difference Result 21691 states and 69332 transitions. [2021-05-22 02:57:33,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-22 02:57:33,161 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:57:33,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:33,192 INFO L225 Difference]: With dead ends: 21691 [2021-05-22 02:57:33,192 INFO L226 Difference]: Without dead ends: 21551 [2021-05-22 02:57:33,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3862 ImplicationChecksByTransitivity, 3448.2ms TimeCoverageRelationStatistics Valid=1867, Invalid=9475, Unknown=0, NotChecked=0, Total=11342 [2021-05-22 02:57:33,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21551 states. [2021-05-22 02:57:33,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21551 to 11261. [2021-05-22 02:57:33,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11261 states, 11260 states have (on average 3.3429840142095917) internal successors, (37642), 11260 states have internal predecessors, (37642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:33,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11261 states to 11261 states and 37642 transitions. [2021-05-22 02:57:33,435 INFO L78 Accepts]: Start accepts. Automaton has 11261 states and 37642 transitions. Word has length 36 [2021-05-22 02:57:33,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:33,435 INFO L482 AbstractCegarLoop]: Abstraction has 11261 states and 37642 transitions. [2021-05-22 02:57:33,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:33,435 INFO L276 IsEmpty]: Start isEmpty. Operand 11261 states and 37642 transitions. [2021-05-22 02:57:33,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:57:33,448 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:33,448 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:33,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1189 [2021-05-22 02:57:33,648 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:33,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:33,648 INFO L82 PathProgramCache]: Analyzing trace with hash 365843441, now seen corresponding path program 152 times [2021-05-22 02:57:33,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:33,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43323235] [2021-05-22 02:57:33,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:33,963 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:33,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:33,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43323235] [2021-05-22 02:57:33,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43323235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:33,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979217538] [2021-05-22 02:57:33,963 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:33,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:57:33,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:57:33,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:57:33,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:34,637 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:34,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979217538] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:34,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:34,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-05-22 02:57:34,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887256036] [2021-05-22 02:57:34,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:57:34,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:34,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:57:34,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1032, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:57:34,638 INFO L87 Difference]: Start difference. First operand 11261 states and 37642 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:38,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:38,857 INFO L93 Difference]: Finished difference Result 22170 states and 70997 transitions. [2021-05-22 02:57:38,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-05-22 02:57:38,857 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:57:38,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:38,890 INFO L225 Difference]: With dead ends: 22170 [2021-05-22 02:57:38,890 INFO L226 Difference]: Without dead ends: 22023 [2021-05-22 02:57:38,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3908 ImplicationChecksByTransitivity, 3705.8ms TimeCoverageRelationStatistics Valid=1849, Invalid=9707, Unknown=0, NotChecked=0, Total=11556 [2021-05-22 02:57:38,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22023 states. [2021-05-22 02:57:39,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22023 to 11059. [2021-05-22 02:57:39,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11059 states, 11058 states have (on average 3.3411105082293364) internal successors, (36946), 11058 states have internal predecessors, (36946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:39,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11059 states to 11059 states and 36946 transitions. [2021-05-22 02:57:39,140 INFO L78 Accepts]: Start accepts. Automaton has 11059 states and 36946 transitions. Word has length 36 [2021-05-22 02:57:39,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:39,141 INFO L482 AbstractCegarLoop]: Abstraction has 11059 states and 36946 transitions. [2021-05-22 02:57:39,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:39,141 INFO L276 IsEmpty]: Start isEmpty. Operand 11059 states and 36946 transitions. [2021-05-22 02:57:39,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:57:39,153 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:39,153 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:39,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1201 [2021-05-22 02:57:39,360 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:39,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:39,361 INFO L82 PathProgramCache]: Analyzing trace with hash 160293389, now seen corresponding path program 153 times [2021-05-22 02:57:39,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:39,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229703808] [2021-05-22 02:57:39,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:39,600 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:39,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:39,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229703808] [2021-05-22 02:57:39,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229703808] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:39,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824195180] [2021-05-22 02:57:39,600 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:39,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:57:39,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:57:39,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:57:39,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:40,271 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:40,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824195180] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:40,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:40,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-05-22 02:57:40,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023814324] [2021-05-22 02:57:40,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:57:40,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:40,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:57:40,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:57:40,272 INFO L87 Difference]: Start difference. First operand 11059 states and 36946 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:42,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:42,537 INFO L93 Difference]: Finished difference Result 21001 states and 67476 transitions. [2021-05-22 02:57:42,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-22 02:57:42,538 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:57:42,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:42,568 INFO L225 Difference]: With dead ends: 21001 [2021-05-22 02:57:42,569 INFO L226 Difference]: Without dead ends: 20857 [2021-05-22 02:57:42,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1708 ImplicationChecksByTransitivity, 2074.8ms TimeCoverageRelationStatistics Valid=1042, Invalid=4360, Unknown=0, NotChecked=0, Total=5402 [2021-05-22 02:57:42,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20857 states. [2021-05-22 02:57:42,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20857 to 11071. [2021-05-22 02:57:42,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11071 states, 11070 states have (on average 3.3383920505871725) internal successors, (36956), 11070 states have internal predecessors, (36956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:42,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11071 states to 11071 states and 36956 transitions. [2021-05-22 02:57:42,811 INFO L78 Accepts]: Start accepts. Automaton has 11071 states and 36956 transitions. Word has length 36 [2021-05-22 02:57:42,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:42,811 INFO L482 AbstractCegarLoop]: Abstraction has 11071 states and 36956 transitions. [2021-05-22 02:57:42,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:42,811 INFO L276 IsEmpty]: Start isEmpty. Operand 11071 states and 36956 transitions. [2021-05-22 02:57:42,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:57:42,823 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:42,823 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:43,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1213 [2021-05-22 02:57:43,023 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:43,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:43,024 INFO L82 PathProgramCache]: Analyzing trace with hash 33738725, now seen corresponding path program 154 times [2021-05-22 02:57:43,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:43,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288250241] [2021-05-22 02:57:43,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:43,242 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:43,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:43,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288250241] [2021-05-22 02:57:43,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288250241] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:43,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034410567] [2021-05-22 02:57:43,243 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:43,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:57:43,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:57:43,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:57:43,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:43,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034410567] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:43,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:43,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 02:57:43,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987808274] [2021-05-22 02:57:43,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:57:43,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:43,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:57:43,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:57:43,947 INFO L87 Difference]: Start difference. First operand 11071 states and 36956 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:46,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:46,250 INFO L93 Difference]: Finished difference Result 16954 states and 55580 transitions. [2021-05-22 02:57:46,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-22 02:57:46,250 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:57:46,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:46,276 INFO L225 Difference]: With dead ends: 16954 [2021-05-22 02:57:46,276 INFO L226 Difference]: Without dead ends: 16859 [2021-05-22 02:57:46,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 1874.1ms TimeCoverageRelationStatistics Valid=677, Invalid=3879, Unknown=0, NotChecked=0, Total=4556 [2021-05-22 02:57:46,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16859 states. [2021-05-22 02:57:46,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16859 to 11161. [2021-05-22 02:57:46,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11161 states, 11160 states have (on average 3.338172043010753) internal successors, (37254), 11160 states have internal predecessors, (37254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:46,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11161 states to 11161 states and 37254 transitions. [2021-05-22 02:57:46,510 INFO L78 Accepts]: Start accepts. Automaton has 11161 states and 37254 transitions. Word has length 36 [2021-05-22 02:57:46,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:46,510 INFO L482 AbstractCegarLoop]: Abstraction has 11161 states and 37254 transitions. [2021-05-22 02:57:46,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:46,510 INFO L276 IsEmpty]: Start isEmpty. Operand 11161 states and 37254 transitions. [2021-05-22 02:57:46,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:57:46,523 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:46,523 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:46,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1225,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:46,724 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:46,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:46,724 INFO L82 PathProgramCache]: Analyzing trace with hash 955440865, now seen corresponding path program 155 times [2021-05-22 02:57:46,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:46,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615096502] [2021-05-22 02:57:46,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:46,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:46,944 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:46,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:46,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615096502] [2021-05-22 02:57:46,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615096502] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:46,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572402665] [2021-05-22 02:57:46,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:46,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 02:57:46,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:57:46,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:57:46,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:47,572 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:47,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572402665] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:47,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:47,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 02:57:47,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643925223] [2021-05-22 02:57:47,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:57:47,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:47,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:57:47,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1006, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:57:47,573 INFO L87 Difference]: Start difference. First operand 11161 states and 37254 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:49,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:49,130 INFO L93 Difference]: Finished difference Result 18115 states and 58822 transitions. [2021-05-22 02:57:49,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-22 02:57:49,130 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:57:49,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:49,159 INFO L225 Difference]: With dead ends: 18115 [2021-05-22 02:57:49,159 INFO L226 Difference]: Without dead ends: 17995 [2021-05-22 02:57:49,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1292.2ms TimeCoverageRelationStatistics Valid=478, Invalid=2384, Unknown=0, NotChecked=0, Total=2862 [2021-05-22 02:57:49,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17995 states. [2021-05-22 02:57:49,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17995 to 11155. [2021-05-22 02:57:49,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11155 states, 11154 states have (on average 3.3381746458669537) internal successors, (37234), 11154 states have internal predecessors, (37234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:49,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11155 states to 11155 states and 37234 transitions. [2021-05-22 02:57:49,427 INFO L78 Accepts]: Start accepts. Automaton has 11155 states and 37234 transitions. Word has length 36 [2021-05-22 02:57:49,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:49,427 INFO L482 AbstractCegarLoop]: Abstraction has 11155 states and 37234 transitions. [2021-05-22 02:57:49,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:49,427 INFO L276 IsEmpty]: Start isEmpty. Operand 11155 states and 37234 transitions. [2021-05-22 02:57:49,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:57:49,439 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:49,439 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:49,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1237 [2021-05-22 02:57:49,640 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:49,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:49,640 INFO L82 PathProgramCache]: Analyzing trace with hash 885330829, now seen corresponding path program 156 times [2021-05-22 02:57:49,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:49,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591167650] [2021-05-22 02:57:49,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:49,859 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:49,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:49,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591167650] [2021-05-22 02:57:49,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591167650] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:49,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840402080] [2021-05-22 02:57:49,860 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:49,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:57:49,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:57:49,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:57:49,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:50,460 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:50,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840402080] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:50,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:50,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-05-22 02:57:50,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905863530] [2021-05-22 02:57:50,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-22 02:57:50,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:50,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-22 02:57:50,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:57:50,461 INFO L87 Difference]: Start difference. First operand 11155 states and 37234 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:52,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:52,032 INFO L93 Difference]: Finished difference Result 19686 states and 64539 transitions. [2021-05-22 02:57:52,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-22 02:57:52,032 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:57:52,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:52,062 INFO L225 Difference]: With dead ends: 19686 [2021-05-22 02:57:52,062 INFO L226 Difference]: Without dead ends: 19566 [2021-05-22 02:57:52,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 1499.1ms TimeCoverageRelationStatistics Valid=562, Invalid=2630, Unknown=0, NotChecked=0, Total=3192 [2021-05-22 02:57:52,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19566 states. [2021-05-22 02:57:52,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19566 to 11147. [2021-05-22 02:57:52,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11147 states, 11146 states have (on average 3.3384173694598958) internal successors, (37210), 11146 states have internal predecessors, (37210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:52,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11147 states to 11147 states and 37210 transitions. [2021-05-22 02:57:52,350 INFO L78 Accepts]: Start accepts. Automaton has 11147 states and 37210 transitions. Word has length 36 [2021-05-22 02:57:52,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:52,350 INFO L482 AbstractCegarLoop]: Abstraction has 11147 states and 37210 transitions. [2021-05-22 02:57:52,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:52,350 INFO L276 IsEmpty]: Start isEmpty. Operand 11147 states and 37210 transitions. [2021-05-22 02:57:52,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:57:52,362 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:52,362 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:52,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1244,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:52,562 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:52,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:52,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1648635209, now seen corresponding path program 157 times [2021-05-22 02:57:52,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:52,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902959826] [2021-05-22 02:57:52,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:52,797 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:52,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:52,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902959826] [2021-05-22 02:57:52,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902959826] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:52,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181099029] [2021-05-22 02:57:52,797 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:52,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:52,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:57:52,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:53,614 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:53,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181099029] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:53,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:53,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-22 02:57:53,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832145265] [2021-05-22 02:57:53,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:57:53,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:53,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:57:53,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1137, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:57:53,615 INFO L87 Difference]: Start difference. First operand 11147 states and 37210 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:55,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:55,247 INFO L93 Difference]: Finished difference Result 18416 states and 60517 transitions. [2021-05-22 02:57:55,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-22 02:57:55,247 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:57:55,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:55,275 INFO L225 Difference]: With dead ends: 18416 [2021-05-22 02:57:55,276 INFO L226 Difference]: Without dead ends: 18321 [2021-05-22 02:57:55,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1659.6ms TimeCoverageRelationStatistics Valid=615, Invalid=3417, Unknown=0, NotChecked=0, Total=4032 [2021-05-22 02:57:55,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18321 states. [2021-05-22 02:57:55,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18321 to 11183. [2021-05-22 02:57:55,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11183 states, 11182 states have (on average 3.338579860490073) internal successors, (37332), 11182 states have internal predecessors, (37332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:55,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11183 states to 11183 states and 37332 transitions. [2021-05-22 02:57:55,558 INFO L78 Accepts]: Start accepts. Automaton has 11183 states and 37332 transitions. Word has length 36 [2021-05-22 02:57:55,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:55,558 INFO L482 AbstractCegarLoop]: Abstraction has 11183 states and 37332 transitions. [2021-05-22 02:57:55,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:55,559 INFO L276 IsEmpty]: Start isEmpty. Operand 11183 states and 37332 transitions. [2021-05-22 02:57:55,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:57:55,571 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:55,571 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:55,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1256 [2021-05-22 02:57:55,772 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:55,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:55,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1928764087, now seen corresponding path program 158 times [2021-05-22 02:57:55,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:55,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109847797] [2021-05-22 02:57:55,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:55,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:56,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:56,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109847797] [2021-05-22 02:57:56,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109847797] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:56,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38239615] [2021-05-22 02:57:56,026 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:56,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:57:56,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:57:56,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:57:56,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:56,704 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:56,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38239615] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:56,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:56,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-05-22 02:57:56,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290626239] [2021-05-22 02:57:56,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:57:56,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:56,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:57:56,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:57:56,705 INFO L87 Difference]: Start difference. First operand 11183 states and 37332 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:58,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:58,784 INFO L93 Difference]: Finished difference Result 22457 states and 73215 transitions. [2021-05-22 02:57:58,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-22 02:57:58,784 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:57:58,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:58,818 INFO L225 Difference]: With dead ends: 22457 [2021-05-22 02:57:58,818 INFO L226 Difference]: Without dead ends: 22313 [2021-05-22 02:57:58,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 1849.7ms TimeCoverageRelationStatistics Valid=703, Invalid=3587, Unknown=0, NotChecked=0, Total=4290 [2021-05-22 02:57:58,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22313 states. [2021-05-22 02:57:59,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22313 to 11051. [2021-05-22 02:57:59,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11051 states, 11050 states have (on average 3.3337556561085973) internal successors, (36838), 11050 states have internal predecessors, (36838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:59,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11051 states to 11051 states and 36838 transitions. [2021-05-22 02:57:59,067 INFO L78 Accepts]: Start accepts. Automaton has 11051 states and 36838 transitions. Word has length 36 [2021-05-22 02:57:59,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:59,067 INFO L482 AbstractCegarLoop]: Abstraction has 11051 states and 36838 transitions. [2021-05-22 02:57:59,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:59,067 INFO L276 IsEmpty]: Start isEmpty. Operand 11051 states and 36838 transitions. [2021-05-22 02:57:59,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:57:59,146 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:59,146 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:59,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1268 [2021-05-22 02:57:59,347 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:59,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:59,347 INFO L82 PathProgramCache]: Analyzing trace with hash 546993293, now seen corresponding path program 159 times [2021-05-22 02:57:59,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:59,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730075267] [2021-05-22 02:57:59,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:59,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:59,561 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:59,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:59,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730075267] [2021-05-22 02:57:59,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730075267] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:59,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008195931] [2021-05-22 02:57:59,561 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:59,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-22 02:57:59,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:57:59,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:57:59,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:58:00,214 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:00,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008195931] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:00,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:58:00,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-05-22 02:58:00,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001458828] [2021-05-22 02:58:00,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-22 02:58:00,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:58:00,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-22 02:58:00,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=957, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:58:00,215 INFO L87 Difference]: Start difference. First operand 11051 states and 36838 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:01,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:58:01,944 INFO L93 Difference]: Finished difference Result 17392 states and 57477 transitions. [2021-05-22 02:58:01,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-22 02:58:01,945 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:58:01,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:58:01,972 INFO L225 Difference]: With dead ends: 17392 [2021-05-22 02:58:01,972 INFO L226 Difference]: Without dead ends: 17272 [2021-05-22 02:58:01,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 1489.2ms TimeCoverageRelationStatistics Valid=529, Invalid=3131, Unknown=0, NotChecked=0, Total=3660 [2021-05-22 02:58:01,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17272 states. [2021-05-22 02:58:02,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17272 to 11043. [2021-05-22 02:58:02,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11043 states, 11042 states have (on average 3.333997464227495) internal successors, (36814), 11042 states have internal predecessors, (36814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:02,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11043 states to 11043 states and 36814 transitions. [2021-05-22 02:58:02,172 INFO L78 Accepts]: Start accepts. Automaton has 11043 states and 36814 transitions. Word has length 36 [2021-05-22 02:58:02,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:58:02,172 INFO L482 AbstractCegarLoop]: Abstraction has 11043 states and 36814 transitions. [2021-05-22 02:58:02,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:02,172 INFO L276 IsEmpty]: Start isEmpty. Operand 11043 states and 36814 transitions. [2021-05-22 02:58:02,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:58:02,184 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:58:02,184 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:58:02,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1280 [2021-05-22 02:58:02,385 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:58:02,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:58:02,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1786449251, now seen corresponding path program 160 times [2021-05-22 02:58:02,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:58:02,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350464193] [2021-05-22 02:58:02,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:58:02,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:58:02,611 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:02,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:58:02,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350464193] [2021-05-22 02:58:02,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350464193] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:02,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920726080] [2021-05-22 02:58:02,612 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:58:02,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:58:02,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:58:02,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:58:02,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:58:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:03,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920726080] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:03,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:58:03,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 02:58:03,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112395251] [2021-05-22 02:58:03,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:58:03,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:58:03,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:58:03,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1000, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:58:03,328 INFO L87 Difference]: Start difference. First operand 11043 states and 36814 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:05,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:58:05,686 INFO L93 Difference]: Finished difference Result 18424 states and 60727 transitions. [2021-05-22 02:58:05,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-22 02:58:05,686 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:58:05,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:58:05,716 INFO L225 Difference]: With dead ends: 18424 [2021-05-22 02:58:05,716 INFO L226 Difference]: Without dead ends: 18304 [2021-05-22 02:58:05,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 2001.2ms TimeCoverageRelationStatistics Valid=695, Invalid=3465, Unknown=0, NotChecked=0, Total=4160 [2021-05-22 02:58:05,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18304 states. [2021-05-22 02:58:05,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18304 to 11191. [2021-05-22 02:58:05,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11191 states, 11190 states have (on average 3.3335120643431635) internal successors, (37302), 11190 states have internal predecessors, (37302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:05,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11191 states to 11191 states and 37302 transitions. [2021-05-22 02:58:05,941 INFO L78 Accepts]: Start accepts. Automaton has 11191 states and 37302 transitions. Word has length 36 [2021-05-22 02:58:05,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:58:05,941 INFO L482 AbstractCegarLoop]: Abstraction has 11191 states and 37302 transitions. [2021-05-22 02:58:05,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:05,941 INFO L276 IsEmpty]: Start isEmpty. Operand 11191 states and 37302 transitions. [2021-05-22 02:58:05,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:58:05,953 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:58:05,953 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:58:06,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1292,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:58:06,154 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:58:06,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:58:06,154 INFO L82 PathProgramCache]: Analyzing trace with hash 207810913, now seen corresponding path program 161 times [2021-05-22 02:58:06,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:58:06,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022838674] [2021-05-22 02:58:06,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:58:06,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:58:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:06,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:58:06,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022838674] [2021-05-22 02:58:06,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022838674] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:06,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832772059] [2021-05-22 02:58:06,471 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:58:06,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 02:58:06,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:58:06,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-22 02:58:06,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:58:07,090 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:07,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832772059] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:07,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:58:07,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 02:58:07,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53587426] [2021-05-22 02:58:07,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:58:07,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:58:07,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:58:07,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:58:07,091 INFO L87 Difference]: Start difference. First operand 11191 states and 37302 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:09,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:58:09,848 INFO L93 Difference]: Finished difference Result 20352 states and 64972 transitions. [2021-05-22 02:58:09,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-22 02:58:09,848 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:58:09,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:58:09,879 INFO L225 Difference]: With dead ends: 20352 [2021-05-22 02:58:09,879 INFO L226 Difference]: Without dead ends: 20245 [2021-05-22 02:58:09,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1893 ImplicationChecksByTransitivity, 2464.3ms TimeCoverageRelationStatistics Valid=1011, Invalid=4841, Unknown=0, NotChecked=0, Total=5852 [2021-05-22 02:58:09,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20245 states. [2021-05-22 02:58:10,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20245 to 11371. [2021-05-22 02:58:10,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11371 states, 11370 states have (on average 3.3333333333333335) internal successors, (37900), 11370 states have internal predecessors, (37900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:10,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11371 states to 11371 states and 37900 transitions. [2021-05-22 02:58:10,108 INFO L78 Accepts]: Start accepts. Automaton has 11371 states and 37900 transitions. Word has length 36 [2021-05-22 02:58:10,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:58:10,109 INFO L482 AbstractCegarLoop]: Abstraction has 11371 states and 37900 transitions. [2021-05-22 02:58:10,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:10,109 INFO L276 IsEmpty]: Start isEmpty. Operand 11371 states and 37900 transitions. [2021-05-22 02:58:10,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:58:10,121 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:58:10,121 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:58:10,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1304 [2021-05-22 02:58:10,322 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:58:10,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:58:10,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1491951973, now seen corresponding path program 162 times [2021-05-22 02:58:10,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:58:10,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021559863] [2021-05-22 02:58:10,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:58:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:58:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:10,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:58:10,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021559863] [2021-05-22 02:58:10,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021559863] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:10,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790355049] [2021-05-22 02:58:10,575 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:58:10,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:58:10,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:58:10,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:58:10,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:58:11,119 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:11,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790355049] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:11,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:58:11,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-22 02:58:11,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312432924] [2021-05-22 02:58:11,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:58:11,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:58:11,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:58:11,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:58:11,120 INFO L87 Difference]: Start difference. First operand 11371 states and 37900 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:15,045 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-05-22 02:58:16,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:58:16,318 INFO L93 Difference]: Finished difference Result 21226 states and 67124 transitions. [2021-05-22 02:58:16,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-05-22 02:58:16,318 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:58:16,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:58:16,346 INFO L225 Difference]: With dead ends: 21226 [2021-05-22 02:58:16,346 INFO L226 Difference]: Without dead ends: 20979 [2021-05-22 02:58:16,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4791 ImplicationChecksByTransitivity, 4243.3ms TimeCoverageRelationStatistics Valid=1866, Invalid=11706, Unknown=0, NotChecked=0, Total=13572 [2021-05-22 02:58:16,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20979 states. [2021-05-22 02:58:16,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20979 to 11396. [2021-05-22 02:58:16,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11396 states, 11395 states have (on average 3.334971478718736) internal successors, (38002), 11395 states have internal predecessors, (38002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:16,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11396 states to 11396 states and 38002 transitions. [2021-05-22 02:58:16,589 INFO L78 Accepts]: Start accepts. Automaton has 11396 states and 38002 transitions. Word has length 36 [2021-05-22 02:58:16,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:58:16,589 INFO L482 AbstractCegarLoop]: Abstraction has 11396 states and 38002 transitions. [2021-05-22 02:58:16,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:16,589 INFO L276 IsEmpty]: Start isEmpty. Operand 11396 states and 38002 transitions. [2021-05-22 02:58:16,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:58:16,602 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:58:16,602 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:58:16,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1308,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:58:16,802 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:58:16,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:58:16,802 INFO L82 PathProgramCache]: Analyzing trace with hash -406577051, now seen corresponding path program 163 times [2021-05-22 02:58:16,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:58:16,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438052477] [2021-05-22 02:58:16,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:58:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:58:17,062 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:17,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:58:17,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438052477] [2021-05-22 02:58:17,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438052477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:17,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967937372] [2021-05-22 02:58:17,062 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:58:17,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:58:17,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:58:17,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:58:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:17,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967937372] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:17,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:58:17,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-05-22 02:58:17,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676201719] [2021-05-22 02:58:17,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-22 02:58:17,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:58:17,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-22 02:58:17,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1176, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:58:17,601 INFO L87 Difference]: Start difference. First operand 11396 states and 38002 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:18,864 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 20 [2021-05-22 02:58:22,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:58:22,124 INFO L93 Difference]: Finished difference Result 21113 states and 66892 transitions. [2021-05-22 02:58:22,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-22 02:58:22,124 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:58:22,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:58:22,155 INFO L225 Difference]: With dead ends: 21113 [2021-05-22 02:58:22,155 INFO L226 Difference]: Without dead ends: 20928 [2021-05-22 02:58:22,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3909 ImplicationChecksByTransitivity, 3865.3ms TimeCoverageRelationStatistics Valid=1899, Invalid=9657, Unknown=0, NotChecked=0, Total=11556 [2021-05-22 02:58:22,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20928 states. [2021-05-22 02:58:22,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20928 to 11436. [2021-05-22 02:58:22,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11436 states, 11435 states have (on average 3.336073458679493) internal successors, (38148), 11435 states have internal predecessors, (38148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:22,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11436 states to 11436 states and 38148 transitions. [2021-05-22 02:58:22,403 INFO L78 Accepts]: Start accepts. Automaton has 11436 states and 38148 transitions. Word has length 36 [2021-05-22 02:58:22,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:58:22,403 INFO L482 AbstractCegarLoop]: Abstraction has 11436 states and 38148 transitions. [2021-05-22 02:58:22,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:22,403 INFO L276 IsEmpty]: Start isEmpty. Operand 11436 states and 38148 transitions. [2021-05-22 02:58:22,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:58:22,416 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:58:22,416 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:58:22,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1312 [2021-05-22 02:58:22,617 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:58:22,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:58:22,617 INFO L82 PathProgramCache]: Analyzing trace with hash 515125089, now seen corresponding path program 164 times [2021-05-22 02:58:22,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:58:22,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991765896] [2021-05-22 02:58:22,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:58:22,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:58:22,939 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:22,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:58:22,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991765896] [2021-05-22 02:58:22,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991765896] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:22,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169701105] [2021-05-22 02:58:22,939 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:58:22,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:58:22,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:58:22,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:58:22,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:58:23,456 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:23,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169701105] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:23,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:58:23,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-05-22 02:58:23,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813512830] [2021-05-22 02:58:23,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:58:23,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:58:23,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:58:23,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1096, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:58:23,457 INFO L87 Difference]: Start difference. First operand 11436 states and 38148 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:28,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:58:28,208 INFO L93 Difference]: Finished difference Result 21255 states and 67401 transitions. [2021-05-22 02:58:28,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-22 02:58:28,209 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:58:28,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:58:28,237 INFO L225 Difference]: With dead ends: 21255 [2021-05-22 02:58:28,238 INFO L226 Difference]: Without dead ends: 20974 [2021-05-22 02:58:28,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4174 ImplicationChecksByTransitivity, 4036.9ms TimeCoverageRelationStatistics Valid=2087, Invalid=10123, Unknown=0, NotChecked=0, Total=12210 [2021-05-22 02:58:28,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20974 states. [2021-05-22 02:58:28,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20974 to 11438. [2021-05-22 02:58:28,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11438 states, 11437 states have (on average 3.3360146891667397) internal successors, (38154), 11437 states have internal predecessors, (38154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:28,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11438 states to 11438 states and 38154 transitions. [2021-05-22 02:58:28,480 INFO L78 Accepts]: Start accepts. Automaton has 11438 states and 38154 transitions. Word has length 36 [2021-05-22 02:58:28,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:58:28,480 INFO L482 AbstractCegarLoop]: Abstraction has 11438 states and 38154 transitions. [2021-05-22 02:58:28,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:28,480 INFO L276 IsEmpty]: Start isEmpty. Operand 11438 states and 38154 transitions. [2021-05-22 02:58:28,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:58:28,493 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:58:28,493 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:58:28,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1316 [2021-05-22 02:58:28,694 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:58:28,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:58:28,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1318193907, now seen corresponding path program 165 times [2021-05-22 02:58:28,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:58:28,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272429964] [2021-05-22 02:58:28,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:58:28,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:58:29,012 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:29,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:58:29,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272429964] [2021-05-22 02:58:29,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272429964] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:29,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726791657] [2021-05-22 02:58:29,013 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:58:29,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:58:29,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:58:29,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:58:29,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:58:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:29,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726791657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:29,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:58:29,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-05-22 02:58:29,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721845270] [2021-05-22 02:58:29,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:58:29,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:58:29,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:58:29,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:58:29,584 INFO L87 Difference]: Start difference. First operand 11438 states and 38154 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:32,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:58:32,478 INFO L93 Difference]: Finished difference Result 21744 states and 69783 transitions. [2021-05-22 02:58:32,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-22 02:58:32,478 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:58:32,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:58:32,510 INFO L225 Difference]: With dead ends: 21744 [2021-05-22 02:58:32,510 INFO L226 Difference]: Without dead ends: 21600 [2021-05-22 02:58:32,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2107 ImplicationChecksByTransitivity, 2629.0ms TimeCoverageRelationStatistics Valid=1139, Invalid=5341, Unknown=0, NotChecked=0, Total=6480 [2021-05-22 02:58:32,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21600 states. [2021-05-22 02:58:32,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21600 to 11488. [2021-05-22 02:58:32,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11488 states, 11487 states have (on average 3.3368155305998086) internal successors, (38330), 11487 states have internal predecessors, (38330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:32,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11488 states to 11488 states and 38330 transitions. [2021-05-22 02:58:32,748 INFO L78 Accepts]: Start accepts. Automaton has 11488 states and 38330 transitions. Word has length 36 [2021-05-22 02:58:32,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:58:32,748 INFO L482 AbstractCegarLoop]: Abstraction has 11488 states and 38330 transitions. [2021-05-22 02:58:32,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:32,748 INFO L276 IsEmpty]: Start isEmpty. Operand 11488 states and 38330 transitions. [2021-05-22 02:58:32,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:58:32,761 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:58:32,761 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:58:32,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1320 [2021-05-22 02:58:32,961 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:58:32,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:58:32,962 INFO L82 PathProgramCache]: Analyzing trace with hash -34052847, now seen corresponding path program 166 times [2021-05-22 02:58:32,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:58:32,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154958621] [2021-05-22 02:58:32,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:58:32,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:58:33,233 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:33,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:58:33,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154958621] [2021-05-22 02:58:33,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154958621] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:33,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332963191] [2021-05-22 02:58:33,233 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:58:33,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:58:33,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:58:33,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:58:33,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:58:33,773 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:33,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332963191] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:33,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:58:33,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-05-22 02:58:33,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645930053] [2021-05-22 02:58:33,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-22 02:58:33,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:58:33,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-22 02:58:33,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1192, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:58:33,774 INFO L87 Difference]: Start difference. First operand 11488 states and 38330 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:38,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:58:38,436 INFO L93 Difference]: Finished difference Result 22452 states and 70987 transitions. [2021-05-22 02:58:38,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-05-22 02:58:38,436 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:58:38,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:58:38,469 INFO L225 Difference]: With dead ends: 22452 [2021-05-22 02:58:38,469 INFO L226 Difference]: Without dead ends: 22279 [2021-05-22 02:58:38,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4357 ImplicationChecksByTransitivity, 3923.3ms TimeCoverageRelationStatistics Valid=1874, Invalid=10558, Unknown=0, NotChecked=0, Total=12432 [2021-05-22 02:58:38,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22279 states. [2021-05-22 02:58:38,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22279 to 11506. [2021-05-22 02:58:38,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11506 states, 11505 states have (on average 3.3364624076488485) internal successors, (38386), 11505 states have internal predecessors, (38386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:38,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11506 states to 11506 states and 38386 transitions. [2021-05-22 02:58:38,769 INFO L78 Accepts]: Start accepts. Automaton has 11506 states and 38386 transitions. Word has length 36 [2021-05-22 02:58:38,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:58:38,769 INFO L482 AbstractCegarLoop]: Abstraction has 11506 states and 38386 transitions. [2021-05-22 02:58:38,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:38,769 INFO L276 IsEmpty]: Start isEmpty. Operand 11506 states and 38386 transitions. [2021-05-22 02:58:38,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:58:38,782 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:58:38,782 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:58:38,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1327,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:58:38,983 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:58:38,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:58:38,983 INFO L82 PathProgramCache]: Analyzing trace with hash 887649293, now seen corresponding path program 167 times [2021-05-22 02:58:38,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:58:38,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800563288] [2021-05-22 02:58:38,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:58:38,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:58:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:39,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:58:39,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800563288] [2021-05-22 02:58:39,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800563288] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:39,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091445012] [2021-05-22 02:58:39,256 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:58:39,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 02:58:39,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:58:39,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:58:39,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:58:39,798 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:39,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091445012] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:39,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:58:39,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-05-22 02:58:39,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096831294] [2021-05-22 02:58:39,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-22 02:58:39,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:58:39,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-22 02:58:39,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1185, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:58:39,799 INFO L87 Difference]: Start difference. First operand 11506 states and 38386 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:44,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:58:44,970 INFO L93 Difference]: Finished difference Result 23227 states and 73376 transitions. [2021-05-22 02:58:44,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-05-22 02:58:44,970 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:58:44,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:58:45,003 INFO L225 Difference]: With dead ends: 23227 [2021-05-22 02:58:45,003 INFO L226 Difference]: Without dead ends: 22979 [2021-05-22 02:58:45,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4641 ImplicationChecksByTransitivity, 4288.7ms TimeCoverageRelationStatistics Valid=2062, Invalid=11278, Unknown=0, NotChecked=0, Total=13340 [2021-05-22 02:58:45,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22979 states. [2021-05-22 02:58:45,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22979 to 11503. [2021-05-22 02:58:45,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11503 states, 11502 states have (on average 3.3362893409841767) internal successors, (38374), 11502 states have internal predecessors, (38374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:45,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11503 states to 11503 states and 38374 transitions. [2021-05-22 02:58:45,259 INFO L78 Accepts]: Start accepts. Automaton has 11503 states and 38374 transitions. Word has length 36 [2021-05-22 02:58:45,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:58:45,259 INFO L482 AbstractCegarLoop]: Abstraction has 11503 states and 38374 transitions. [2021-05-22 02:58:45,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:45,259 INFO L276 IsEmpty]: Start isEmpty. Operand 11503 states and 38374 transitions. [2021-05-22 02:58:45,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:58:45,272 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:58:45,272 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:58:45,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1331 [2021-05-22 02:58:45,473 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:58:45,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:58:45,473 INFO L82 PathProgramCache]: Analyzing trace with hash -468537303, now seen corresponding path program 168 times [2021-05-22 02:58:45,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:58:45,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309504635] [2021-05-22 02:58:45,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:58:45,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:58:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:45,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:58:45,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309504635] [2021-05-22 02:58:45,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309504635] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:45,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092782044] [2021-05-22 02:58:45,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:58:45,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:58:45,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:58:45,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:58:45,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:58:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:46,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092782044] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:46,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:58:46,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-05-22 02:58:46,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462785448] [2021-05-22 02:58:46,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-22 02:58:46,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:58:46,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-22 02:58:46,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=966, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:58:46,293 INFO L87 Difference]: Start difference. First operand 11503 states and 38374 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:48,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:58:48,032 INFO L93 Difference]: Finished difference Result 13637 states and 44686 transitions. [2021-05-22 02:58:48,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-22 02:58:48,032 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:58:48,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:58:48,053 INFO L225 Difference]: With dead ends: 13637 [2021-05-22 02:58:48,053 INFO L226 Difference]: Without dead ends: 13523 [2021-05-22 02:58:48,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1426.3ms TimeCoverageRelationStatistics Valid=417, Invalid=2445, Unknown=0, NotChecked=0, Total=2862 [2021-05-22 02:58:48,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13523 states. [2021-05-22 02:58:48,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13523 to 11535. [2021-05-22 02:58:48,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11535 states, 11534 states have (on average 3.336916941217271) internal successors, (38488), 11534 states have internal predecessors, (38488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:48,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11535 states to 11535 states and 38488 transitions. [2021-05-22 02:58:48,235 INFO L78 Accepts]: Start accepts. Automaton has 11535 states and 38488 transitions. Word has length 36 [2021-05-22 02:58:48,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:58:48,235 INFO L482 AbstractCegarLoop]: Abstraction has 11535 states and 38488 transitions. [2021-05-22 02:58:48,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:48,235 INFO L276 IsEmpty]: Start isEmpty. Operand 11535 states and 38488 transitions. [2021-05-22 02:58:48,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:58:48,249 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:58:48,249 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:58:48,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1335,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:58:48,449 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:58:48,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:58:48,450 INFO L82 PathProgramCache]: Analyzing trace with hash 383054801, now seen corresponding path program 169 times [2021-05-22 02:58:48,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:58:48,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027435414] [2021-05-22 02:58:48,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:58:48,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:58:48,756 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:48,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:58:48,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027435414] [2021-05-22 02:58:48,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027435414] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:48,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925632084] [2021-05-22 02:58:48,756 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:58:48,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:58:48,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:58:48,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:58:49,326 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:49,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925632084] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:49,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:58:49,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 02:58:49,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415867965] [2021-05-22 02:58:49,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:58:49,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:58:49,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:58:49,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:58:49,327 INFO L87 Difference]: Start difference. First operand 11535 states and 38488 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:50,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:58:50,735 INFO L93 Difference]: Finished difference Result 16714 states and 54896 transitions. [2021-05-22 02:58:50,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-22 02:58:50,735 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:58:50,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:58:50,760 INFO L225 Difference]: With dead ends: 16714 [2021-05-22 02:58:50,760 INFO L226 Difference]: Without dead ends: 16594 [2021-05-22 02:58:50,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1378.6ms TimeCoverageRelationStatistics Valid=450, Invalid=2202, Unknown=0, NotChecked=0, Total=2652 [2021-05-22 02:58:50,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16594 states. [2021-05-22 02:58:50,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16594 to 11539. [2021-05-22 02:58:50,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11539 states, 11538 states have (on average 3.3368001386722135) internal successors, (38500), 11538 states have internal predecessors, (38500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:50,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11539 states to 11539 states and 38500 transitions. [2021-05-22 02:58:50,944 INFO L78 Accepts]: Start accepts. Automaton has 11539 states and 38500 transitions. Word has length 36 [2021-05-22 02:58:50,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:58:50,944 INFO L482 AbstractCegarLoop]: Abstraction has 11539 states and 38500 transitions. [2021-05-22 02:58:50,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:50,944 INFO L276 IsEmpty]: Start isEmpty. Operand 11539 states and 38500 transitions. [2021-05-22 02:58:50,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:58:50,956 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:58:50,957 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:58:51,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1345 [2021-05-22 02:58:51,157 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:58:51,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:58:51,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1189866523, now seen corresponding path program 170 times [2021-05-22 02:58:51,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:58:51,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420955879] [2021-05-22 02:58:51,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:58:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:58:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:51,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:58:51,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420955879] [2021-05-22 02:58:51,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420955879] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:51,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146216881] [2021-05-22 02:58:51,411 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:58:51,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:58:51,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:58:51,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:58:51,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:58:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:51,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146216881] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:51,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:58:51,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-22 02:58:51,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112946862] [2021-05-22 02:58:51,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:58:51,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:58:51,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:58:51,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:58:51,907 INFO L87 Difference]: Start difference. First operand 11539 states and 38500 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:54,666 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 26 [2021-05-22 02:58:55,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:58:55,057 INFO L93 Difference]: Finished difference Result 13195 states and 43100 transitions. [2021-05-22 02:58:55,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-22 02:58:55,057 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:58:55,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:58:55,075 INFO L225 Difference]: With dead ends: 13195 [2021-05-22 02:58:55,075 INFO L226 Difference]: Without dead ends: 12999 [2021-05-22 02:58:55,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1797 ImplicationChecksByTransitivity, 2451.1ms TimeCoverageRelationStatistics Valid=746, Invalid=5574, Unknown=0, NotChecked=0, Total=6320 [2021-05-22 02:58:55,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12999 states. [2021-05-22 02:58:55,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12999 to 11593. [2021-05-22 02:58:55,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11593 states, 11592 states have (on average 3.3358350586611456) internal successors, (38669), 11592 states have internal predecessors, (38669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:55,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11593 states to 11593 states and 38669 transitions. [2021-05-22 02:58:55,253 INFO L78 Accepts]: Start accepts. Automaton has 11593 states and 38669 transitions. Word has length 36 [2021-05-22 02:58:55,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:58:55,253 INFO L482 AbstractCegarLoop]: Abstraction has 11593 states and 38669 transitions. [2021-05-22 02:58:55,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:55,253 INFO L276 IsEmpty]: Start isEmpty. Operand 11593 states and 38669 transitions. [2021-05-22 02:58:55,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:58:55,266 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:58:55,266 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:58:55,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1355 [2021-05-22 02:58:55,467 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:58:55,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:58:55,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1146359181, now seen corresponding path program 171 times [2021-05-22 02:58:55,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:58:55,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180080663] [2021-05-22 02:58:55,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:58:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:58:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:55,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:58:55,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180080663] [2021-05-22 02:58:55,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180080663] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:55,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149521793] [2021-05-22 02:58:55,716 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:58:55,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:58:55,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:58:55,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:58:55,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:58:56,201 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:56,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149521793] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:56,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:58:56,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-22 02:58:56,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993367753] [2021-05-22 02:58:56,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:58:56,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:58:56,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:58:56,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:58:56,202 INFO L87 Difference]: Start difference. First operand 11593 states and 38669 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:58,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:58:58,760 INFO L93 Difference]: Finished difference Result 14199 states and 46179 transitions. [2021-05-22 02:58:58,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-22 02:58:58,760 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:58:58,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:58:58,780 INFO L225 Difference]: With dead ends: 14199 [2021-05-22 02:58:58,780 INFO L226 Difference]: Without dead ends: 14003 [2021-05-22 02:58:58,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 2015.4ms TimeCoverageRelationStatistics Valid=792, Invalid=5060, Unknown=0, NotChecked=0, Total=5852 [2021-05-22 02:58:58,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14003 states. [2021-05-22 02:58:58,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14003 to 11627. [2021-05-22 02:58:58,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11627 states, 11626 states have (on average 3.33700326853604) internal successors, (38796), 11626 states have internal predecessors, (38796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:58,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11627 states to 11627 states and 38796 transitions. [2021-05-22 02:58:58,960 INFO L78 Accepts]: Start accepts. Automaton has 11627 states and 38796 transitions. Word has length 36 [2021-05-22 02:58:58,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:58:58,960 INFO L482 AbstractCegarLoop]: Abstraction has 11627 states and 38796 transitions. [2021-05-22 02:58:58,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:58,960 INFO L276 IsEmpty]: Start isEmpty. Operand 11627 states and 38796 transitions. [2021-05-22 02:58:58,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:58:58,973 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:58:58,973 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:58:59,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1359 [2021-05-22 02:58:59,173 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:58:59,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:58:59,173 INFO L82 PathProgramCache]: Analyzing trace with hash 114827301, now seen corresponding path program 172 times [2021-05-22 02:58:59,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:58:59,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115996969] [2021-05-22 02:58:59,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:58:59,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:58:59,486 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:59,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:58:59,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115996969] [2021-05-22 02:58:59,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115996969] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:59,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208761632] [2021-05-22 02:58:59,487 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:58:59,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:58:59,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:58:59,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:58:59,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:58:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:59,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208761632] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:59,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:58:59,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 02:58:59,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459741676] [2021-05-22 02:58:59,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:58:59,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:58:59,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:58:59,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:58:59,982 INFO L87 Difference]: Start difference. First operand 11627 states and 38796 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:01,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:59:01,699 INFO L93 Difference]: Finished difference Result 15890 states and 51993 transitions. [2021-05-22 02:59:01,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-22 02:59:01,699 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:59:01,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:59:01,723 INFO L225 Difference]: With dead ends: 15890 [2021-05-22 02:59:01,723 INFO L226 Difference]: Without dead ends: 15721 [2021-05-22 02:59:01,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1653.3ms TimeCoverageRelationStatistics Valid=504, Invalid=3036, Unknown=0, NotChecked=0, Total=3540 [2021-05-22 02:59:01,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15721 states. [2021-05-22 02:59:01,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15721 to 11624. [2021-05-22 02:59:01,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11624 states, 11623 states have (on average 3.3365740342424504) internal successors, (38781), 11623 states have internal predecessors, (38781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:01,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11624 states to 11624 states and 38781 transitions. [2021-05-22 02:59:01,920 INFO L78 Accepts]: Start accepts. Automaton has 11624 states and 38781 transitions. Word has length 36 [2021-05-22 02:59:01,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:59:01,920 INFO L482 AbstractCegarLoop]: Abstraction has 11624 states and 38781 transitions. [2021-05-22 02:59:01,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:01,920 INFO L276 IsEmpty]: Start isEmpty. Operand 11624 states and 38781 transitions. [2021-05-22 02:59:01,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:59:01,933 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:59:01,933 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:59:02,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1363 [2021-05-22 02:59:02,133 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:59:02,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:59:02,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1397455009, now seen corresponding path program 173 times [2021-05-22 02:59:02,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:59:02,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903632341] [2021-05-22 02:59:02,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:59:02,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:59:02,447 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:02,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:59:02,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903632341] [2021-05-22 02:59:02,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903632341] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:02,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106330908] [2021-05-22 02:59:02,447 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:59:02,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:59:02,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:59:02,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:59:02,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:59:03,006 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:03,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106330908] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:03,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:59:03,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-05-22 02:59:03,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063952404] [2021-05-22 02:59:03,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-22 02:59:03,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:59:03,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-22 02:59:03,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1235, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:59:03,007 INFO L87 Difference]: Start difference. First operand 11624 states and 38781 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:06,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:59:06,612 INFO L93 Difference]: Finished difference Result 14094 states and 45590 transitions. [2021-05-22 02:59:06,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-22 02:59:06,612 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:59:06,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:59:06,632 INFO L225 Difference]: With dead ends: 14094 [2021-05-22 02:59:06,632 INFO L226 Difference]: Without dead ends: 13879 [2021-05-22 02:59:06,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2105 ImplicationChecksByTransitivity, 2775.4ms TimeCoverageRelationStatistics Valid=878, Invalid=6432, Unknown=0, NotChecked=0, Total=7310 [2021-05-22 02:59:06,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13879 states. [2021-05-22 02:59:06,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13879 to 11726. [2021-05-22 02:59:06,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11726 states, 11725 states have (on average 3.3335607675906185) internal successors, (39086), 11725 states have internal predecessors, (39086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:06,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11726 states to 11726 states and 39086 transitions. [2021-05-22 02:59:06,831 INFO L78 Accepts]: Start accepts. Automaton has 11726 states and 39086 transitions. Word has length 36 [2021-05-22 02:59:06,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:59:06,831 INFO L482 AbstractCegarLoop]: Abstraction has 11726 states and 39086 transitions. [2021-05-22 02:59:06,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:06,831 INFO L276 IsEmpty]: Start isEmpty. Operand 11726 states and 39086 transitions. [2021-05-22 02:59:06,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:59:06,845 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:59:06,846 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:59:07,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1368 [2021-05-22 02:59:07,058 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:59:07,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:59:07,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1701030301, now seen corresponding path program 174 times [2021-05-22 02:59:07,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:59:07,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376774647] [2021-05-22 02:59:07,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:59:07,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:59:07,313 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:07,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:59:07,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376774647] [2021-05-22 02:59:07,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376774647] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:07,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443369965] [2021-05-22 02:59:07,314 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:59:07,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:59:07,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:59:07,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:59:07,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:59:07,855 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:07,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443369965] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:07,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:59:07,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-05-22 02:59:07,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158057028] [2021-05-22 02:59:07,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:59:07,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:59:07,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:59:07,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1163, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:59:07,856 INFO L87 Difference]: Start difference. First operand 11726 states and 39086 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:11,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:59:11,511 INFO L93 Difference]: Finished difference Result 15383 states and 49434 transitions. [2021-05-22 02:59:11,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-22 02:59:11,511 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:59:11,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:59:11,532 INFO L225 Difference]: With dead ends: 15383 [2021-05-22 02:59:11,532 INFO L226 Difference]: Without dead ends: 15107 [2021-05-22 02:59:11,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2327 ImplicationChecksByTransitivity, 2741.0ms TimeCoverageRelationStatistics Valid=963, Invalid=6869, Unknown=0, NotChecked=0, Total=7832 [2021-05-22 02:59:11,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15107 states. [2021-05-22 02:59:11,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15107 to 11778. [2021-05-22 02:59:11,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11778 states, 11777 states have (on average 3.335399507514647) internal successors, (39281), 11777 states have internal predecessors, (39281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:11,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11778 states to 11778 states and 39281 transitions. [2021-05-22 02:59:11,726 INFO L78 Accepts]: Start accepts. Automaton has 11778 states and 39281 transitions. Word has length 36 [2021-05-22 02:59:11,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:59:11,727 INFO L482 AbstractCegarLoop]: Abstraction has 11778 states and 39281 transitions. [2021-05-22 02:59:11,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:11,727 INFO L276 IsEmpty]: Start isEmpty. Operand 11778 states and 39281 transitions. [2021-05-22 02:59:11,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:59:11,740 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:59:11,740 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:59:11,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1372,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:59:11,940 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:59:11,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:59:11,940 INFO L82 PathProgramCache]: Analyzing trace with hash 242460745, now seen corresponding path program 175 times [2021-05-22 02:59:11,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:59:11,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43894034] [2021-05-22 02:59:11,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:59:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:59:12,229 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:12,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:59:12,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43894034] [2021-05-22 02:59:12,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43894034] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:12,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560202260] [2021-05-22 02:59:12,229 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:59:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:59:12,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:59:12,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:59:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:12,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560202260] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:12,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:59:12,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-05-22 02:59:12,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309645454] [2021-05-22 02:59:12,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-22 02:59:12,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:59:12,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-22 02:59:12,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1223, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:59:12,787 INFO L87 Difference]: Start difference. First operand 11778 states and 39281 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:15,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:59:15,673 INFO L93 Difference]: Finished difference Result 13752 states and 44667 transitions. [2021-05-22 02:59:15,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-22 02:59:15,674 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:59:15,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:59:15,694 INFO L225 Difference]: With dead ends: 13752 [2021-05-22 02:59:15,694 INFO L226 Difference]: Without dead ends: 13537 [2021-05-22 02:59:15,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1983 ImplicationChecksByTransitivity, 2516.6ms TimeCoverageRelationStatistics Valid=963, Invalid=6009, Unknown=0, NotChecked=0, Total=6972 [2021-05-22 02:59:15,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13537 states. [2021-05-22 02:59:15,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13537 to 11802. [2021-05-22 02:59:15,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11802 states, 11801 states have (on average 3.334717396830777) internal successors, (39353), 11801 states have internal predecessors, (39353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:15,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11802 states to 11802 states and 39353 transitions. [2021-05-22 02:59:15,884 INFO L78 Accepts]: Start accepts. Automaton has 11802 states and 39353 transitions. Word has length 36 [2021-05-22 02:59:15,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:59:15,884 INFO L482 AbstractCegarLoop]: Abstraction has 11802 states and 39353 transitions. [2021-05-22 02:59:15,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:15,884 INFO L276 IsEmpty]: Start isEmpty. Operand 11802 states and 39353 transitions. [2021-05-22 02:59:15,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:59:15,898 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:59:15,898 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:59:16,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1376 [2021-05-22 02:59:16,098 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:59:16,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:59:16,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1664425911, now seen corresponding path program 176 times [2021-05-22 02:59:16,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:59:16,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144029504] [2021-05-22 02:59:16,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:59:16,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:59:16,366 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:16,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:59:16,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144029504] [2021-05-22 02:59:16,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144029504] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:16,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765809080] [2021-05-22 02:59:16,367 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:59:16,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:59:16,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:59:16,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:59:16,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:59:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:16,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765809080] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:16,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:59:16,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-05-22 02:59:16,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131857157] [2021-05-22 02:59:16,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:59:16,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:59:16,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:59:16,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:59:16,909 INFO L87 Difference]: Start difference. First operand 11802 states and 39353 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:21,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:59:21,738 INFO L93 Difference]: Finished difference Result 18328 states and 58520 transitions. [2021-05-22 02:59:21,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-05-22 02:59:21,738 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:59:21,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:59:21,765 INFO L225 Difference]: With dead ends: 18328 [2021-05-22 02:59:21,765 INFO L226 Difference]: Without dead ends: 18047 [2021-05-22 02:59:21,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4376 ImplicationChecksByTransitivity, 3924.7ms TimeCoverageRelationStatistics Valid=1878, Invalid=11004, Unknown=0, NotChecked=0, Total=12882 [2021-05-22 02:59:21,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18047 states. [2021-05-22 02:59:21,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18047 to 11858. [2021-05-22 02:59:21,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11858 states, 11857 states have (on average 3.3380281690140845) internal successors, (39579), 11857 states have internal predecessors, (39579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:21,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11858 states to 11858 states and 39579 transitions. [2021-05-22 02:59:21,991 INFO L78 Accepts]: Start accepts. Automaton has 11858 states and 39579 transitions. Word has length 36 [2021-05-22 02:59:21,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:59:21,991 INFO L482 AbstractCegarLoop]: Abstraction has 11858 states and 39579 transitions. [2021-05-22 02:59:21,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:21,992 INFO L276 IsEmpty]: Start isEmpty. Operand 11858 states and 39579 transitions. [2021-05-22 02:59:22,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:59:22,005 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:59:22,005 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:59:22,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1380 [2021-05-22 02:59:22,205 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:59:22,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:59:22,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1873465715, now seen corresponding path program 177 times [2021-05-22 02:59:22,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:59:22,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845419649] [2021-05-22 02:59:22,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:59:22,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:59:22,510 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:22,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:59:22,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845419649] [2021-05-22 02:59:22,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845419649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:22,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915068140] [2021-05-22 02:59:22,510 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:59:22,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:59:22,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:59:22,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:59:22,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:59:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:22,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915068140] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:22,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:59:22,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-22 02:59:22,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48886044] [2021-05-22 02:59:22,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:59:22,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:59:22,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:59:22,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:59:22,999 INFO L87 Difference]: Start difference. First operand 11858 states and 39579 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:25,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:59:25,444 INFO L93 Difference]: Finished difference Result 14589 states and 47328 transitions. [2021-05-22 02:59:25,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-22 02:59:25,444 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:59:25,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:59:25,466 INFO L225 Difference]: With dead ends: 14589 [2021-05-22 02:59:25,466 INFO L226 Difference]: Without dead ends: 14393 [2021-05-22 02:59:25,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 2117.9ms TimeCoverageRelationStatistics Valid=778, Invalid=5228, Unknown=0, NotChecked=0, Total=6006 [2021-05-22 02:59:25,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14393 states. [2021-05-22 02:59:25,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14393 to 11861. [2021-05-22 02:59:25,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11861 states, 11860 states have (on average 3.3387015177065766) internal successors, (39597), 11860 states have internal predecessors, (39597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:25,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11861 states to 11861 states and 39597 transitions. [2021-05-22 02:59:25,663 INFO L78 Accepts]: Start accepts. Automaton has 11861 states and 39597 transitions. Word has length 36 [2021-05-22 02:59:25,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:59:25,663 INFO L482 AbstractCegarLoop]: Abstraction has 11861 states and 39597 transitions. [2021-05-22 02:59:25,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:25,664 INFO L276 IsEmpty]: Start isEmpty. Operand 11861 states and 39597 transitions. [2021-05-22 02:59:25,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:59:25,677 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:59:25,677 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:59:25,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1384,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:59:25,881 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:59:25,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:59:25,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1389969701, now seen corresponding path program 178 times [2021-05-22 02:59:25,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:59:25,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786689927] [2021-05-22 02:59:25,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:59:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:59:26,226 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:26,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:59:26,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786689927] [2021-05-22 02:59:26,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786689927] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:26,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193636453] [2021-05-22 02:59:26,226 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:59:26,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:59:26,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:59:26,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:59:26,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:59:26,718 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:26,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193636453] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:26,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:59:26,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 02:59:26,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179565063] [2021-05-22 02:59:26,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:59:26,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:59:26,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:59:26,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:59:26,718 INFO L87 Difference]: Start difference. First operand 11861 states and 39597 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:28,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:59:28,684 INFO L93 Difference]: Finished difference Result 15587 states and 51043 transitions. [2021-05-22 02:59:28,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-22 02:59:28,685 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:59:28,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:59:28,708 INFO L225 Difference]: With dead ends: 15587 [2021-05-22 02:59:28,708 INFO L226 Difference]: Without dead ends: 15418 [2021-05-22 02:59:28,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1723.6ms TimeCoverageRelationStatistics Valid=497, Invalid=3043, Unknown=0, NotChecked=0, Total=3540 [2021-05-22 02:59:28,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15418 states. [2021-05-22 02:59:28,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15418 to 11844. [2021-05-22 02:59:28,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11844 states, 11843 states have (on average 3.3374989445241914) internal successors, (39526), 11843 states have internal predecessors, (39526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:28,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11844 states to 11844 states and 39526 transitions. [2021-05-22 02:59:28,905 INFO L78 Accepts]: Start accepts. Automaton has 11844 states and 39526 transitions. Word has length 36 [2021-05-22 02:59:28,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:59:28,905 INFO L482 AbstractCegarLoop]: Abstraction has 11844 states and 39526 transitions. [2021-05-22 02:59:28,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:28,905 INFO L276 IsEmpty]: Start isEmpty. Operand 11844 states and 39526 transitions. [2021-05-22 02:59:28,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:59:28,919 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:59:28,919 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:59:29,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1388 [2021-05-22 02:59:29,119 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:59:29,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:59:29,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1420539917, now seen corresponding path program 179 times [2021-05-22 02:59:29,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:59:29,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106943580] [2021-05-22 02:59:29,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:59:29,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:59:29,327 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:29,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:59:29,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106943580] [2021-05-22 02:59:29,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106943580] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:29,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067209912] [2021-05-22 02:59:29,327 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:59:29,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-22 02:59:29,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:59:29,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:59:29,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:59:29,814 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:29,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067209912] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:29,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:59:29,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 02:59:29,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757174548] [2021-05-22 02:59:29,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:59:29,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:59:29,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:59:29,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:59:29,815 INFO L87 Difference]: Start difference. First operand 11844 states and 39526 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:31,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:59:31,446 INFO L93 Difference]: Finished difference Result 21602 states and 70452 transitions. [2021-05-22 02:59:31,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-22 02:59:31,446 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:59:31,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:59:31,481 INFO L225 Difference]: With dead ends: 21602 [2021-05-22 02:59:31,481 INFO L226 Difference]: Without dead ends: 21522 [2021-05-22 02:59:31,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1351.8ms TimeCoverageRelationStatistics Valid=632, Invalid=2908, Unknown=0, NotChecked=0, Total=3540 [2021-05-22 02:59:31,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21522 states. [2021-05-22 02:59:31,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21522 to 12142. [2021-05-22 02:59:31,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12142 states, 12141 states have (on average 3.341405156082695) internal successors, (40568), 12141 states have internal predecessors, (40568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:31,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12142 states to 12142 states and 40568 transitions. [2021-05-22 02:59:31,735 INFO L78 Accepts]: Start accepts. Automaton has 12142 states and 40568 transitions. Word has length 36 [2021-05-22 02:59:31,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:59:31,735 INFO L482 AbstractCegarLoop]: Abstraction has 12142 states and 40568 transitions. [2021-05-22 02:59:31,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:31,735 INFO L276 IsEmpty]: Start isEmpty. Operand 12142 states and 40568 transitions. [2021-05-22 02:59:31,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:59:31,748 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:59:31,748 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:59:31,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1393,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:59:31,949 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:59:31,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:59:31,949 INFO L82 PathProgramCache]: Analyzing trace with hash 467803489, now seen corresponding path program 180 times [2021-05-22 02:59:31,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:59:31,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271640729] [2021-05-22 02:59:31,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:59:31,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:59:32,264 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:32,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:59:32,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271640729] [2021-05-22 02:59:32,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271640729] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:32,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931342430] [2021-05-22 02:59:32,264 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:59:32,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:59:32,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:59:32,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:59:32,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:59:32,814 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:32,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931342430] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:32,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:59:32,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-05-22 02:59:32,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35338677] [2021-05-22 02:59:32,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:59:32,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:59:32,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:59:32,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:59:32,815 INFO L87 Difference]: Start difference. First operand 12142 states and 40568 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:35,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:59:35,827 INFO L93 Difference]: Finished difference Result 25038 states and 81053 transitions. [2021-05-22 02:59:35,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-22 02:59:35,827 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:59:35,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:59:35,872 INFO L225 Difference]: With dead ends: 25038 [2021-05-22 02:59:35,873 INFO L226 Difference]: Without dead ends: 24894 [2021-05-22 02:59:35,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2181 ImplicationChecksByTransitivity, 2725.6ms TimeCoverageRelationStatistics Valid=1203, Invalid=5603, Unknown=0, NotChecked=0, Total=6806 [2021-05-22 02:59:35,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24894 states. [2021-05-22 02:59:36,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24894 to 12144. [2021-05-22 02:59:36,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12144 states, 12143 states have (on average 3.3383842543028908) internal successors, (40538), 12143 states have internal predecessors, (40538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:36,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12144 states to 12144 states and 40538 transitions. [2021-05-22 02:59:36,182 INFO L78 Accepts]: Start accepts. Automaton has 12144 states and 40538 transitions. Word has length 36 [2021-05-22 02:59:36,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:59:36,182 INFO L482 AbstractCegarLoop]: Abstraction has 12144 states and 40538 transitions. [2021-05-22 02:59:36,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:36,182 INFO L276 IsEmpty]: Start isEmpty. Operand 12144 states and 40538 transitions. [2021-05-22 02:59:36,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:59:36,196 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:59:36,197 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:59:36,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1402,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:59:36,409 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:59:36,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:59:36,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1192840929, now seen corresponding path program 181 times [2021-05-22 02:59:36,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:59:36,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307605033] [2021-05-22 02:59:36,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:59:36,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:59:36,765 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:36,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:59:36,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307605033] [2021-05-22 02:59:36,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307605033] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:36,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881753689] [2021-05-22 02:59:36,766 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:59:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:59:36,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:59:36,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:59:37,377 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:37,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881753689] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:37,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:59:37,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 02:59:37,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309294894] [2021-05-22 02:59:37,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:59:37,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:59:37,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:59:37,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:59:37,378 INFO L87 Difference]: Start difference. First operand 12144 states and 40538 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:39,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:59:39,291 INFO L93 Difference]: Finished difference Result 20977 states and 68569 transitions. [2021-05-22 02:59:39,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-22 02:59:39,291 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:59:39,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:59:39,323 INFO L225 Difference]: With dead ends: 20977 [2021-05-22 02:59:39,324 INFO L226 Difference]: Without dead ends: 20857 [2021-05-22 02:59:39,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 1877.4ms TimeCoverageRelationStatistics Valid=606, Invalid=3054, Unknown=0, NotChecked=0, Total=3660 [2021-05-22 02:59:39,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20857 states. [2021-05-22 02:59:39,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20857 to 12189. [2021-05-22 02:59:39,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12189 states, 12188 states have (on average 3.338037413849688) internal successors, (40684), 12188 states have internal predecessors, (40684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:39,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12189 states to 12189 states and 40684 transitions. [2021-05-22 02:59:39,554 INFO L78 Accepts]: Start accepts. Automaton has 12189 states and 40684 transitions. Word has length 36 [2021-05-22 02:59:39,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:59:39,554 INFO L482 AbstractCegarLoop]: Abstraction has 12189 states and 40684 transitions. [2021-05-22 02:59:39,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:39,554 INFO L276 IsEmpty]: Start isEmpty. Operand 12189 states and 40684 transitions. [2021-05-22 02:59:39,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:59:39,567 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:59:39,567 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:59:39,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1412 [2021-05-22 02:59:39,768 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:59:39,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:59:39,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1184665001, now seen corresponding path program 182 times [2021-05-22 02:59:39,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:59:39,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672881958] [2021-05-22 02:59:39,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:59:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:59:40,014 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:40,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:59:40,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672881958] [2021-05-22 02:59:40,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672881958] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:40,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087522368] [2021-05-22 02:59:40,015 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:59:40,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:59:40,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:59:40,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:59:40,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:59:40,478 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:40,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087522368] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:40,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:59:40,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-22 02:59:40,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244659286] [2021-05-22 02:59:40,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:59:40,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:59:40,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:59:40,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:59:40,479 INFO L87 Difference]: Start difference. First operand 12189 states and 40684 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:43,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:59:43,625 INFO L93 Difference]: Finished difference Result 19086 states and 61174 transitions. [2021-05-22 02:59:43,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-22 02:59:43,626 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:59:43,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:59:43,654 INFO L225 Difference]: With dead ends: 19086 [2021-05-22 02:59:43,654 INFO L226 Difference]: Without dead ends: 18870 [2021-05-22 02:59:43,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2741 ImplicationChecksByTransitivity, 2610.1ms TimeCoverageRelationStatistics Valid=1293, Invalid=6897, Unknown=0, NotChecked=0, Total=8190 [2021-05-22 02:59:43,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18870 states. [2021-05-22 02:59:43,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18870 to 12229. [2021-05-22 02:59:43,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12229 states, 12228 states have (on average 3.3382401046777885) internal successors, (40820), 12228 states have internal predecessors, (40820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:43,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12229 states to 12229 states and 40820 transitions. [2021-05-22 02:59:43,890 INFO L78 Accepts]: Start accepts. Automaton has 12229 states and 40820 transitions. Word has length 36 [2021-05-22 02:59:43,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:59:43,890 INFO L482 AbstractCegarLoop]: Abstraction has 12229 states and 40820 transitions. [2021-05-22 02:59:43,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:43,890 INFO L276 IsEmpty]: Start isEmpty. Operand 12229 states and 40820 transitions. [2021-05-22 02:59:43,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:59:43,904 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:59:43,904 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:59:44,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1419,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:59:44,104 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:59:44,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:59:44,105 INFO L82 PathProgramCache]: Analyzing trace with hash -380080395, now seen corresponding path program 183 times [2021-05-22 02:59:44,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:59:44,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91787568] [2021-05-22 02:59:44,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:59:44,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:59:44,360 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:44,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:59:44,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91787568] [2021-05-22 02:59:44,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91787568] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:44,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749978714] [2021-05-22 02:59:44,361 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:59:44,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:59:44,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:59:44,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:59:44,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:59:44,887 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:44,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749978714] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:44,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:59:44,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-22 02:59:44,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040214074] [2021-05-22 02:59:44,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:59:44,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:59:44,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:59:44,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:59:44,888 INFO L87 Difference]: Start difference. First operand 12229 states and 40820 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:48,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:59:48,899 INFO L93 Difference]: Finished difference Result 16407 states and 52859 transitions. [2021-05-22 02:59:48,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-22 02:59:48,899 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:59:48,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:59:48,924 INFO L225 Difference]: With dead ends: 16407 [2021-05-22 02:59:48,924 INFO L226 Difference]: Without dead ends: 16211 [2021-05-22 02:59:48,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3092 ImplicationChecksByTransitivity, 3252.3ms TimeCoverageRelationStatistics Valid=1118, Invalid=8584, Unknown=0, NotChecked=0, Total=9702 [2021-05-22 02:59:48,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16211 states. [2021-05-22 02:59:49,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16211 to 12269. [2021-05-22 02:59:49,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12269 states, 12268 states have (on average 3.3387675252689926) internal successors, (40960), 12268 states have internal predecessors, (40960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:49,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12269 states to 12269 states and 40960 transitions. [2021-05-22 02:59:49,134 INFO L78 Accepts]: Start accepts. Automaton has 12269 states and 40960 transitions. Word has length 36 [2021-05-22 02:59:49,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:59:49,134 INFO L482 AbstractCegarLoop]: Abstraction has 12269 states and 40960 transitions. [2021-05-22 02:59:49,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:49,134 INFO L276 IsEmpty]: Start isEmpty. Operand 12269 states and 40960 transitions. [2021-05-22 02:59:49,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:59:49,147 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:59:49,148 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:59:49,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1423 [2021-05-22 02:59:49,348 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:59:49,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:59:49,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1956145309, now seen corresponding path program 184 times [2021-05-22 02:59:49,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:59:49,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254841383] [2021-05-22 02:59:49,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:59:49,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:59:49,647 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:49,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:59:49,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254841383] [2021-05-22 02:59:49,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254841383] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:49,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513078855] [2021-05-22 02:59:49,647 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:59:49,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:59:49,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:59:49,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:59:49,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:59:50,168 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:50,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513078855] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:50,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:59:50,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-22 02:59:50,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569852451] [2021-05-22 02:59:50,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:59:50,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:59:50,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:59:50,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1151, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:59:50,169 INFO L87 Difference]: Start difference. First operand 12269 states and 40960 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:52,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:59:52,799 INFO L93 Difference]: Finished difference Result 15302 states and 49660 transitions. [2021-05-22 02:59:52,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-22 02:59:52,799 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:59:52,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:59:52,822 INFO L225 Difference]: With dead ends: 15302 [2021-05-22 02:59:52,822 INFO L226 Difference]: Without dead ends: 15141 [2021-05-22 02:59:52,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2241 ImplicationChecksByTransitivity, 2353.8ms TimeCoverageRelationStatistics Valid=983, Invalid=6327, Unknown=0, NotChecked=0, Total=7310 [2021-05-22 02:59:52,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15141 states. [2021-05-22 02:59:52,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15141 to 12290. [2021-05-22 02:59:53,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12290 states, 12289 states have (on average 3.3385141183171942) internal successors, (41027), 12289 states have internal predecessors, (41027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:53,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12290 states to 12290 states and 41027 transitions. [2021-05-22 02:59:53,033 INFO L78 Accepts]: Start accepts. Automaton has 12290 states and 41027 transitions. Word has length 36 [2021-05-22 02:59:53,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:59:53,033 INFO L482 AbstractCegarLoop]: Abstraction has 12290 states and 41027 transitions. [2021-05-22 02:59:53,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:53,033 INFO L276 IsEmpty]: Start isEmpty. Operand 12290 states and 41027 transitions. [2021-05-22 02:59:53,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:59:53,047 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:59:53,047 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:59:53,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1427,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:59:53,247 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:59:53,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:59:53,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1621253987, now seen corresponding path program 185 times [2021-05-22 02:59:53,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:59:53,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236732993] [2021-05-22 02:59:53,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:59:53,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:59:53,611 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:53,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:59:53,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236732993] [2021-05-22 02:59:53,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236732993] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:53,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860303483] [2021-05-22 02:59:53,611 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:59:53,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 02:59:53,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:59:53,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:59:53,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:59:54,155 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:54,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860303483] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:54,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:59:54,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-22 02:59:54,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125650085] [2021-05-22 02:59:54,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:59:54,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:59:54,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:59:54,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1130, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:59:54,156 INFO L87 Difference]: Start difference. First operand 12290 states and 41027 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:57,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:59:57,611 INFO L93 Difference]: Finished difference Result 19633 states and 62945 transitions. [2021-05-22 02:59:57,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-22 02:59:57,611 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 02:59:57,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:59:57,639 INFO L225 Difference]: With dead ends: 19633 [2021-05-22 02:59:57,639 INFO L226 Difference]: Without dead ends: 19422 [2021-05-22 02:59:57,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3025 ImplicationChecksByTransitivity, 3064.2ms TimeCoverageRelationStatistics Valid=1359, Invalid=7761, Unknown=0, NotChecked=0, Total=9120 [2021-05-22 02:59:57,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19422 states. [2021-05-22 02:59:57,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19422 to 12293. [2021-05-22 02:59:57,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12293 states, 12292 states have (on average 3.338512853888708) internal successors, (41037), 12292 states have internal predecessors, (41037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:57,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12293 states to 12293 states and 41037 transitions. [2021-05-22 02:59:57,875 INFO L78 Accepts]: Start accepts. Automaton has 12293 states and 41037 transitions. Word has length 36 [2021-05-22 02:59:57,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:59:57,875 INFO L482 AbstractCegarLoop]: Abstraction has 12293 states and 41037 transitions. [2021-05-22 02:59:57,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:57,876 INFO L276 IsEmpty]: Start isEmpty. Operand 12293 states and 41037 transitions. [2021-05-22 02:59:57,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 02:59:57,889 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:59:57,889 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:59:58,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1431 [2021-05-22 02:59:58,089 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:59:58,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:59:58,090 INFO L82 PathProgramCache]: Analyzing trace with hash 854503393, now seen corresponding path program 186 times [2021-05-22 02:59:58,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:59:58,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511814378] [2021-05-22 02:59:58,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:59:58,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:59:58,393 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:58,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:59:58,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511814378] [2021-05-22 02:59:58,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511814378] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:58,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914125907] [2021-05-22 02:59:58,393 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:59:58,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:59:58,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:59:58,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:59:58,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:59:58,864 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:58,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914125907] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:58,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:59:58,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-05-22 02:59:58,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657963370] [2021-05-22 02:59:58,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-22 02:59:58,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:59:58,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-22 02:59:58,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:59:58,865 INFO L87 Difference]: Start difference. First operand 12293 states and 41037 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:00,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:00:00,877 INFO L93 Difference]: Finished difference Result 17914 states and 58827 transitions. [2021-05-22 03:00:00,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-22 03:00:00,877 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 03:00:00,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:00:00,903 INFO L225 Difference]: With dead ends: 17914 [2021-05-22 03:00:00,903 INFO L226 Difference]: Without dead ends: 17785 [2021-05-22 03:00:00,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 1809.8ms TimeCoverageRelationStatistics Valid=535, Invalid=3125, Unknown=0, NotChecked=0, Total=3660 [2021-05-22 03:00:00,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17785 states. [2021-05-22 03:00:01,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17785 to 12293. [2021-05-22 03:00:01,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12293 states, 12292 states have (on average 3.338106085258705) internal successors, (41032), 12292 states have internal predecessors, (41032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:01,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12293 states to 12293 states and 41032 transitions. [2021-05-22 03:00:01,145 INFO L78 Accepts]: Start accepts. Automaton has 12293 states and 41032 transitions. Word has length 36 [2021-05-22 03:00:01,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:00:01,145 INFO L482 AbstractCegarLoop]: Abstraction has 12293 states and 41032 transitions. [2021-05-22 03:00:01,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:01,145 INFO L276 IsEmpty]: Start isEmpty. Operand 12293 states and 41032 transitions. [2021-05-22 03:00:01,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 03:00:01,158 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:00:01,158 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:00:01,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1435,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:01,359 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:00:01,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:00:01,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1323374493, now seen corresponding path program 187 times [2021-05-22 03:00:01,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:00:01,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440932082] [2021-05-22 03:00:01,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:00:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:01,597 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:01,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:00:01,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440932082] [2021-05-22 03:00:01,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440932082] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:01,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780838172] [2021-05-22 03:00:01,597 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:01,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:01,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 03:00:01,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:00:02,134 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:02,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780838172] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:02,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:00:02,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 03:00:02,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705027101] [2021-05-22 03:00:02,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 03:00:02,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:00:02,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 03:00:02,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 03:00:02,135 INFO L87 Difference]: Start difference. First operand 12293 states and 41032 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:04,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:00:04,233 INFO L93 Difference]: Finished difference Result 23068 states and 75736 transitions. [2021-05-22 03:00:04,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-22 03:00:04,234 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 03:00:04,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:00:04,272 INFO L225 Difference]: With dead ends: 23068 [2021-05-22 03:00:04,272 INFO L226 Difference]: Without dead ends: 22988 [2021-05-22 03:00:04,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1602.4ms TimeCoverageRelationStatistics Valid=751, Invalid=3281, Unknown=0, NotChecked=0, Total=4032 [2021-05-22 03:00:04,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22988 states. [2021-05-22 03:00:04,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22988 to 12968. [2021-05-22 03:00:04,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12968 states, 12967 states have (on average 3.352818693606848) internal successors, (43476), 12967 states have internal predecessors, (43476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:04,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12968 states to 12968 states and 43476 transitions. [2021-05-22 03:00:04,591 INFO L78 Accepts]: Start accepts. Automaton has 12968 states and 43476 transitions. Word has length 36 [2021-05-22 03:00:04,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:00:04,591 INFO L482 AbstractCegarLoop]: Abstraction has 12968 states and 43476 transitions. [2021-05-22 03:00:04,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:04,591 INFO L276 IsEmpty]: Start isEmpty. Operand 12968 states and 43476 transitions. [2021-05-22 03:00:04,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 03:00:04,606 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:00:04,606 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:00:04,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1440 [2021-05-22 03:00:04,807 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:00:04,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:00:04,807 INFO L82 PathProgramCache]: Analyzing trace with hash -692650399, now seen corresponding path program 188 times [2021-05-22 03:00:04,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:00:04,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574864806] [2021-05-22 03:00:04,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:00:04,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:05,114 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:05,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:00:05,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574864806] [2021-05-22 03:00:05,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574864806] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:05,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979885310] [2021-05-22 03:00:05,115 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:05,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 03:00:05,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:00:05,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 03:00:05,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:00:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:05,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979885310] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:05,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:00:05,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-22 03:00:05,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168662274] [2021-05-22 03:00:05,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 03:00:05,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:00:05,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 03:00:05,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1003, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 03:00:05,662 INFO L87 Difference]: Start difference. First operand 12968 states and 43476 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:09,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:00:09,127 INFO L93 Difference]: Finished difference Result 22786 states and 72843 transitions. [2021-05-22 03:00:09,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-22 03:00:09,127 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 03:00:09,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:00:09,162 INFO L225 Difference]: With dead ends: 22786 [2021-05-22 03:00:09,162 INFO L226 Difference]: Without dead ends: 22614 [2021-05-22 03:00:09,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2129 ImplicationChecksByTransitivity, 2658.9ms TimeCoverageRelationStatistics Valid=1189, Invalid=5783, Unknown=0, NotChecked=0, Total=6972 [2021-05-22 03:00:09,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22614 states. [2021-05-22 03:00:09,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22614 to 12990. [2021-05-22 03:00:09,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12990 states, 12989 states have (on average 3.3539148510277927) internal successors, (43564), 12989 states have internal predecessors, (43564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:09,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12990 states to 12990 states and 43564 transitions. [2021-05-22 03:00:09,475 INFO L78 Accepts]: Start accepts. Automaton has 12990 states and 43564 transitions. Word has length 36 [2021-05-22 03:00:09,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:00:09,475 INFO L482 AbstractCegarLoop]: Abstraction has 12990 states and 43564 transitions. [2021-05-22 03:00:09,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:09,475 INFO L276 IsEmpty]: Start isEmpty. Operand 12990 states and 43564 transitions. [2021-05-22 03:00:09,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 03:00:09,490 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:00:09,490 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:00:09,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1454 [2021-05-22 03:00:09,701 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:00:09,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:00:09,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1695532813, now seen corresponding path program 189 times [2021-05-22 03:00:09,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:00:09,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419051972] [2021-05-22 03:00:09,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:00:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:09,972 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:09,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:00:09,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419051972] [2021-05-22 03:00:09,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419051972] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:09,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183248359] [2021-05-22 03:00:09,972 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:09,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 03:00:09,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:00:09,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 03:00:09,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:00:10,492 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:10,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183248359] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:10,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:00:10,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-05-22 03:00:10,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010982830] [2021-05-22 03:00:10,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 03:00:10,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:00:10,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 03:00:10,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 03:00:10,493 INFO L87 Difference]: Start difference. First operand 12990 states and 43564 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:13,832 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-05-22 03:00:14,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:00:14,291 INFO L93 Difference]: Finished difference Result 23278 states and 74375 transitions. [2021-05-22 03:00:14,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-22 03:00:14,291 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 03:00:14,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:00:14,333 INFO L225 Difference]: With dead ends: 23278 [2021-05-22 03:00:14,333 INFO L226 Difference]: Without dead ends: 23106 [2021-05-22 03:00:14,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2624 ImplicationChecksByTransitivity, 2925.0ms TimeCoverageRelationStatistics Valid=1432, Invalid=6940, Unknown=0, NotChecked=0, Total=8372 [2021-05-22 03:00:14,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23106 states. [2021-05-22 03:00:14,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23106 to 12962. [2021-05-22 03:00:14,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12962 states, 12961 states have (on average 3.352519095748785) internal successors, (43452), 12961 states have internal predecessors, (43452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:14,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12962 states to 12962 states and 43452 transitions. [2021-05-22 03:00:14,632 INFO L78 Accepts]: Start accepts. Automaton has 12962 states and 43452 transitions. Word has length 36 [2021-05-22 03:00:14,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:00:14,632 INFO L482 AbstractCegarLoop]: Abstraction has 12962 states and 43452 transitions. [2021-05-22 03:00:14,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:14,632 INFO L276 IsEmpty]: Start isEmpty. Operand 12962 states and 43452 transitions. [2021-05-22 03:00:14,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 03:00:14,647 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:00:14,648 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:00:14,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1458,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:14,855 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:00:14,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:00:14,855 INFO L82 PathProgramCache]: Analyzing trace with hash -763276463, now seen corresponding path program 190 times [2021-05-22 03:00:14,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:00:14,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344057981] [2021-05-22 03:00:14,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:00:14,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:15,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:00:15,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344057981] [2021-05-22 03:00:15,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344057981] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:15,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094159154] [2021-05-22 03:00:15,114 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:15,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 03:00:15,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:00:15,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 03:00:15,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:00:15,706 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:15,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094159154] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:15,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:00:15,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-05-22 03:00:15,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039501547] [2021-05-22 03:00:15,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-22 03:00:15,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:00:15,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-22 03:00:15,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 03:00:15,707 INFO L87 Difference]: Start difference. First operand 12962 states and 43452 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:19,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:00:19,475 INFO L93 Difference]: Finished difference Result 23019 states and 73482 transitions. [2021-05-22 03:00:19,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-22 03:00:19,476 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 03:00:19,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:00:19,512 INFO L225 Difference]: With dead ends: 23019 [2021-05-22 03:00:19,512 INFO L226 Difference]: Without dead ends: 22847 [2021-05-22 03:00:19,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2960 ImplicationChecksByTransitivity, 3092.2ms TimeCoverageRelationStatistics Valid=1505, Invalid=7807, Unknown=0, NotChecked=0, Total=9312 [2021-05-22 03:00:19,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22847 states. [2021-05-22 03:00:19,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22847 to 12913. [2021-05-22 03:00:19,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12913 states, 12912 states have (on average 3.349907063197026) internal successors, (43254), 12912 states have internal predecessors, (43254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:19,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12913 states to 12913 states and 43254 transitions. [2021-05-22 03:00:19,808 INFO L78 Accepts]: Start accepts. Automaton has 12913 states and 43254 transitions. Word has length 36 [2021-05-22 03:00:19,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:00:19,808 INFO L482 AbstractCegarLoop]: Abstraction has 12913 states and 43254 transitions. [2021-05-22 03:00:19,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:19,808 INFO L276 IsEmpty]: Start isEmpty. Operand 12913 states and 43254 transitions. [2021-05-22 03:00:19,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 03:00:19,823 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:00:19,823 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:00:20,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1462 [2021-05-22 03:00:20,023 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:00:20,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:00:20,024 INFO L82 PathProgramCache]: Analyzing trace with hash -2119463059, now seen corresponding path program 191 times [2021-05-22 03:00:20,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:00:20,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568167242] [2021-05-22 03:00:20,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:00:20,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:20,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:00:20,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568167242] [2021-05-22 03:00:20,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568167242] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:20,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933508285] [2021-05-22 03:00:20,316 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:20,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 03:00:20,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:00:20,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 03:00:20,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:00:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:20,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933508285] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:20,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:00:20,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 03:00:20,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076374001] [2021-05-22 03:00:20,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 03:00:20,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:00:20,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 03:00:20,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 03:00:20,890 INFO L87 Difference]: Start difference. First operand 12913 states and 43254 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:22,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:00:22,138 INFO L93 Difference]: Finished difference Result 15149 states and 49953 transitions. [2021-05-22 03:00:22,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-22 03:00:22,138 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 03:00:22,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:00:22,159 INFO L225 Difference]: With dead ends: 15149 [2021-05-22 03:00:22,160 INFO L226 Difference]: Without dead ends: 15081 [2021-05-22 03:00:22,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1279.1ms TimeCoverageRelationStatistics Valid=462, Invalid=2400, Unknown=0, NotChecked=0, Total=2862 [2021-05-22 03:00:22,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15081 states. [2021-05-22 03:00:22,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15081 to 13005. [2021-05-22 03:00:22,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13005 states, 13004 states have (on average 3.3488157490003077) internal successors, (43548), 13004 states have internal predecessors, (43548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:22,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13005 states to 13005 states and 43548 transitions. [2021-05-22 03:00:22,370 INFO L78 Accepts]: Start accepts. Automaton has 13005 states and 43548 transitions. Word has length 36 [2021-05-22 03:00:22,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:00:22,370 INFO L482 AbstractCegarLoop]: Abstraction has 13005 states and 43548 transitions. [2021-05-22 03:00:22,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:22,370 INFO L276 IsEmpty]: Start isEmpty. Operand 13005 states and 43548 transitions. [2021-05-22 03:00:22,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 03:00:22,385 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:00:22,385 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:00:22,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1466 [2021-05-22 03:00:22,600 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:00:22,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:00:22,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1197760919, now seen corresponding path program 192 times [2021-05-22 03:00:22,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:00:22,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626322980] [2021-05-22 03:00:22,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:00:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:22,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:00:22,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626322980] [2021-05-22 03:00:22,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626322980] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:22,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036887900] [2021-05-22 03:00:22,904 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:22,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 03:00:22,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:00:22,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 03:00:22,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:00:23,456 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:23,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036887900] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:23,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:00:23,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-05-22 03:00:23,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100856036] [2021-05-22 03:00:23,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-22 03:00:23,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:00:23,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-22 03:00:23,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 03:00:23,457 INFO L87 Difference]: Start difference. First operand 13005 states and 43548 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:25,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:00:25,011 INFO L93 Difference]: Finished difference Result 16075 states and 53117 transitions. [2021-05-22 03:00:25,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-22 03:00:25,012 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 03:00:25,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:00:25,039 INFO L225 Difference]: With dead ends: 16075 [2021-05-22 03:00:25,039 INFO L226 Difference]: Without dead ends: 15955 [2021-05-22 03:00:25,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1420.3ms TimeCoverageRelationStatistics Valid=513, Invalid=2457, Unknown=0, NotChecked=0, Total=2970 [2021-05-22 03:00:25,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15955 states. [2021-05-22 03:00:25,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15955 to 13001. [2021-05-22 03:00:25,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13001 states, 13000 states have (on average 3.3484615384615384) internal successors, (43530), 13000 states have internal predecessors, (43530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:25,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13001 states to 13001 states and 43530 transitions. [2021-05-22 03:00:25,274 INFO L78 Accepts]: Start accepts. Automaton has 13001 states and 43530 transitions. Word has length 36 [2021-05-22 03:00:25,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:00:25,274 INFO L482 AbstractCegarLoop]: Abstraction has 13001 states and 43530 transitions. [2021-05-22 03:00:25,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:25,275 INFO L276 IsEmpty]: Start isEmpty. Operand 13001 states and 43530 transitions. [2021-05-22 03:00:25,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 03:00:25,289 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:00:25,290 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:00:25,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1470,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:25,490 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:00:25,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:00:25,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1267870955, now seen corresponding path program 193 times [2021-05-22 03:00:25,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:00:25,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705187231] [2021-05-22 03:00:25,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:00:25,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:25,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:00:25,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705187231] [2021-05-22 03:00:25,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705187231] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:25,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953798713] [2021-05-22 03:00:25,904 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-22 03:00:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:25,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 03:00:25,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:00:26,519 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:26,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953798713] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:26,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:00:26,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 03:00:26,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791940116] [2021-05-22 03:00:26,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 03:00:26,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:00:26,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 03:00:26,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1001, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 03:00:26,521 INFO L87 Difference]: Start difference. First operand 13001 states and 43530 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:28,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:00:28,014 INFO L93 Difference]: Finished difference Result 15975 states and 53082 transitions. [2021-05-22 03:00:28,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-22 03:00:28,014 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 03:00:28,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:00:28,040 INFO L225 Difference]: With dead ends: 15975 [2021-05-22 03:00:28,041 INFO L226 Difference]: Without dead ends: 15855 [2021-05-22 03:00:28,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 1546.5ms TimeCoverageRelationStatistics Valid=515, Invalid=2455, Unknown=0, NotChecked=0, Total=2970 [2021-05-22 03:00:28,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15855 states. [2021-05-22 03:00:28,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15855 to 12997. [2021-05-22 03:00:28,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12997 states, 12996 states have (on average 3.3485687903970454) internal successors, (43518), 12996 states have internal predecessors, (43518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:28,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12997 states to 12997 states and 43518 transitions. [2021-05-22 03:00:28,278 INFO L78 Accepts]: Start accepts. Automaton has 12997 states and 43518 transitions. Word has length 36 [2021-05-22 03:00:28,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:00:28,278 INFO L482 AbstractCegarLoop]: Abstraction has 12997 states and 43518 transitions. [2021-05-22 03:00:28,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:28,278 INFO L276 IsEmpty]: Start isEmpty. Operand 12997 states and 43518 transitions. [2021-05-22 03:00:28,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 03:00:28,293 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:00:28,293 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:00:28,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1480,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:28,509 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:00:28,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:00:28,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1454175017, now seen corresponding path program 194 times [2021-05-22 03:00:28,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:00:28,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504836651] [2021-05-22 03:00:28,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:00:28,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:28,754 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:28,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:00:28,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504836651] [2021-05-22 03:00:28,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504836651] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:28,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482742488] [2021-05-22 03:00:28,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:28,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 03:00:28,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:00:28,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 03:00:28,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:00:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:29,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482742488] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:29,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:00:29,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-22 03:00:29,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108713338] [2021-05-22 03:00:29,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 03:00:29,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:00:29,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 03:00:29,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 03:00:29,249 INFO L87 Difference]: Start difference. First operand 12997 states and 43518 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:31,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:00:31,645 INFO L93 Difference]: Finished difference Result 14950 states and 48998 transitions. [2021-05-22 03:00:31,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-22 03:00:31,645 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 03:00:31,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:00:31,667 INFO L225 Difference]: With dead ends: 14950 [2021-05-22 03:00:31,667 INFO L226 Difference]: Without dead ends: 14660 [2021-05-22 03:00:31,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 1852.3ms TimeCoverageRelationStatistics Valid=731, Invalid=4525, Unknown=0, NotChecked=0, Total=5256 [2021-05-22 03:00:31,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14660 states. [2021-05-22 03:00:31,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14660 to 13079. [2021-05-22 03:00:31,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13079 states, 13078 states have (on average 3.3476066676861906) internal successors, (43780), 13078 states have internal predecessors, (43780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:31,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13079 states to 13079 states and 43780 transitions. [2021-05-22 03:00:31,881 INFO L78 Accepts]: Start accepts. Automaton has 13079 states and 43780 transitions. Word has length 36 [2021-05-22 03:00:31,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:00:31,882 INFO L482 AbstractCegarLoop]: Abstraction has 13079 states and 43780 transitions. [2021-05-22 03:00:31,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:31,882 INFO L276 IsEmpty]: Start isEmpty. Operand 13079 states and 43780 transitions. [2021-05-22 03:00:31,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 03:00:31,897 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:00:31,897 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:00:32,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1490,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:32,098 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:00:32,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:00:32,098 INFO L82 PathProgramCache]: Analyzing trace with hash -504566575, now seen corresponding path program 195 times [2021-05-22 03:00:32,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:00:32,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412381253] [2021-05-22 03:00:32,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:00:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:32,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:00:32,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412381253] [2021-05-22 03:00:32,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412381253] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:32,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450749943] [2021-05-22 03:00:32,304 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:32,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 03:00:32,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:00:32,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 03:00:32,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:00:32,826 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:32,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450749943] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:32,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:00:32,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-22 03:00:32,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100894228] [2021-05-22 03:00:32,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 03:00:32,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:00:32,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 03:00:32,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 03:00:32,827 INFO L87 Difference]: Start difference. First operand 13079 states and 43780 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:35,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:00:35,286 INFO L93 Difference]: Finished difference Result 15902 states and 51920 transitions. [2021-05-22 03:00:35,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-22 03:00:35,286 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 03:00:35,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:00:35,312 INFO L225 Difference]: With dead ends: 15902 [2021-05-22 03:00:35,312 INFO L226 Difference]: Without dead ends: 15644 [2021-05-22 03:00:35,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 1839.5ms TimeCoverageRelationStatistics Valid=799, Invalid=4313, Unknown=0, NotChecked=0, Total=5112 [2021-05-22 03:00:35,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15644 states. [2021-05-22 03:00:35,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15644 to 13110. [2021-05-22 03:00:35,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13110 states, 13109 states have (on average 3.3476237699290565) internal successors, (43884), 13109 states have internal predecessors, (43884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:35,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13110 states to 13110 states and 43884 transitions. [2021-05-22 03:00:35,552 INFO L78 Accepts]: Start accepts. Automaton has 13110 states and 43884 transitions. Word has length 36 [2021-05-22 03:00:35,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:00:35,552 INFO L482 AbstractCegarLoop]: Abstraction has 13110 states and 43884 transitions. [2021-05-22 03:00:35,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:35,553 INFO L276 IsEmpty]: Start isEmpty. Operand 13110 states and 43884 transitions. [2021-05-22 03:00:35,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 03:00:35,570 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:00:35,570 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:00:35,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1494,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:35,771 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:00:35,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:00:35,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1536098455, now seen corresponding path program 196 times [2021-05-22 03:00:35,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:00:35,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133520218] [2021-05-22 03:00:35,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:00:35,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:36,065 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:36,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:00:36,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133520218] [2021-05-22 03:00:36,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133520218] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:36,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914353738] [2021-05-22 03:00:36,065 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:36,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 03:00:36,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:00:36,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 03:00:36,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:00:36,572 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:36,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914353738] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:36,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:00:36,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 03:00:36,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043392555] [2021-05-22 03:00:36,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 03:00:36,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:00:36,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 03:00:36,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 03:00:36,573 INFO L87 Difference]: Start difference. First operand 13110 states and 43884 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:38,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:00:38,487 INFO L93 Difference]: Finished difference Result 17253 states and 56818 transitions. [2021-05-22 03:00:38,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-22 03:00:38,487 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 03:00:38,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:00:38,515 INFO L225 Difference]: With dead ends: 17253 [2021-05-22 03:00:38,515 INFO L226 Difference]: Without dead ends: 17060 [2021-05-22 03:00:38,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1647.3ms TimeCoverageRelationStatistics Valid=640, Invalid=3266, Unknown=0, NotChecked=0, Total=3906 [2021-05-22 03:00:38,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17060 states. [2021-05-22 03:00:38,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17060 to 13073. [2021-05-22 03:00:38,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13073 states, 13072 states have (on average 3.3471542227662177) internal successors, (43754), 13072 states have internal predecessors, (43754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:38,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13073 states to 13073 states and 43754 transitions. [2021-05-22 03:00:38,787 INFO L78 Accepts]: Start accepts. Automaton has 13073 states and 43754 transitions. Word has length 36 [2021-05-22 03:00:38,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:00:38,787 INFO L482 AbstractCegarLoop]: Abstraction has 13073 states and 43754 transitions. [2021-05-22 03:00:38,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:38,787 INFO L276 IsEmpty]: Start isEmpty. Operand 13073 states and 43754 transitions. [2021-05-22 03:00:38,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 03:00:38,803 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:00:38,803 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:00:39,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1498 [2021-05-22 03:00:39,003 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:00:39,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:00:39,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1304074627, now seen corresponding path program 197 times [2021-05-22 03:00:39,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:00:39,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318156576] [2021-05-22 03:00:39,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:00:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:39,265 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:39,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:00:39,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318156576] [2021-05-22 03:00:39,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318156576] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:39,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969459671] [2021-05-22 03:00:39,266 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:39,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 03:00:39,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:00:39,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 03:00:39,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:00:39,837 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:39,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969459671] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:39,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:00:39,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 03:00:39,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940860894] [2021-05-22 03:00:39,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 03:00:39,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:00:39,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 03:00:39,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1011, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 03:00:39,838 INFO L87 Difference]: Start difference. First operand 13073 states and 43754 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:41,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:00:41,280 INFO L93 Difference]: Finished difference Result 16691 states and 54940 transitions. [2021-05-22 03:00:41,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-22 03:00:41,280 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 03:00:41,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:00:41,312 INFO L225 Difference]: With dead ends: 16691 [2021-05-22 03:00:41,312 INFO L226 Difference]: Without dead ends: 16623 [2021-05-22 03:00:41,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1393.5ms TimeCoverageRelationStatistics Valid=554, Invalid=2526, Unknown=0, NotChecked=0, Total=3080 [2021-05-22 03:00:41,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16623 states. [2021-05-22 03:00:41,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16623 to 13129. [2021-05-22 03:00:41,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13129 states, 13128 states have (on average 3.347044485070079) internal successors, (43940), 13128 states have internal predecessors, (43940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:41,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13129 states to 13129 states and 43940 transitions. [2021-05-22 03:00:41,632 INFO L78 Accepts]: Start accepts. Automaton has 13129 states and 43940 transitions. Word has length 36 [2021-05-22 03:00:41,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:00:41,632 INFO L482 AbstractCegarLoop]: Abstraction has 13129 states and 43940 transitions. [2021-05-22 03:00:41,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:41,632 INFO L276 IsEmpty]: Start isEmpty. Operand 13129 states and 43940 transitions. [2021-05-22 03:00:41,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 03:00:41,649 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:00:41,649 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:00:41,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1503 [2021-05-22 03:00:41,864 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:00:41,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:00:41,864 INFO L82 PathProgramCache]: Analyzing trace with hash -382372487, now seen corresponding path program 198 times [2021-05-22 03:00:41,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:00:41,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693583853] [2021-05-22 03:00:41,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:00:41,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:42,124 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:42,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:00:42,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693583853] [2021-05-22 03:00:42,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693583853] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:42,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605925058] [2021-05-22 03:00:42,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:42,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 03:00:42,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:00:42,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 03:00:42,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:00:42,667 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:42,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605925058] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:42,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:00:42,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-05-22 03:00:42,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359505685] [2021-05-22 03:00:42,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-22 03:00:42,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:00:42,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-22 03:00:42,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 03:00:42,668 INFO L87 Difference]: Start difference. First operand 13129 states and 43940 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:43,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:00:43,926 INFO L93 Difference]: Finished difference Result 17470 states and 57221 transitions. [2021-05-22 03:00:43,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-22 03:00:43,926 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 03:00:43,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:00:43,954 INFO L225 Difference]: With dead ends: 17470 [2021-05-22 03:00:43,954 INFO L226 Difference]: Without dead ends: 17350 [2021-05-22 03:00:43,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1240.1ms TimeCoverageRelationStatistics Valid=545, Invalid=2107, Unknown=0, NotChecked=0, Total=2652 [2021-05-22 03:00:43,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17350 states. [2021-05-22 03:00:44,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17350 to 13125. [2021-05-22 03:00:44,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13125 states, 13124 states have (on average 3.3466930813776288) internal successors, (43922), 13124 states have internal predecessors, (43922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:44,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13125 states to 13125 states and 43922 transitions. [2021-05-22 03:00:44,202 INFO L78 Accepts]: Start accepts. Automaton has 13125 states and 43922 transitions. Word has length 36 [2021-05-22 03:00:44,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:00:44,202 INFO L482 AbstractCegarLoop]: Abstraction has 13125 states and 43922 transitions. [2021-05-22 03:00:44,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:44,202 INFO L276 IsEmpty]: Start isEmpty. Operand 13125 states and 43922 transitions. [2021-05-22 03:00:44,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 03:00:44,219 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:00:44,219 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:00:44,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1507,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:44,420 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:00:44,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:00:44,420 INFO L82 PathProgramCache]: Analyzing trace with hash -452482523, now seen corresponding path program 199 times [2021-05-22 03:00:44,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:00:44,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398492850] [2021-05-22 03:00:44,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:00:44,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:44,692 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:44,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:00:44,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398492850] [2021-05-22 03:00:44,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398492850] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:44,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233547491] [2021-05-22 03:00:44,692 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:44,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 03:00:44,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:00:45,342 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:45,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233547491] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:45,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:00:45,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 03:00:45,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641038551] [2021-05-22 03:00:45,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 03:00:45,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:00:45,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 03:00:45,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 03:00:45,343 INFO L87 Difference]: Start difference. First operand 13125 states and 43922 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:46,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:00:46,822 INFO L93 Difference]: Finished difference Result 18069 states and 59263 transitions. [2021-05-22 03:00:46,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-22 03:00:46,822 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 03:00:46,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:00:46,851 INFO L225 Difference]: With dead ends: 18069 [2021-05-22 03:00:46,851 INFO L226 Difference]: Without dead ends: 17949 [2021-05-22 03:00:46,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 1520.5ms TimeCoverageRelationStatistics Valid=636, Invalid=2444, Unknown=0, NotChecked=0, Total=3080 [2021-05-22 03:00:46,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17949 states. [2021-05-22 03:00:47,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17949 to 13125. [2021-05-22 03:00:47,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13125 states, 13124 states have (on average 3.3466930813776288) internal successors, (43922), 13124 states have internal predecessors, (43922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:47,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13125 states to 13125 states and 43922 transitions. [2021-05-22 03:00:47,108 INFO L78 Accepts]: Start accepts. Automaton has 13125 states and 43922 transitions. Word has length 36 [2021-05-22 03:00:47,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:00:47,108 INFO L482 AbstractCegarLoop]: Abstraction has 13125 states and 43922 transitions. [2021-05-22 03:00:47,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:47,109 INFO L276 IsEmpty]: Start isEmpty. Operand 13125 states and 43922 transitions. [2021-05-22 03:00:47,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 03:00:47,125 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:00:47,125 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:00:47,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1514,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:47,326 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:00:47,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:00:47,326 INFO L82 PathProgramCache]: Analyzing trace with hash -2025403847, now seen corresponding path program 200 times [2021-05-22 03:00:47,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:00:47,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538417586] [2021-05-22 03:00:47,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:00:47,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:47,541 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:47,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:00:47,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538417586] [2021-05-22 03:00:47,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538417586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:47,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216014772] [2021-05-22 03:00:47,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:47,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 03:00:47,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:00:47,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 03:00:47,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:00:48,055 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:48,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216014772] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:48,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:00:48,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-22 03:00:48,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145036242] [2021-05-22 03:00:48,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 03:00:48,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:00:48,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 03:00:48,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 03:00:48,056 INFO L87 Difference]: Start difference. First operand 13125 states and 43922 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:50,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:00:50,917 INFO L93 Difference]: Finished difference Result 15356 states and 50185 transitions. [2021-05-22 03:00:50,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-22 03:00:50,918 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 03:00:50,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:00:50,941 INFO L225 Difference]: With dead ends: 15356 [2021-05-22 03:00:50,941 INFO L226 Difference]: Without dead ends: 15090 [2021-05-22 03:00:50,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 1983.0ms TimeCoverageRelationStatistics Valid=804, Invalid=5202, Unknown=0, NotChecked=0, Total=6006 [2021-05-22 03:00:50,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15090 states. [2021-05-22 03:00:51,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15090 to 13187. [2021-05-22 03:00:51,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13187 states, 13186 states have (on average 3.3462763537084785) internal successors, (44124), 13186 states have internal predecessors, (44124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:51,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13187 states to 13187 states and 44124 transitions. [2021-05-22 03:00:51,160 INFO L78 Accepts]: Start accepts. Automaton has 13187 states and 44124 transitions. Word has length 36 [2021-05-22 03:00:51,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:00:51,160 INFO L482 AbstractCegarLoop]: Abstraction has 13187 states and 44124 transitions. [2021-05-22 03:00:51,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:51,160 INFO L276 IsEmpty]: Start isEmpty. Operand 13187 states and 44124 transitions. [2021-05-22 03:00:51,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 03:00:51,175 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:00:51,175 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:00:51,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1521 [2021-05-22 03:00:51,376 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:00:51,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:00:51,376 INFO L82 PathProgramCache]: Analyzing trace with hash 310821857, now seen corresponding path program 201 times [2021-05-22 03:00:51,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:00:51,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311750094] [2021-05-22 03:00:51,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:00:51,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:51,579 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:51,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:00:51,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311750094] [2021-05-22 03:00:51,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311750094] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:51,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586554416] [2021-05-22 03:00:51,579 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:51,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 03:00:51,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:00:51,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 03:00:51,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:00:52,082 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:52,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586554416] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:52,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:00:52,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-22 03:00:52,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471082965] [2021-05-22 03:00:52,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 03:00:52,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:00:52,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 03:00:52,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1073, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 03:00:52,083 INFO L87 Difference]: Start difference. First operand 13187 states and 44124 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:54,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:00:54,514 INFO L93 Difference]: Finished difference Result 16136 states and 52589 transitions. [2021-05-22 03:00:54,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-22 03:00:54,515 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 03:00:54,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:00:54,539 INFO L225 Difference]: With dead ends: 16136 [2021-05-22 03:00:54,539 INFO L226 Difference]: Without dead ends: 15902 [2021-05-22 03:00:54,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1581 ImplicationChecksByTransitivity, 1950.1ms TimeCoverageRelationStatistics Valid=872, Invalid=4980, Unknown=0, NotChecked=0, Total=5852 [2021-05-22 03:00:54,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15902 states. [2021-05-22 03:00:54,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15902 to 13200. [2021-05-22 03:00:54,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13200 states, 13199 states have (on average 3.3458595348132434) internal successors, (44162), 13199 states have internal predecessors, (44162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:54,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13200 states to 13200 states and 44162 transitions. [2021-05-22 03:00:54,772 INFO L78 Accepts]: Start accepts. Automaton has 13200 states and 44162 transitions. Word has length 36 [2021-05-22 03:00:54,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:00:54,772 INFO L482 AbstractCegarLoop]: Abstraction has 13200 states and 44162 transitions. [2021-05-22 03:00:54,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:54,773 INFO L276 IsEmpty]: Start isEmpty. Operand 13200 states and 44162 transitions. [2021-05-22 03:00:54,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 03:00:54,789 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:00:54,789 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:00:54,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1525,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:54,989 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:00:54,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:00:54,990 INFO L82 PathProgramCache]: Analyzing trace with hash -720710023, now seen corresponding path program 202 times [2021-05-22 03:00:54,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:00:54,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351338461] [2021-05-22 03:00:54,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:00:54,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:55,259 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:55,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:00:55,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351338461] [2021-05-22 03:00:55,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351338461] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:55,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527006922] [2021-05-22 03:00:55,260 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:55,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 03:00:55,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:00:55,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 03:00:55,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:00:55,763 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:55,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527006922] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:55,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:00:55,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 03:00:55,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857373694] [2021-05-22 03:00:55,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 03:00:55,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:00:55,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 03:00:55,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 03:00:55,764 INFO L87 Difference]: Start difference. First operand 13200 states and 44162 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:57,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:00:57,729 INFO L93 Difference]: Finished difference Result 17601 states and 57699 transitions. [2021-05-22 03:00:57,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-22 03:00:57,729 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 03:00:57,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:00:57,755 INFO L225 Difference]: With dead ends: 17601 [2021-05-22 03:00:57,755 INFO L226 Difference]: Without dead ends: 17408 [2021-05-22 03:00:57,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1739.2ms TimeCoverageRelationStatistics Valid=694, Invalid=3728, Unknown=0, NotChecked=0, Total=4422 [2021-05-22 03:00:57,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17408 states. [2021-05-22 03:00:57,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17408 to 13131. [2021-05-22 03:00:57,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13131 states, 13130 states have (on average 3.3465346534653464) internal successors, (43940), 13130 states have internal predecessors, (43940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:57,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13131 states to 13131 states and 43940 transitions. [2021-05-22 03:00:57,996 INFO L78 Accepts]: Start accepts. Automaton has 13131 states and 43940 transitions. Word has length 36 [2021-05-22 03:00:57,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:00:57,996 INFO L482 AbstractCegarLoop]: Abstraction has 13131 states and 43940 transitions. [2021-05-22 03:00:57,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:57,996 INFO L276 IsEmpty]: Start isEmpty. Operand 13131 states and 43940 transitions. [2021-05-22 03:00:58,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 03:00:58,012 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:00:58,012 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:00:58,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1529,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:58,213 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:00:58,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:00:58,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1893894713, now seen corresponding path program 203 times [2021-05-22 03:00:58,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:00:58,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604749301] [2021-05-22 03:00:58,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:00:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:58,510 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:58,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:00:58,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604749301] [2021-05-22 03:00:58,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604749301] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:58,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267225853] [2021-05-22 03:00:58,511 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:58,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 03:00:58,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:00:58,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 03:00:58,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:00:59,086 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:59,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267225853] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:59,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:00:59,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 03:00:59,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856688380] [2021-05-22 03:00:59,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 03:00:59,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:00:59,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 03:00:59,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 03:00:59,087 INFO L87 Difference]: Start difference. First operand 13131 states and 43940 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:00,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:01:00,754 INFO L93 Difference]: Finished difference Result 15695 states and 51668 transitions. [2021-05-22 03:01:00,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-22 03:01:00,754 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 03:01:00,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:01:00,779 INFO L225 Difference]: With dead ends: 15695 [2021-05-22 03:01:00,779 INFO L226 Difference]: Without dead ends: 15627 [2021-05-22 03:01:00,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1458.8ms TimeCoverageRelationStatistics Valid=528, Invalid=2894, Unknown=0, NotChecked=0, Total=3422 [2021-05-22 03:01:00,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15627 states. [2021-05-22 03:01:01,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15627 to 13309. [2021-05-22 03:01:01,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13309 states, 13308 states have (on average 3.3435527502254283) internal successors, (44496), 13308 states have internal predecessors, (44496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:01,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13309 states to 13309 states and 44496 transitions. [2021-05-22 03:01:01,040 INFO L78 Accepts]: Start accepts. Automaton has 13309 states and 44496 transitions. Word has length 36 [2021-05-22 03:01:01,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:01:01,040 INFO L482 AbstractCegarLoop]: Abstraction has 13309 states and 44496 transitions. [2021-05-22 03:01:01,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:01,041 INFO L276 IsEmpty]: Start isEmpty. Operand 13309 states and 44496 transitions. [2021-05-22 03:01:01,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 03:01:01,056 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:01:01,056 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:01:01,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1534,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:01:01,256 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:01:01,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:01:01,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1479370443, now seen corresponding path program 204 times [2021-05-22 03:01:01,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:01:01,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864282539] [2021-05-22 03:01:01,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:01:01,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:01:01,539 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:01,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:01:01,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864282539] [2021-05-22 03:01:01,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864282539] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:01,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141990455] [2021-05-22 03:01:01,540 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:01:01,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 03:01:01,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:01:01,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 03:01:01,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:01:02,094 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:02,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141990455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:02,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:01:02,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-05-22 03:01:02,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176682417] [2021-05-22 03:01:02,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-22 03:01:02,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:01:02,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-22 03:01:02,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 03:01:02,095 INFO L87 Difference]: Start difference. First operand 13309 states and 44496 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:04,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:01:04,316 INFO L93 Difference]: Finished difference Result 16819 states and 55437 transitions. [2021-05-22 03:01:04,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-22 03:01:04,317 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 03:01:04,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:01:04,343 INFO L225 Difference]: With dead ends: 16819 [2021-05-22 03:01:04,344 INFO L226 Difference]: Without dead ends: 16699 [2021-05-22 03:01:04,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1644.6ms TimeCoverageRelationStatistics Valid=618, Invalid=3288, Unknown=0, NotChecked=0, Total=3906 [2021-05-22 03:01:04,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16699 states. [2021-05-22 03:01:04,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16699 to 13309. [2021-05-22 03:01:04,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13309 states, 13308 states have (on average 3.3435527502254283) internal successors, (44496), 13308 states have internal predecessors, (44496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:04,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13309 states to 13309 states and 44496 transitions. [2021-05-22 03:01:04,648 INFO L78 Accepts]: Start accepts. Automaton has 13309 states and 44496 transitions. Word has length 36 [2021-05-22 03:01:04,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:01:04,648 INFO L482 AbstractCegarLoop]: Abstraction has 13309 states and 44496 transitions. [2021-05-22 03:01:04,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:04,648 INFO L276 IsEmpty]: Start isEmpty. Operand 13309 states and 44496 transitions. [2021-05-22 03:01:04,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 03:01:04,664 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:01:04,664 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:01:04,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1538,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:01:04,865 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:01:04,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:01:04,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1549480479, now seen corresponding path program 205 times [2021-05-22 03:01:04,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:01:04,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136024596] [2021-05-22 03:01:04,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:01:04,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:01:05,155 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:05,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:01:05,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136024596] [2021-05-22 03:01:05,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136024596] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:05,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429114516] [2021-05-22 03:01:05,155 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:01:05,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:01:05,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 03:01:05,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:01:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:05,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429114516] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:05,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:01:05,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 03:01:05,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489374028] [2021-05-22 03:01:05,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 03:01:05,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:01:05,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 03:01:05,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 03:01:05,790 INFO L87 Difference]: Start difference. First operand 13309 states and 44496 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:07,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:01:07,965 INFO L93 Difference]: Finished difference Result 15829 states and 52209 transitions. [2021-05-22 03:01:07,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-22 03:01:07,965 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 03:01:07,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:01:07,989 INFO L225 Difference]: With dead ends: 15829 [2021-05-22 03:01:07,990 INFO L226 Difference]: Without dead ends: 15709 [2021-05-22 03:01:07,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1773.0ms TimeCoverageRelationStatistics Valid=646, Invalid=3514, Unknown=0, NotChecked=0, Total=4160 [2021-05-22 03:01:08,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15709 states. [2021-05-22 03:01:08,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15709 to 13309. [2021-05-22 03:01:08,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13309 states, 13308 states have (on average 3.3435527502254283) internal successors, (44496), 13308 states have internal predecessors, (44496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:08,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13309 states to 13309 states and 44496 transitions. [2021-05-22 03:01:08,205 INFO L78 Accepts]: Start accepts. Automaton has 13309 states and 44496 transitions. Word has length 36 [2021-05-22 03:01:08,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:01:08,205 INFO L482 AbstractCegarLoop]: Abstraction has 13309 states and 44496 transitions. [2021-05-22 03:01:08,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:08,205 INFO L276 IsEmpty]: Start isEmpty. Operand 13309 states and 44496 transitions. [2021-05-22 03:01:08,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 03:01:08,222 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:01:08,222 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:01:08,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1548,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:01:08,422 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:01:08,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:01:08,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1172565493, now seen corresponding path program 206 times [2021-05-22 03:01:08,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:01:08,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529852815] [2021-05-22 03:01:08,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:01:08,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:01:08,710 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:08,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:01:08,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529852815] [2021-05-22 03:01:08,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529852815] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:08,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558253057] [2021-05-22 03:01:08,711 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:01:08,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 03:01:08,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:01:08,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 03:01:08,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:01:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:09,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558253057] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:09,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:01:09,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-22 03:01:09,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293812302] [2021-05-22 03:01:09,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 03:01:09,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:01:09,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 03:01:09,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 03:01:09,209 INFO L87 Difference]: Start difference. First operand 13309 states and 44496 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:12,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:01:12,073 INFO L93 Difference]: Finished difference Result 15446 states and 50486 transitions. [2021-05-22 03:01:12,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-22 03:01:12,073 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 03:01:12,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:01:12,097 INFO L225 Difference]: With dead ends: 15446 [2021-05-22 03:01:12,097 INFO L226 Difference]: Without dead ends: 15180 [2021-05-22 03:01:12,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1905 ImplicationChecksByTransitivity, 2167.3ms TimeCoverageRelationStatistics Valid=884, Invalid=5922, Unknown=0, NotChecked=0, Total=6806 [2021-05-22 03:01:12,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15180 states. [2021-05-22 03:01:12,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15180 to 13367. [2021-05-22 03:01:12,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13367 states, 13366 states have (on average 3.3434086488104144) internal successors, (44688), 13366 states have internal predecessors, (44688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:12,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13367 states to 13367 states and 44688 transitions. [2021-05-22 03:01:12,367 INFO L78 Accepts]: Start accepts. Automaton has 13367 states and 44688 transitions. Word has length 36 [2021-05-22 03:01:12,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:01:12,367 INFO L482 AbstractCegarLoop]: Abstraction has 13367 states and 44688 transitions. [2021-05-22 03:01:12,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:12,367 INFO L276 IsEmpty]: Start isEmpty. Operand 13367 states and 44688 transitions. [2021-05-22 03:01:12,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 03:01:12,383 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:01:12,383 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:01:12,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1558,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:01:12,584 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:01:12,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:01:12,584 INFO L82 PathProgramCache]: Analyzing trace with hash -786176099, now seen corresponding path program 207 times [2021-05-22 03:01:12,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:01:12,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650206931] [2021-05-22 03:01:12,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:01:12,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:01:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:12,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:01:12,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650206931] [2021-05-22 03:01:12,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650206931] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:12,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763946516] [2021-05-22 03:01:12,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:01:12,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 03:01:12,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:01:12,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 03:01:12,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:01:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:13,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763946516] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:13,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:01:13,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-22 03:01:13,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949641784] [2021-05-22 03:01:13,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 03:01:13,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:01:13,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 03:01:13,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 03:01:13,288 INFO L87 Difference]: Start difference. First operand 13367 states and 44688 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:16,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:01:16,055 INFO L93 Difference]: Finished difference Result 16208 states and 52802 transitions. [2021-05-22 03:01:16,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-22 03:01:16,056 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 03:01:16,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:01:16,082 INFO L225 Difference]: With dead ends: 16208 [2021-05-22 03:01:16,082 INFO L226 Difference]: Without dead ends: 15974 [2021-05-22 03:01:16,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2039 ImplicationChecksByTransitivity, 2090.8ms TimeCoverageRelationStatistics Valid=994, Invalid=5978, Unknown=0, NotChecked=0, Total=6972 [2021-05-22 03:01:16,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15974 states. [2021-05-22 03:01:16,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15974 to 13370. [2021-05-22 03:01:16,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13370 states, 13369 states have (on average 3.3428079886304136) internal successors, (44690), 13369 states have internal predecessors, (44690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:16,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13370 states to 13370 states and 44690 transitions. [2021-05-22 03:01:16,353 INFO L78 Accepts]: Start accepts. Automaton has 13370 states and 44690 transitions. Word has length 36 [2021-05-22 03:01:16,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:01:16,353 INFO L482 AbstractCegarLoop]: Abstraction has 13370 states and 44690 transitions. [2021-05-22 03:01:16,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:16,354 INFO L276 IsEmpty]: Start isEmpty. Operand 13370 states and 44690 transitions. [2021-05-22 03:01:16,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-22 03:01:16,371 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:01:16,371 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:01:16,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1562 [2021-05-22 03:01:16,571 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:01:16,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:01:16,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1817707979, now seen corresponding path program 208 times [2021-05-22 03:01:16,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:01:16,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13098997] [2021-05-22 03:01:16,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:01:16,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:01:16,805 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:16,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:01:16,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13098997] [2021-05-22 03:01:16,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13098997] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:16,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97426186] [2021-05-22 03:01:16,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:01:16,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 03:01:16,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:01:16,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 03:01:16,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:01:17,303 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:17,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97426186] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:17,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:01:17,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 03:01:17,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741597791] [2021-05-22 03:01:17,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 03:01:17,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:01:17,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 03:01:17,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 03:01:17,304 INFO L87 Difference]: Start difference. First operand 13370 states and 44690 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:19,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:01:19,473 INFO L93 Difference]: Finished difference Result 18303 states and 60296 transitions. [2021-05-22 03:01:19,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-22 03:01:19,473 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-22 03:01:19,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:01:19,501 INFO L225 Difference]: With dead ends: 18303 [2021-05-22 03:01:19,501 INFO L226 Difference]: Without dead ends: 18110 [2021-05-22 03:01:19,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 1772.1ms TimeCoverageRelationStatistics Valid=781, Invalid=4475, Unknown=0, NotChecked=0, Total=5256 [2021-05-22 03:01:19,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18110 states. [2021-05-22 03:01:19,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18110 to 13307. [2021-05-22 03:01:19,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13307 states, 13306 states have (on average 3.343003156470765) internal successors, (44482), 13306 states have internal predecessors, (44482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:19,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13307 states to 13307 states and 44482 transitions. [2021-05-22 03:01:19,753 INFO L78 Accepts]: Start accepts. Automaton has 13307 states and 44482 transitions. Word has length 36 [2021-05-22 03:01:19,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:01:19,753 INFO L482 AbstractCegarLoop]: Abstraction has 13307 states and 44482 transitions. [2021-05-22 03:01:19,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:19,753 INFO L276 IsEmpty]: Start isEmpty. Operand 13307 states and 44482 transitions. [2021-05-22 03:01:19,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-22 03:01:19,771 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:01:19,771 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:01:19,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1566,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:01:19,971 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:01:19,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:01:19,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1963299463, now seen corresponding path program 209 times [2021-05-22 03:01:19,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:01:19,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984431949] [2021-05-22 03:01:19,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:01:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:01:20,207 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-22 03:01:20,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:01:20,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984431949] [2021-05-22 03:01:20,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984431949] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:20,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356346712] [2021-05-22 03:01:20,208 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:01:20,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 03:01:20,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:01:20,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 03:01:20,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:01:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:20,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356346712] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:20,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:01:20,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22] total 36 [2021-05-22 03:01:20,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567090889] [2021-05-22 03:01:20,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 03:01:20,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:01:20,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 03:01:20,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 03:01:20,861 INFO L87 Difference]: Start difference. First operand 13307 states and 44482 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:22,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:01:22,515 INFO L93 Difference]: Finished difference Result 14804 states and 48486 transitions. [2021-05-22 03:01:22,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-22 03:01:22,516 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-22 03:01:22,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:01:22,538 INFO L225 Difference]: With dead ends: 14804 [2021-05-22 03:01:22,538 INFO L226 Difference]: Without dead ends: 14762 [2021-05-22 03:01:22,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 1497.9ms TimeCoverageRelationStatistics Valid=602, Invalid=3688, Unknown=0, NotChecked=0, Total=4290 [2021-05-22 03:01:22,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14762 states. [2021-05-22 03:01:22,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14762 to 13901. [2021-05-22 03:01:22,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13901 states, 13900 states have (on average 3.3212230215827336) internal successors, (46165), 13900 states have internal predecessors, (46165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:22,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13901 states to 13901 states and 46165 transitions. [2021-05-22 03:01:22,773 INFO L78 Accepts]: Start accepts. Automaton has 13901 states and 46165 transitions. Word has length 38 [2021-05-22 03:01:22,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:01:22,773 INFO L482 AbstractCegarLoop]: Abstraction has 13901 states and 46165 transitions. [2021-05-22 03:01:22,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:22,773 INFO L276 IsEmpty]: Start isEmpty. Operand 13901 states and 46165 transitions. [2021-05-22 03:01:22,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-22 03:01:22,791 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:01:22,791 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:01:22,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1571,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:01:22,991 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:01:22,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:01:22,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1125372295, now seen corresponding path program 210 times [2021-05-22 03:01:22,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:01:22,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785731258] [2021-05-22 03:01:22,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:01:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:01:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-22 03:01:23,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:01:23,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785731258] [2021-05-22 03:01:23,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785731258] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:23,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852081875] [2021-05-22 03:01:23,198 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:01:23,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 03:01:23,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:01:23,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-22 03:01:23,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:01:23,828 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-05-22 03:01:24,186 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-05-22 03:01:24,466 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-05-22 03:01:24,663 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:24,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852081875] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:24,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:01:24,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2021-05-22 03:01:24,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591134848] [2021-05-22 03:01:24,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-22 03:01:24,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:01:24,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-22 03:01:24,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 03:01:24,664 INFO L87 Difference]: Start difference. First operand 13901 states and 46165 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:27,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:01:27,835 INFO L93 Difference]: Finished difference Result 14813 states and 48624 transitions. [2021-05-22 03:01:27,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-22 03:01:27,835 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-22 03:01:27,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:01:27,855 INFO L225 Difference]: With dead ends: 14813 [2021-05-22 03:01:27,855 INFO L226 Difference]: Without dead ends: 14761 [2021-05-22 03:01:27,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1294 ImplicationChecksByTransitivity, 2690.4ms TimeCoverageRelationStatistics Valid=655, Invalid=4601, Unknown=0, NotChecked=0, Total=5256 [2021-05-22 03:01:27,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14761 states. [2021-05-22 03:01:28,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14761 to 13551. [2021-05-22 03:01:28,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13551 states, 13550 states have (on average 3.335350553505535) internal successors, (45194), 13550 states have internal predecessors, (45194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:28,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13551 states to 13551 states and 45194 transitions. [2021-05-22 03:01:28,073 INFO L78 Accepts]: Start accepts. Automaton has 13551 states and 45194 transitions. Word has length 38 [2021-05-22 03:01:28,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:01:28,073 INFO L482 AbstractCegarLoop]: Abstraction has 13551 states and 45194 transitions. [2021-05-22 03:01:28,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:28,073 INFO L276 IsEmpty]: Start isEmpty. Operand 13551 states and 45194 transitions. [2021-05-22 03:01:28,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-22 03:01:28,090 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:01:28,090 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:01:28,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1580,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:01:28,291 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:01:28,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:01:28,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1432686471, now seen corresponding path program 211 times [2021-05-22 03:01:28,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:01:28,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442684003] [2021-05-22 03:01:28,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:01:28,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:01:28,583 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:28,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:01:28,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442684003] [2021-05-22 03:01:28,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442684003] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:28,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802521424] [2021-05-22 03:01:28,583 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:01:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:01:28,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-22 03:01:28,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:01:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:29,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802521424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:29,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:01:29,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-22 03:01:29,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991471767] [2021-05-22 03:01:29,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-22 03:01:29,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:01:29,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-22 03:01:29,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1530, Unknown=0, NotChecked=0, Total=1806 [2021-05-22 03:01:29,312 INFO L87 Difference]: Start difference. First operand 13551 states and 45194 transitions. Second operand has 43 states, 43 states have (on average 1.697674418604651) internal successors, (73), 42 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) [2021-05-22 03:01:30,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:01:30,846 INFO L93 Difference]: Finished difference Result 14402 states and 47375 transitions. [2021-05-22 03:01:30,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-22 03:01:30,847 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.697674418604651) internal successors, (73), 42 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) Word has length 38 [2021-05-22 03:01:30,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:01:30,869 INFO L225 Difference]: With dead ends: 14402 [2021-05-22 03:01:30,869 INFO L226 Difference]: Without dead ends: 14333 [2021-05-22 03:01:30,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 1622.3ms TimeCoverageRelationStatistics Valid=896, Invalid=4360, Unknown=0, NotChecked=0, Total=5256 [2021-05-22 03:01:30,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14333 states. [2021-05-22 03:01:31,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14333 to 13799. [2021-05-22 03:01:31,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13799 states, 13798 states have (on average 3.3281635019568054) internal successors, (45922), 13798 states have internal predecessors, (45922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:31,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13799 states to 13799 states and 45922 transitions. [2021-05-22 03:01:31,172 INFO L78 Accepts]: Start accepts. Automaton has 13799 states and 45922 transitions. Word has length 38 [2021-05-22 03:01:31,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:01:31,172 INFO L482 AbstractCegarLoop]: Abstraction has 13799 states and 45922 transitions. [2021-05-22 03:01:31,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.697674418604651) internal successors, (73), 42 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) [2021-05-22 03:01:31,172 INFO L276 IsEmpty]: Start isEmpty. Operand 13799 states and 45922 transitions. [2021-05-22 03:01:31,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-22 03:01:31,193 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:01:31,193 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:01:31,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1600,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:01:31,393 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:01:31,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:01:31,394 INFO L82 PathProgramCache]: Analyzing trace with hash -279015545, now seen corresponding path program 212 times [2021-05-22 03:01:31,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:01:31,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791563744] [2021-05-22 03:01:31,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:01:31,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:01:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:31,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:01:31,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791563744] [2021-05-22 03:01:31,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791563744] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:31,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138163285] [2021-05-22 03:01:31,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:01:31,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 03:01:31,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:01:31,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 03:01:31,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:01:32,354 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-05-22 03:01:32,641 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-05-22 03:01:32,846 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-05-22 03:01:33,023 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:33,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138163285] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:33,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:01:33,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 38 [2021-05-22 03:01:33,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838502884] [2021-05-22 03:01:33,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-22 03:01:33,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:01:33,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-22 03:01:33,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1301, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 03:01:33,024 INFO L87 Difference]: Start difference. First operand 13799 states and 45922 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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) [2021-05-22 03:01:36,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:01:36,194 INFO L93 Difference]: Finished difference Result 15413 states and 50212 transitions. [2021-05-22 03:01:36,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-22 03:01:36,194 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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) Word has length 38 [2021-05-22 03:01:36,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:01:36,217 INFO L225 Difference]: With dead ends: 15413 [2021-05-22 03:01:36,218 INFO L226 Difference]: Without dead ends: 15361 [2021-05-22 03:01:36,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1863 ImplicationChecksByTransitivity, 2961.8ms TimeCoverageRelationStatistics Valid=959, Invalid=5847, Unknown=0, NotChecked=0, Total=6806 [2021-05-22 03:01:36,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15361 states. [2021-05-22 03:01:36,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15361 to 14189. [2021-05-22 03:01:36,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14189 states, 14188 states have (on average 3.3183676346208064) internal successors, (47081), 14188 states have internal predecessors, (47081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:36,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14189 states to 14189 states and 47081 transitions. [2021-05-22 03:01:36,456 INFO L78 Accepts]: Start accepts. Automaton has 14189 states and 47081 transitions. Word has length 38 [2021-05-22 03:01:36,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:01:36,456 INFO L482 AbstractCegarLoop]: Abstraction has 14189 states and 47081 transitions. [2021-05-22 03:01:36,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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) [2021-05-22 03:01:36,457 INFO L276 IsEmpty]: Start isEmpty. Operand 14189 states and 47081 transitions. [2021-05-22 03:01:36,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-22 03:01:36,474 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:01:36,474 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:01:36,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1609,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:01:36,676 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:01:36,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:01:36,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1116942713, now seen corresponding path program 213 times [2021-05-22 03:01:36,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:01:36,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322556278] [2021-05-22 03:01:36,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:01:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:01:36,904 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 03:01:36,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:01:36,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322556278] [2021-05-22 03:01:36,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322556278] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:36,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109811034] [2021-05-22 03:01:36,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:01:36,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 03:01:36,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:01:36,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 03:01:36,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:01:37,814 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-05-22 03:01:38,085 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-05-22 03:01:38,273 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:38,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109811034] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:38,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:01:38,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-05-22 03:01:38,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366392330] [2021-05-22 03:01:38,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-22 03:01:38,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:01:38,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-22 03:01:38,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1234, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 03:01:38,274 INFO L87 Difference]: Start difference. First operand 14189 states and 47081 transitions. Second operand has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 37 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:41,338 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-05-22 03:01:41,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:01:41,775 INFO L93 Difference]: Finished difference Result 15652 states and 51079 transitions. [2021-05-22 03:01:41,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-22 03:01:41,776 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 37 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-22 03:01:41,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:01:41,800 INFO L225 Difference]: With dead ends: 15652 [2021-05-22 03:01:41,800 INFO L226 Difference]: Without dead ends: 15585 [2021-05-22 03:01:41,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1882 ImplicationChecksByTransitivity, 3321.5ms TimeCoverageRelationStatistics Valid=969, Invalid=5837, Unknown=0, NotChecked=0, Total=6806 [2021-05-22 03:01:41,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15585 states. [2021-05-22 03:01:41,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15585 to 14537. [2021-05-22 03:01:42,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14537 states, 14536 states have (on average 3.3106081452944416) internal successors, (48123), 14536 states have internal predecessors, (48123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:42,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14537 states to 14537 states and 48123 transitions. [2021-05-22 03:01:42,040 INFO L78 Accepts]: Start accepts. Automaton has 14537 states and 48123 transitions. Word has length 38 [2021-05-22 03:01:42,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:01:42,040 INFO L482 AbstractCegarLoop]: Abstraction has 14537 states and 48123 transitions. [2021-05-22 03:01:42,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 37 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:42,040 INFO L276 IsEmpty]: Start isEmpty. Operand 14537 states and 48123 transitions. [2021-05-22 03:01:42,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-22 03:01:42,058 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:01:42,059 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:01:42,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1627,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:01:42,259 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:01:42,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:01:42,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1088900487, now seen corresponding path program 214 times [2021-05-22 03:01:42,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:01:42,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216442294] [2021-05-22 03:01:42,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:01:42,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:01:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 03:01:42,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:01:42,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216442294] [2021-05-22 03:01:42,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216442294] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:42,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890918080] [2021-05-22 03:01:42,528 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:01:42,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 03:01:42,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:01:42,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-22 03:01:42,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:01:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:43,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890918080] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:43,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:01:43,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 41 [2021-05-22 03:01:43,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772640676] [2021-05-22 03:01:43,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-22 03:01:43,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:01:43,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-22 03:01:43,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1415, Unknown=0, NotChecked=0, Total=1722 [2021-05-22 03:01:43,300 INFO L87 Difference]: Start difference. First operand 14537 states and 48123 transitions. Second operand has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 41 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:44,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:01:44,595 INFO L93 Difference]: Finished difference Result 15189 states and 49770 transitions. [2021-05-22 03:01:44,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-22 03:01:44,596 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 41 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-22 03:01:44,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:01:44,619 INFO L225 Difference]: With dead ends: 15189 [2021-05-22 03:01:44,620 INFO L226 Difference]: Without dead ends: 15135 [2021-05-22 03:01:44,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 1538.1ms TimeCoverageRelationStatistics Valid=814, Invalid=3608, Unknown=0, NotChecked=0, Total=4422 [2021-05-22 03:01:44,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15135 states. [2021-05-22 03:01:44,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15135 to 14625. [2021-05-22 03:01:44,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14625 states, 14624 states have (on average 3.3081920131291027) internal successors, (48379), 14624 states have internal predecessors, (48379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:44,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14625 states to 14625 states and 48379 transitions. [2021-05-22 03:01:44,852 INFO L78 Accepts]: Start accepts. Automaton has 14625 states and 48379 transitions. Word has length 38 [2021-05-22 03:01:44,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:01:44,852 INFO L482 AbstractCegarLoop]: Abstraction has 14625 states and 48379 transitions. [2021-05-22 03:01:44,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 41 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:44,852 INFO L276 IsEmpty]: Start isEmpty. Operand 14625 states and 48379 transitions. [2021-05-22 03:01:44,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-22 03:01:44,870 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:01:44,870 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:01:45,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1644 [2021-05-22 03:01:45,070 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:01:45,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:01:45,071 INFO L82 PathProgramCache]: Analyzing trace with hash -809628537, now seen corresponding path program 215 times [2021-05-22 03:01:45,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:01:45,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521149351] [2021-05-22 03:01:45,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:01:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:01:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:45,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:01:45,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521149351] [2021-05-22 03:01:45,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521149351] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:45,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026607383] [2021-05-22 03:01:45,446 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:01:45,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 03:01:45,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:01:45,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-22 03:01:45,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:01:46,145 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:46,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026607383] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:46,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:01:46,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2021-05-22 03:01:46,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953934025] [2021-05-22 03:01:46,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-22 03:01:46,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:01:46,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-22 03:01:46,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1650, Unknown=0, NotChecked=0, Total=1980 [2021-05-22 03:01:46,146 INFO L87 Difference]: Start difference. First operand 14625 states and 48379 transitions. Second operand has 45 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 44 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) [2021-05-22 03:01:48,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:01:48,040 INFO L93 Difference]: Finished difference Result 15537 states and 50662 transitions. [2021-05-22 03:01:48,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-22 03:01:48,040 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 44 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) Word has length 38 [2021-05-22 03:01:48,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:01:48,064 INFO L225 Difference]: With dead ends: 15537 [2021-05-22 03:01:48,065 INFO L226 Difference]: Without dead ends: 15483 [2021-05-22 03:01:48,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 1952.2ms TimeCoverageRelationStatistics Valid=1242, Invalid=5730, Unknown=0, NotChecked=0, Total=6972 [2021-05-22 03:01:48,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15483 states. [2021-05-22 03:01:48,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15483 to 14693. [2021-05-22 03:01:48,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14693 states, 14692 states have (on average 3.307173972229785) internal successors, (48589), 14692 states have internal predecessors, (48589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:48,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14693 states to 14693 states and 48589 transitions. [2021-05-22 03:01:48,314 INFO L78 Accepts]: Start accepts. Automaton has 14693 states and 48589 transitions. Word has length 38 [2021-05-22 03:01:48,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:01:48,314 INFO L482 AbstractCegarLoop]: Abstraction has 14693 states and 48589 transitions. [2021-05-22 03:01:48,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 44 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) [2021-05-22 03:01:48,314 INFO L276 IsEmpty]: Start isEmpty. Operand 14693 states and 48589 transitions. [2021-05-22 03:01:48,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-22 03:01:48,333 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:01:48,333 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:01:48,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1653,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:01:48,533 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:01:48,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:01:48,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1750432637, now seen corresponding path program 216 times [2021-05-22 03:01:48,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:01:48,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091928424] [2021-05-22 03:01:48,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:01:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:01:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:48,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:01:48,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091928424] [2021-05-22 03:01:48,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091928424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:48,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152657832] [2021-05-22 03:01:48,836 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:01:48,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 03:01:48,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:01:48,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-22 03:01:48,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:01:49,752 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-05-22 03:01:50,005 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-05-22 03:01:50,239 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:50,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152657832] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:50,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:01:50,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 42 [2021-05-22 03:01:50,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781288321] [2021-05-22 03:01:50,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-22 03:01:50,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:01:50,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-22 03:01:50,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806 [2021-05-22 03:01:50,240 INFO L87 Difference]: Start difference. First operand 14693 states and 48589 transitions. Second operand has 43 states, 43 states have (on average 1.697674418604651) internal successors, (73), 42 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) [2021-05-22 03:01:53,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:01:53,228 INFO L93 Difference]: Finished difference Result 17140 states and 55408 transitions. [2021-05-22 03:01:53,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-22 03:01:53,229 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.697674418604651) internal successors, (73), 42 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) Word has length 38 [2021-05-22 03:01:53,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:01:53,255 INFO L225 Difference]: With dead ends: 17140 [2021-05-22 03:01:53,255 INFO L226 Difference]: Without dead ends: 17061 [2021-05-22 03:01:53,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1937 ImplicationChecksByTransitivity, 2908.8ms TimeCoverageRelationStatistics Valid=1079, Invalid=6231, Unknown=0, NotChecked=0, Total=7310 [2021-05-22 03:01:53,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17061 states. [2021-05-22 03:01:53,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17061 to 15235. [2021-05-22 03:01:53,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15235 states, 15234 states have (on average 3.302021793356965) internal successors, (50303), 15234 states have internal predecessors, (50303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:53,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15235 states to 15235 states and 50303 transitions. [2021-05-22 03:01:53,512 INFO L78 Accepts]: Start accepts. Automaton has 15235 states and 50303 transitions. Word has length 38 [2021-05-22 03:01:53,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:01:53,512 INFO L482 AbstractCegarLoop]: Abstraction has 15235 states and 50303 transitions. [2021-05-22 03:01:53,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.697674418604651) internal successors, (73), 42 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) [2021-05-22 03:01:53,512 INFO L276 IsEmpty]: Start isEmpty. Operand 15235 states and 50303 transitions. [2021-05-22 03:01:53,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-22 03:01:53,530 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:01:53,530 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:01:53,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1654 [2021-05-22 03:01:53,731 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:01:53,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:01:53,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1111460795, now seen corresponding path program 217 times [2021-05-22 03:01:53,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:01:53,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307927542] [2021-05-22 03:01:53,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:01:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:01:54,090 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:54,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:01:54,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307927542] [2021-05-22 03:01:54,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307927542] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:54,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043563225] [2021-05-22 03:01:54,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:01:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:01:54,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-22 03:01:54,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:01:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:54,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043563225] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:54,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:01:54,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 40 [2021-05-22 03:01:54,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926756776] [2021-05-22 03:01:54,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-22 03:01:54,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:01:54,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-22 03:01:54,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1343, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 03:01:54,910 INFO L87 Difference]: Start difference. First operand 15235 states and 50303 transitions. Second operand has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:00,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:02:00,225 INFO L93 Difference]: Finished difference Result 28519 states and 89633 transitions. [2021-05-22 03:02:00,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-22 03:02:00,226 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-22 03:02:00,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:02:00,266 INFO L225 Difference]: With dead ends: 28519 [2021-05-22 03:02:00,267 INFO L226 Difference]: Without dead ends: 28346 [2021-05-22 03:02:00,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3807 ImplicationChecksByTransitivity, 4305.2ms TimeCoverageRelationStatistics Valid=1933, Invalid=9623, Unknown=0, NotChecked=0, Total=11556 [2021-05-22 03:02:00,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28346 states. [2021-05-22 03:02:00,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28346 to 15270. [2021-05-22 03:02:00,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15270 states, 15269 states have (on average 3.3037527015521646) internal successors, (50445), 15269 states have internal predecessors, (50445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:00,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15270 states to 15270 states and 50445 transitions. [2021-05-22 03:02:00,603 INFO L78 Accepts]: Start accepts. Automaton has 15270 states and 50445 transitions. Word has length 38 [2021-05-22 03:02:00,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:02:00,604 INFO L482 AbstractCegarLoop]: Abstraction has 15270 states and 50445 transitions. [2021-05-22 03:02:00,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:00,604 INFO L276 IsEmpty]: Start isEmpty. Operand 15270 states and 50445 transitions. [2021-05-22 03:02:00,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-22 03:02:00,622 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:02:00,622 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:02:00,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1671 [2021-05-22 03:02:00,823 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:02:00,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:02:00,823 INFO L82 PathProgramCache]: Analyzing trace with hash 2033162935, now seen corresponding path program 218 times [2021-05-22 03:02:00,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:02:00,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622011017] [2021-05-22 03:02:00,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:02:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:02:01,099 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:02:01,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:02:01,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622011017] [2021-05-22 03:02:01,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622011017] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:02:01,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228918110] [2021-05-22 03:02:01,100 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:02:01,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 03:02:01,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:02:01,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-22 03:02:01,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:02:01,992 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:02:01,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228918110] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:02:01,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:02:01,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 40 [2021-05-22 03:02:01,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685192376] [2021-05-22 03:02:01,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-22 03:02:01,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:02:01,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-22 03:02:01,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=1331, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 03:02:01,993 INFO L87 Difference]: Start difference. First operand 15270 states and 50445 transitions. Second operand has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-05-22 03:02:05,285 WARN L222 SmtUtils]: Removed 3 from assertion stack [2021-05-22 03:02:05,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-22 03:02:05,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1683 [2021-05-22 03:02:05,485 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-22 03:02:05,486 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was TIMEOUT (1/2) [2021-05-22 03:02:05,487 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-22 03:02:05,490 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 03:02:05,490 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 03:02:05,491 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 03:02:05,491 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 03:02:05,491 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 03:02:05,491 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 03:02:05,491 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 03:02:05,491 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-05-22 03:02:05,491 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 33 transitions, 90 flow [2021-05-22 03:02:05,492 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-22 03:02:05,492 INFO L315 ceAbstractionStarter]: Result for error location InUseError was TIMEOUT (2/2) [2021-05-22 03:02:05,492 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-22 03:02:05,493 WARN L196 ceAbstractionStarter]: Timeout [2021-05-22 03:02:05,493 INFO L202 PluginConnector]: Adding new model threaded-sum-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.05 03:02:05 BasicIcfg [2021-05-22 03:02:05,493 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-22 03:02:05,494 INFO L168 Benchmark]: Toolchain (without parser) took 785293.92 ms. Allocated memory was 392.2 MB in the beginning and 2.0 GB in the end (delta: 1.6 GB). Free memory was 371.5 MB in the beginning and 819.8 MB in the end (delta: -448.2 MB). Peak memory consumption was 1.2 GB. Max. memory is 16.0 GB. [2021-05-22 03:02:05,494 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 392.2 MB. Free memory was 372.7 MB in the beginning and 372.7 MB in the end (delta: 76.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 03:02:05,494 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.31 ms. Allocated memory is still 392.2 MB. Free memory was 371.5 MB in the beginning and 370.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 03:02:05,494 INFO L168 Benchmark]: Boogie Preprocessor took 10.79 ms. Allocated memory is still 392.2 MB. Free memory was 370.1 MB in the beginning and 369.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-22 03:02:05,494 INFO L168 Benchmark]: RCFGBuilder took 197.03 ms. Allocated memory is still 392.2 MB. Free memory was 369.0 MB in the beginning and 354.5 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-05-22 03:02:05,494 INFO L168 Benchmark]: TraceAbstraction took 785060.07 ms. Allocated memory was 392.2 MB in the beginning and 2.0 GB in the end (delta: 1.6 GB). Free memory was 354.1 MB in the beginning and 819.8 MB in the end (delta: -465.7 MB). Peak memory consumption was 1.2 GB. Max. memory is 16.0 GB. [2021-05-22 03:02:05,494 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 392.2 MB. Free memory was 372.7 MB in the beginning and 372.7 MB in the end (delta: 76.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 21.31 ms. Allocated memory is still 392.2 MB. Free memory was 371.5 MB in the beginning and 370.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.79 ms. Allocated memory is still 392.2 MB. Free memory was 370.1 MB in the beginning and 369.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 197.03 ms. Allocated memory is still 392.2 MB. Free memory was 369.0 MB in the beginning and 354.5 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 785060.07 ms. Allocated memory was 392.2 MB in the beginning and 2.0 GB in the end (delta: 1.6 GB). Free memory was 354.1 MB in the beginning and 819.8 MB in the end (delta: -465.7 MB). Peak memory consumption was 1.2 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (15270states) and FLOYD_HOARE automaton (currently 72 states, 41 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 57 for 31ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 47 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 784965.8ms, OverallIterations: 221, TraceHistogramMax: 5, EmptinessCheckTime: 2613.2ms, AutomataDifference: 517930.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 40.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7438 SDtfs, 81848 SDslu, 109636 SDs, 0 SdLazy, 465696 SolverSat, 39077 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 166418.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19615 GetRequests, 4082 SyntacticMatches, 419 SemanticMatches, 15113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350387 ImplicationChecksByTransitivity, 437179.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=15270occurred in iteration=220, InterpolantAutomatonStates: 13325, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 42115.7ms AutomataMinimizationTime, 220 MinimizatonAttempts, 1024997 StatesRemovedByMinimization, 218 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 605.5ms SsaConstructionTime, 1881.5ms SatisfiabilityAnalysisTime, 171705.6ms InterpolantComputationTime, 15470 NumberOfCodeBlocks, 15470 NumberOfCodeBlocksAsserted, 924 NumberOfCheckSat, 15032 ConstructedInterpolants, 0 QuantifiedInterpolants, 361590 SizeOfPredicates, 1468 NumberOfNonLiveVariables, 13979 ConjunctsInSsa, 4673 ConjunctsInUnsatCore, 438 InterpolantComputations, 4 PerfectInterpolantSequences, 188/8282 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 - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 7 procedures, 47 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 1.3ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 0.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown