/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-98707888a4ba860d5b57d27ee0e051c5b948cbbf-9870788 [2021-06-01 19:13:41,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-01 19:13:41,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-01 19:13:41,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-01 19:13:41,511 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-01 19:13:41,529 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-01 19:13:41,530 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-01 19:13:41,530 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-01 19:13:41,530 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-01 19:13:41,531 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-01 19:13:41,531 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-01 19:13:41,531 INFO L138 SettingsManager]: * Use SBE=true [2021-06-01 19:13:41,531 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-01 19:13:41,531 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-01 19:13:41,531 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-01 19:13:41,531 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-01 19:13:41,532 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-01 19:13:41,532 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-01 19:13:41,532 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-01 19:13:41,532 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-01 19:13:41,532 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-01 19:13:41,532 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-01 19:13:41,532 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-01 19:13:41,532 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-01 19:13:41,532 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-01 19:13:41,533 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-01 19:13:41,533 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-01 19:13:41,533 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-01 19:13:41,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-01 19:13:41,533 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-01 19:13:41,533 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-01 19:13:41,533 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-01 19:13:41,533 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-01 19:13:41,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-01 19:13:41,534 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-01 19:13:41,534 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-01 19:13:41,534 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-01 19:13:41,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-01 19:13:41,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-01 19:13:41,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-01 19:13:41,759 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-01 19:13:41,760 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-01 19:13:41,760 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl [2021-06-01 19:13:41,760 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl' [2021-06-01 19:13:41,798 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-01 19:13:41,800 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-01 19:13:41,801 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-01 19:13:41,801 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-01 19:13:41,801 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-01 19:13:41,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 07:13:41" (1/1) ... [2021-06-01 19:13:41,815 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 07:13:41" (1/1) ... [2021-06-01 19:13:41,821 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-01 19:13:41,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-01 19:13:41,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-01 19:13:41,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-01 19:13:41,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 07:13:41" (1/1) ... [2021-06-01 19:13:41,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 07:13:41" (1/1) ... [2021-06-01 19:13:41,830 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 07:13:41" (1/1) ... [2021-06-01 19:13:41,830 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 07:13:41" (1/1) ... [2021-06-01 19:13:41,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 07:13:41" (1/1) ... [2021-06-01 19:13:41,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 07:13:41" (1/1) ... [2021-06-01 19:13:41,837 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 07:13:41" (1/1) ... [2021-06-01 19:13:41,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-01 19:13:41,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-01 19:13:41,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-01 19:13:41,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-01 19:13:41,844 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 07:13:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-01 19:13:41,933 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-01 19:13:41,933 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-01 19:13:41,934 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-01 19:13:41,934 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-01 19:13:41,934 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-01 19:13:41,934 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-01 19:13:41,934 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-01 19:13:41,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-01 19:13:41,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-01 19:13:41,934 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-01 19:13:41,935 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-01 19:13:41,936 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-01 19:13:41,936 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-01 19:13:41,936 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-01 19:13:41,936 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-01 19:13:41,937 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-01 19:13:42,150 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-01 19:13:42,150 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-01 19:13:42,151 INFO L202 PluginConnector]: Adding new model counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.06 07:13:42 BoogieIcfgContainer [2021-06-01 19:13:42,151 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-01 19:13:42,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-01 19:13:42,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-01 19:13:42,154 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-01 19:13:42,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 07:13:41" (1/2) ... [2021-06-01 19:13:42,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ef0499e and model type counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.06 07:13:42, skipping insertion in model container [2021-06-01 19:13:42,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.06 07:13:42" (2/2) ... [2021-06-01 19:13:42,156 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-determinism.wvr.bpl [2021-06-01 19:13:42,160 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-01 19:13:42,160 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-01 19:13:42,160 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-01 19:13:42,177 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-01 19:13:42,237 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-01 19:13:42,250 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-01 19:13:42,262 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-01 19:13:42,262 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-01 19:13:42,263 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-01 19:13:42,263 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-01 19:13:42,263 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-01 19:13:42,263 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-01 19:13:42,263 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-01 19:13:42,263 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-01 19:13:42,269 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 39 transitions, 110 flow [2021-06-01 19:13:42,298 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 437 states, 435 states have (on average 3.8183908045977013) internal successors, (1661), 436 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:42,302 INFO L276 IsEmpty]: Start isEmpty. Operand has 437 states, 435 states have (on average 3.8183908045977013) internal successors, (1661), 436 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:42,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 19:13:42,322 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:13:42,323 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:13:42,323 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:13:42,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:13:42,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1357321038, now seen corresponding path program 1 times [2021-06-01 19:13:42,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:13:42,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372933716] [2021-06-01 19:13:42,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:13:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:13:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:13:42,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:13:42,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372933716] [2021-06-01 19:13:42,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372933716] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 19:13:42,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 19:13:42,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-01 19:13:42,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847709295] [2021-06-01 19:13:42,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-01 19:13:42,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:13:42,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-01 19:13:42,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-01 19:13:42,545 INFO L87 Difference]: Start difference. First operand has 437 states, 435 states have (on average 3.8183908045977013) internal successors, (1661), 436 states have internal predecessors, (1661), 0 states have call successors, (0), 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 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:42,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:13:42,632 INFO L93 Difference]: Finished difference Result 1267 states and 4622 transitions. [2021-06-01 19:13:42,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-01 19:13:42,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-01 19:13:42,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:13:42,659 INFO L225 Difference]: With dead ends: 1267 [2021-06-01 19:13:42,660 INFO L226 Difference]: Without dead ends: 1056 [2021-06-01 19:13:42,662 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-01 19:13:42,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-06-01 19:13:42,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 775. [2021-06-01 19:13:42,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.7751937984496124) internal successors, (2922), 774 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:42,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2922 transitions. [2021-06-01 19:13:42,738 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2922 transitions. Word has length 25 [2021-06-01 19:13:42,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:13:42,738 INFO L482 AbstractCegarLoop]: Abstraction has 775 states and 2922 transitions. [2021-06-01 19:13:42,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:42,739 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2922 transitions. [2021-06-01 19:13:42,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-01 19:13:42,741 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:13:42,741 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:13:42,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-01 19:13:42,741 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:13:42,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:13:42,742 INFO L82 PathProgramCache]: Analyzing trace with hash -219840432, now seen corresponding path program 1 times [2021-06-01 19:13:42,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:13:42,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701881783] [2021-06-01 19:13:42,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:13:42,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:13:42,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:13:42,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:13:42,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701881783] [2021-06-01 19:13:42,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701881783] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 19:13:42,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 19:13:42,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-01 19:13:42,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379828662] [2021-06-01 19:13:42,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-01 19:13:42,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:13:42,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-01 19:13:42,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-01 19:13:42,812 INFO L87 Difference]: Start difference. First operand 775 states and 2922 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:42,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:13:42,923 INFO L93 Difference]: Finished difference Result 1405 states and 5168 transitions. [2021-06-01 19:13:42,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-01 19:13:42,923 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-01 19:13:42,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:13:42,930 INFO L225 Difference]: With dead ends: 1405 [2021-06-01 19:13:42,930 INFO L226 Difference]: Without dead ends: 1369 [2021-06-01 19:13:42,931 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-01 19:13:42,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-06-01 19:13:42,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 903. [2021-06-01 19:13:42,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 3.8104212860310422) internal successors, (3437), 902 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:42,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 3437 transitions. [2021-06-01 19:13:42,959 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 3437 transitions. Word has length 27 [2021-06-01 19:13:42,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:13:42,959 INFO L482 AbstractCegarLoop]: Abstraction has 903 states and 3437 transitions. [2021-06-01 19:13:42,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:42,960 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 3437 transitions. [2021-06-01 19:13:42,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-01 19:13:42,962 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:13:42,962 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:13:42,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-01 19:13:42,962 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:13:42,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:13:42,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1181437776, now seen corresponding path program 1 times [2021-06-01 19:13:42,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:13:42,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806466426] [2021-06-01 19:13:42,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:13:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:13:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:13:43,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:13:43,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806466426] [2021-06-01 19:13:43,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806466426] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 19:13:43,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 19:13:43,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-01 19:13:43,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361763188] [2021-06-01 19:13:43,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 19:13:43,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:13:43,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 19:13:43,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-01 19:13:43,033 INFO L87 Difference]: Start difference. First operand 903 states and 3437 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:43,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:13:43,155 INFO L93 Difference]: Finished difference Result 1359 states and 4974 transitions. [2021-06-01 19:13:43,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-01 19:13:43,158 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-01 19:13:43,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:13:43,165 INFO L225 Difference]: With dead ends: 1359 [2021-06-01 19:13:43,166 INFO L226 Difference]: Without dead ends: 1327 [2021-06-01 19:13:43,170 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-01 19:13:43,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-06-01 19:13:43,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 931. [2021-06-01 19:13:43,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.7838709677419353) internal successors, (3519), 930 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:43,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3519 transitions. [2021-06-01 19:13:43,201 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3519 transitions. Word has length 27 [2021-06-01 19:13:43,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:13:43,202 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3519 transitions. [2021-06-01 19:13:43,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:43,202 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3519 transitions. [2021-06-01 19:13:43,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-01 19:13:43,205 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:13:43,205 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:13:43,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-01 19:13:43,205 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:13:43,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:13:43,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1293793296, now seen corresponding path program 2 times [2021-06-01 19:13:43,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:13:43,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687821836] [2021-06-01 19:13:43,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:13:43,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:13:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:13:43,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:13:43,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687821836] [2021-06-01 19:13:43,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687821836] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 19:13:43,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 19:13:43,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-01 19:13:43,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753078783] [2021-06-01 19:13:43,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-01 19:13:43,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:13:43,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-01 19:13:43,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-01 19:13:43,275 INFO L87 Difference]: Start difference. First operand 931 states and 3519 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:43,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:13:43,346 INFO L93 Difference]: Finished difference Result 1126 states and 4123 transitions. [2021-06-01 19:13:43,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-01 19:13:43,348 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-01 19:13:43,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:13:43,353 INFO L225 Difference]: With dead ends: 1126 [2021-06-01 19:13:43,354 INFO L226 Difference]: Without dead ends: 1044 [2021-06-01 19:13:43,354 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-01 19:13:43,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-06-01 19:13:43,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 845. [2021-06-01 19:13:43,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.7831753554502368) internal successors, (3193), 844 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:43,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 3193 transitions. [2021-06-01 19:13:43,379 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 3193 transitions. Word has length 27 [2021-06-01 19:13:43,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:13:43,380 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 3193 transitions. [2021-06-01 19:13:43,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:43,380 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 3193 transitions. [2021-06-01 19:13:43,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-01 19:13:43,382 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:13:43,382 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:13:43,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-01 19:13:43,383 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:13:43,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:13:43,383 INFO L82 PathProgramCache]: Analyzing trace with hash 2011026324, now seen corresponding path program 2 times [2021-06-01 19:13:43,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:13:43,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113432892] [2021-06-01 19:13:43,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:13:43,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:13:43,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:13:43,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:13:43,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113432892] [2021-06-01 19:13:43,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113432892] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 19:13:43,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 19:13:43,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-01 19:13:43,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531242565] [2021-06-01 19:13:43,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-01 19:13:43,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:13:43,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-01 19:13:43,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-01 19:13:43,435 INFO L87 Difference]: Start difference. First operand 845 states and 3193 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:43,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:13:43,518 INFO L93 Difference]: Finished difference Result 1296 states and 4868 transitions. [2021-06-01 19:13:43,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-01 19:13:43,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-01 19:13:43,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:13:43,525 INFO L225 Difference]: With dead ends: 1296 [2021-06-01 19:13:43,525 INFO L226 Difference]: Without dead ends: 1276 [2021-06-01 19:13:43,525 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-01 19:13:43,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-06-01 19:13:43,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 897. [2021-06-01 19:13:43,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.8359375) internal successors, (3437), 896 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:43,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3437 transitions. [2021-06-01 19:13:43,549 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3437 transitions. Word has length 27 [2021-06-01 19:13:43,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:13:43,549 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 3437 transitions. [2021-06-01 19:13:43,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:43,549 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3437 transitions. [2021-06-01 19:13:43,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-01 19:13:43,551 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:13:43,552 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:13:43,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-01 19:13:43,552 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:13:43,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:13:43,552 INFO L82 PathProgramCache]: Analyzing trace with hash 30382996, now seen corresponding path program 3 times [2021-06-01 19:13:43,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:13:43,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269845298] [2021-06-01 19:13:43,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:13:43,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:13:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:13:43,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:13:43,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269845298] [2021-06-01 19:13:43,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269845298] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 19:13:43,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 19:13:43,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-01 19:13:43,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507009685] [2021-06-01 19:13:43,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-01 19:13:43,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:13:43,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-01 19:13:43,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-01 19:13:43,607 INFO L87 Difference]: Start difference. First operand 897 states and 3437 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:43,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:13:43,692 INFO L93 Difference]: Finished difference Result 1772 states and 6736 transitions. [2021-06-01 19:13:43,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 19:13:43,692 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-01 19:13:43,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:13:43,700 INFO L225 Difference]: With dead ends: 1772 [2021-06-01 19:13:43,700 INFO L226 Difference]: Without dead ends: 1752 [2021-06-01 19:13:43,701 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-01 19:13:43,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2021-06-01 19:13:43,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1021. [2021-06-01 19:13:43,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 3.9323529411764704) internal successors, (4011), 1020 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:43,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 4011 transitions. [2021-06-01 19:13:43,730 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 4011 transitions. Word has length 27 [2021-06-01 19:13:43,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:13:43,730 INFO L482 AbstractCegarLoop]: Abstraction has 1021 states and 4011 transitions. [2021-06-01 19:13:43,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:43,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 4011 transitions. [2021-06-01 19:13:43,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-01 19:13:43,732 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:13:43,732 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:13:43,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-01 19:13:43,732 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:13:43,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:13:43,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1548229740, now seen corresponding path program 4 times [2021-06-01 19:13:43,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:13:43,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961764905] [2021-06-01 19:13:43,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:13:43,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:13:43,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:13:43,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:13:43,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961764905] [2021-06-01 19:13:43,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961764905] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 19:13:43,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 19:13:43,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-01 19:13:43,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543533605] [2021-06-01 19:13:43,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-01 19:13:43,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:13:43,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-01 19:13:43,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-01 19:13:43,764 INFO L87 Difference]: Start difference. First operand 1021 states and 4011 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:43,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:13:43,814 INFO L93 Difference]: Finished difference Result 1137 states and 4479 transitions. [2021-06-01 19:13:43,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-01 19:13:43,815 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-01 19:13:43,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:13:43,820 INFO L225 Difference]: With dead ends: 1137 [2021-06-01 19:13:43,821 INFO L226 Difference]: Without dead ends: 1137 [2021-06-01 19:13:43,821 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-01 19:13:43,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-06-01 19:13:43,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 929. [2021-06-01 19:13:43,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 3.9364224137931036) internal successors, (3653), 928 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:43,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 3653 transitions. [2021-06-01 19:13:43,843 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 3653 transitions. Word has length 27 [2021-06-01 19:13:43,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:13:43,843 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 3653 transitions. [2021-06-01 19:13:43,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:43,843 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 3653 transitions. [2021-06-01 19:13:43,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-01 19:13:43,846 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:13:43,846 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:13:43,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-01 19:13:43,846 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:13:43,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:13:43,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1875081166, now seen corresponding path program 1 times [2021-06-01 19:13:43,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:13:43,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484491617] [2021-06-01 19:13:43,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:13:43,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:13:43,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:13:43,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:13:43,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484491617] [2021-06-01 19:13:43,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484491617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:43,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765869148] [2021-06-01 19:13:43,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:13:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:13:43,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-01 19:13:43,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:13:44,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:13:44,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765869148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:44,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:13:44,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-01 19:13:44,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460538737] [2021-06-01 19:13:44,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-01 19:13:44,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:13:44,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-01 19:13:44,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-01 19:13:44,118 INFO L87 Difference]: Start difference. First operand 929 states and 3653 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:44,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:13:44,233 INFO L93 Difference]: Finished difference Result 1388 states and 5211 transitions. [2021-06-01 19:13:44,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 19:13:44,233 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-01 19:13:44,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:13:44,240 INFO L225 Difference]: With dead ends: 1388 [2021-06-01 19:13:44,240 INFO L226 Difference]: Without dead ends: 1388 [2021-06-01 19:13:44,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-01 19:13:44,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-06-01 19:13:44,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1027. [2021-06-01 19:13:44,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 1026 states have (on average 3.8703703703703702) internal successors, (3971), 1026 states have internal predecessors, (3971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:44,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 3971 transitions. [2021-06-01 19:13:44,286 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 3971 transitions. Word has length 29 [2021-06-01 19:13:44,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:13:44,287 INFO L482 AbstractCegarLoop]: Abstraction has 1027 states and 3971 transitions. [2021-06-01 19:13:44,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:44,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 3971 transitions. [2021-06-01 19:13:44,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-01 19:13:44,289 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:13:44,289 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:13:44,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-06-01 19:13:44,506 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:13:44,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:13:44,506 INFO L82 PathProgramCache]: Analyzing trace with hash -775253682, now seen corresponding path program 2 times [2021-06-01 19:13:44,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:13:44,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86404878] [2021-06-01 19:13:44,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:13:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:13:44,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 19:13:44,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:13:44,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86404878] [2021-06-01 19:13:44,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86404878] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 19:13:44,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 19:13:44,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-01 19:13:44,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531919996] [2021-06-01 19:13:44,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-01 19:13:44,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:13:44,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-01 19:13:44,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-01 19:13:44,526 INFO L87 Difference]: Start difference. First operand 1027 states and 3971 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:44,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:13:44,587 INFO L93 Difference]: Finished difference Result 1113 states and 4299 transitions. [2021-06-01 19:13:44,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-01 19:13:44,587 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-01 19:13:44,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:13:44,592 INFO L225 Difference]: With dead ends: 1113 [2021-06-01 19:13:44,592 INFO L226 Difference]: Without dead ends: 1113 [2021-06-01 19:13:44,593 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-01 19:13:44,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-06-01 19:13:44,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 955. [2021-06-01 19:13:44,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 3.846960167714885) internal successors, (3670), 954 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:44,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 3670 transitions. [2021-06-01 19:13:44,615 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 3670 transitions. Word has length 29 [2021-06-01 19:13:44,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:13:44,615 INFO L482 AbstractCegarLoop]: Abstraction has 955 states and 3670 transitions. [2021-06-01 19:13:44,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:44,615 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 3670 transitions. [2021-06-01 19:13:44,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-01 19:13:44,618 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:13:44,618 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:13:44,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-01 19:13:44,618 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:13:44,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:13:44,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1393715960, now seen corresponding path program 1 times [2021-06-01 19:13:44,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:13:44,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025540968] [2021-06-01 19:13:44,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:13:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:13:44,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 19:13:44,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:13:44,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025540968] [2021-06-01 19:13:44,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025540968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:44,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966705523] [2021-06-01 19:13:44,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-01 19:13:44,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:13:44,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-01 19:13:44,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:13:44,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 19:13:44,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966705523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:44,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:13:44,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-01 19:13:44,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874430852] [2021-06-01 19:13:44,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 19:13:44,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:13:44,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 19:13:44,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-01 19:13:44,797 INFO L87 Difference]: Start difference. First operand 955 states and 3670 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:44,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:13:44,852 INFO L93 Difference]: Finished difference Result 1404 states and 5202 transitions. [2021-06-01 19:13:44,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-01 19:13:44,853 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 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 31 [2021-06-01 19:13:44,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:13:44,858 INFO L225 Difference]: With dead ends: 1404 [2021-06-01 19:13:44,858 INFO L226 Difference]: Without dead ends: 1404 [2021-06-01 19:13:44,859 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-01 19:13:44,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-06-01 19:13:44,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1036. [2021-06-01 19:13:44,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 3.7980676328502416) internal successors, (3931), 1035 states have internal predecessors, (3931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:44,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3931 transitions. [2021-06-01 19:13:44,882 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3931 transitions. Word has length 31 [2021-06-01 19:13:44,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:13:44,882 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 3931 transitions. [2021-06-01 19:13:44,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:44,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3931 transitions. [2021-06-01 19:13:44,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-01 19:13:44,884 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:13:44,884 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:13:45,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-01 19:13:45,103 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:13:45,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:13:45,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1732283312, now seen corresponding path program 2 times [2021-06-01 19:13:45,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:13:45,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562265818] [2021-06-01 19:13:45,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:13:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:13:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 19:13:45,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:13:45,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562265818] [2021-06-01 19:13:45,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562265818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:45,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834875675] [2021-06-01 19:13:45,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:13:45,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 19:13:45,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:13:45,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-01 19:13:45,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:13:45,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 19:13:45,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834875675] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 19:13:45,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-01 19:13:45,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-06-01 19:13:45,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263751772] [2021-06-01 19:13:45,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-01 19:13:45,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:13:45,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-01 19:13:45,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-01 19:13:45,255 INFO L87 Difference]: Start difference. First operand 1036 states and 3931 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 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) [2021-06-01 19:13:45,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:13:45,280 INFO L93 Difference]: Finished difference Result 1123 states and 4234 transitions. [2021-06-01 19:13:45,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-01 19:13:45,280 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 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 31 [2021-06-01 19:13:45,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:13:45,291 INFO L225 Difference]: With dead ends: 1123 [2021-06-01 19:13:45,291 INFO L226 Difference]: Without dead ends: 1063 [2021-06-01 19:13:45,291 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-01 19:13:45,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2021-06-01 19:13:45,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 916. [2021-06-01 19:13:45,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 3.814207650273224) internal successors, (3490), 915 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:45,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3490 transitions. [2021-06-01 19:13:45,310 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3490 transitions. Word has length 31 [2021-06-01 19:13:45,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:13:45,310 INFO L482 AbstractCegarLoop]: Abstraction has 916 states and 3490 transitions. [2021-06-01 19:13:45,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 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) [2021-06-01 19:13:45,310 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3490 transitions. [2021-06-01 19:13:45,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-01 19:13:45,312 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:13:45,312 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:13:45,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-01 19:13:45,526 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:13:45,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:13:45,526 INFO L82 PathProgramCache]: Analyzing trace with hash -237850558, now seen corresponding path program 1 times [2021-06-01 19:13:45,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:13:45,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146748199] [2021-06-01 19:13:45,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:13:45,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:13:45,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:13:45,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:13:45,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146748199] [2021-06-01 19:13:45,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146748199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:45,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010078306] [2021-06-01 19:13:45,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:13:45,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:13:45,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-01 19:13:45,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:13:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-01 19:13:45,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010078306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:45,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:13:45,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-06-01 19:13:45,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958838246] [2021-06-01 19:13:45,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 19:13:45,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:13:45,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 19:13:45,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-01 19:13:45,720 INFO L87 Difference]: Start difference. First operand 916 states and 3490 transitions. Second operand has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:45,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:13:45,793 INFO L93 Difference]: Finished difference Result 3683 states and 13665 transitions. [2021-06-01 19:13:45,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 19:13:45,794 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-01 19:13:45,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:13:45,803 INFO L225 Difference]: With dead ends: 3683 [2021-06-01 19:13:45,803 INFO L226 Difference]: Without dead ends: 3245 [2021-06-01 19:13:45,804 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-01 19:13:45,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3245 states. [2021-06-01 19:13:45,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3245 to 2020. [2021-06-01 19:13:45,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2019 states have (on average 3.8959881129271916) internal successors, (7866), 2019 states have internal predecessors, (7866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:45,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 7866 transitions. [2021-06-01 19:13:45,865 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 7866 transitions. Word has length 33 [2021-06-01 19:13:45,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:13:45,865 INFO L482 AbstractCegarLoop]: Abstraction has 2020 states and 7866 transitions. [2021-06-01 19:13:45,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:45,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 7866 transitions. [2021-06-01 19:13:45,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-01 19:13:45,870 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:13:45,870 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:13:46,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:13:46,085 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:13:46,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:13:46,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1992632042, now seen corresponding path program 2 times [2021-06-01 19:13:46,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:13:46,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493525007] [2021-06-01 19:13:46,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:13:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:13:46,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:13:46,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:13:46,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493525007] [2021-06-01 19:13:46,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493525007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:46,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417621172] [2021-06-01 19:13:46,162 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:13:46,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 19:13:46,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:13:46,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-01 19:13:46,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:13:46,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:13:46,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417621172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:46,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:13:46,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-01 19:13:46,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926685254] [2021-06-01 19:13:46,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-01 19:13:46,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:13:46,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-01 19:13:46,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-01 19:13:46,304 INFO L87 Difference]: Start difference. First operand 2020 states and 7866 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:46,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:13:46,381 INFO L93 Difference]: Finished difference Result 5705 states and 21618 transitions. [2021-06-01 19:13:46,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-01 19:13:46,381 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-01 19:13:46,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:13:46,397 INFO L225 Difference]: With dead ends: 5705 [2021-06-01 19:13:46,397 INFO L226 Difference]: Without dead ends: 5282 [2021-06-01 19:13:46,397 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-01 19:13:46,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5282 states. [2021-06-01 19:13:46,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5282 to 2797. [2021-06-01 19:13:46,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2797 states, 2796 states have (on average 3.987839771101574) internal successors, (11150), 2796 states have internal predecessors, (11150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:46,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2797 states to 2797 states and 11150 transitions. [2021-06-01 19:13:46,490 INFO L78 Accepts]: Start accepts. Automaton has 2797 states and 11150 transitions. Word has length 33 [2021-06-01 19:13:46,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:13:46,490 INFO L482 AbstractCegarLoop]: Abstraction has 2797 states and 11150 transitions. [2021-06-01 19:13:46,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:46,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2797 states and 11150 transitions. [2021-06-01 19:13:46,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-01 19:13:46,497 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:13:46,497 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:13:46,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-01 19:13:46,713 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:13:46,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:13:46,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1695022730, now seen corresponding path program 3 times [2021-06-01 19:13:46,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:13:46,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057838297] [2021-06-01 19:13:46,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:13:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:13:46,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:13:46,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:13:46,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057838297] [2021-06-01 19:13:46,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057838297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:46,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82356062] [2021-06-01 19:13:46,759 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:13:46,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 19:13:46,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:13:46,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-01 19:13:46,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:13:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 19:13:46,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82356062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:46,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:13:46,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-01 19:13:46,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74612120] [2021-06-01 19:13:46,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 19:13:46,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:13:46,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 19:13:46,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-01 19:13:46,889 INFO L87 Difference]: Start difference. First operand 2797 states and 11150 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:46,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:13:46,981 INFO L93 Difference]: Finished difference Result 5724 states and 21929 transitions. [2021-06-01 19:13:46,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 19:13:46,987 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-01 19:13:46,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:13:47,001 INFO L225 Difference]: With dead ends: 5724 [2021-06-01 19:13:47,002 INFO L226 Difference]: Without dead ends: 5132 [2021-06-01 19:13:47,002 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-01 19:13:47,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5132 states. [2021-06-01 19:13:47,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5132 to 2475. [2021-06-01 19:13:47,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2475 states, 2474 states have (on average 3.900565885206144) internal successors, (9650), 2474 states have internal predecessors, (9650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:47,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2475 states to 2475 states and 9650 transitions. [2021-06-01 19:13:47,075 INFO L78 Accepts]: Start accepts. Automaton has 2475 states and 9650 transitions. Word has length 33 [2021-06-01 19:13:47,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:13:47,075 INFO L482 AbstractCegarLoop]: Abstraction has 2475 states and 9650 transitions. [2021-06-01 19:13:47,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:47,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2475 states and 9650 transitions. [2021-06-01 19:13:47,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 19:13:47,080 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:13:47,080 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:13:47,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:13:47,301 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:13:47,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:13:47,301 INFO L82 PathProgramCache]: Analyzing trace with hash -304519936, now seen corresponding path program 4 times [2021-06-01 19:13:47,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:13:47,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066186778] [2021-06-01 19:13:47,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:13:47,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:13:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 19:13:47,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:13:47,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066186778] [2021-06-01 19:13:47,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066186778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:47,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946551192] [2021-06-01 19:13:47,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:13:47,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 19:13:47,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:13:47,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 19:13:47,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:13:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 19:13:47,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946551192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:47,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:13:47,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-01 19:13:47,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070093858] [2021-06-01 19:13:47,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 19:13:47,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:13:47,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 19:13:47,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-01 19:13:47,514 INFO L87 Difference]: Start difference. First operand 2475 states and 9650 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:47,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:13:47,833 INFO L93 Difference]: Finished difference Result 6143 states and 23236 transitions. [2021-06-01 19:13:47,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 19:13:47,834 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-01 19:13:47,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:13:47,849 INFO L225 Difference]: With dead ends: 6143 [2021-06-01 19:13:47,849 INFO L226 Difference]: Without dead ends: 6077 [2021-06-01 19:13:47,850 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 207.2ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-01 19:13:47,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6077 states. [2021-06-01 19:13:47,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6077 to 2842. [2021-06-01 19:13:47,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 3.9010911650827174) internal successors, (11083), 2841 states have internal predecessors, (11083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:47,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 11083 transitions. [2021-06-01 19:13:47,958 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 11083 transitions. Word has length 35 [2021-06-01 19:13:47,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:13:47,959 INFO L482 AbstractCegarLoop]: Abstraction has 2842 states and 11083 transitions. [2021-06-01 19:13:47,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:47,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 11083 transitions. [2021-06-01 19:13:47,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 19:13:47,965 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:13:47,965 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:13:48,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-01 19:13:48,179 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:13:48,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:13:48,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1524858692, now seen corresponding path program 5 times [2021-06-01 19:13:48,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:13:48,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162839759] [2021-06-01 19:13:48,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:13:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:13:48,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 19:13:48,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:13:48,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162839759] [2021-06-01 19:13:48,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162839759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:48,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242938439] [2021-06-01 19:13:48,208 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:13:48,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 19:13:48,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:13:48,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-01 19:13:48,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:13:48,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 19:13:48,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242938439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:48,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:13:48,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-01 19:13:48,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968365340] [2021-06-01 19:13:48,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 19:13:48,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:13:48,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 19:13:48,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-01 19:13:48,339 INFO L87 Difference]: Start difference. First operand 2842 states and 11083 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:48,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:13:48,568 INFO L93 Difference]: Finished difference Result 10702 states and 40797 transitions. [2021-06-01 19:13:48,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-01 19:13:48,568 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-01 19:13:48,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:13:48,594 INFO L225 Difference]: With dead ends: 10702 [2021-06-01 19:13:48,594 INFO L226 Difference]: Without dead ends: 10294 [2021-06-01 19:13:48,595 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 143.6ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-06-01 19:13:48,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10294 states. [2021-06-01 19:13:48,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10294 to 4458. [2021-06-01 19:13:48,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4458 states, 4457 states have (on average 4.070002243661656) internal successors, (18140), 4457 states have internal predecessors, (18140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:48,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4458 states to 4458 states and 18140 transitions. [2021-06-01 19:13:48,722 INFO L78 Accepts]: Start accepts. Automaton has 4458 states and 18140 transitions. Word has length 35 [2021-06-01 19:13:48,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:13:48,722 INFO L482 AbstractCegarLoop]: Abstraction has 4458 states and 18140 transitions. [2021-06-01 19:13:48,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:48,722 INFO L276 IsEmpty]: Start isEmpty. Operand 4458 states and 18140 transitions. [2021-06-01 19:13:48,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 19:13:48,735 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:13:48,735 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:13:48,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-01 19:13:48,953 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:13:48,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:13:48,954 INFO L82 PathProgramCache]: Analyzing trace with hash -355168440, now seen corresponding path program 6 times [2021-06-01 19:13:48,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:13:48,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435404334] [2021-06-01 19:13:48,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:13:48,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:13:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 19:13:49,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:13:49,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435404334] [2021-06-01 19:13:49,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435404334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:49,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893539093] [2021-06-01 19:13:49,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:13:49,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-01 19:13:49,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:13:49,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-01 19:13:49,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:13:49,151 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 19:13:49,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893539093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:49,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:13:49,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-01 19:13:49,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600003082] [2021-06-01 19:13:49,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 19:13:49,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:13:49,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 19:13:49,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-01 19:13:49,156 INFO L87 Difference]: Start difference. First operand 4458 states and 18140 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:49,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:13:49,593 INFO L93 Difference]: Finished difference Result 7423 states and 28628 transitions. [2021-06-01 19:13:49,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-01 19:13:49,594 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-01 19:13:49,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:13:49,613 INFO L225 Difference]: With dead ends: 7423 [2021-06-01 19:13:49,613 INFO L226 Difference]: Without dead ends: 7391 [2021-06-01 19:13:49,614 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 289.7ms TimeCoverageRelationStatistics Valid=301, Invalid=821, Unknown=0, NotChecked=0, Total=1122 [2021-06-01 19:13:49,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7391 states. [2021-06-01 19:13:49,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7391 to 4655. [2021-06-01 19:13:49,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 4.056940266437473) internal successors, (18881), 4654 states have internal predecessors, (18881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:49,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 18881 transitions. [2021-06-01 19:13:49,771 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 18881 transitions. Word has length 35 [2021-06-01 19:13:49,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:13:49,771 INFO L482 AbstractCegarLoop]: Abstraction has 4655 states and 18881 transitions. [2021-06-01 19:13:49,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:49,772 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 18881 transitions. [2021-06-01 19:13:49,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 19:13:49,783 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:13:49,784 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:13:49,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-01 19:13:49,989 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:13:49,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:13:49,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1441421880, now seen corresponding path program 7 times [2021-06-01 19:13:49,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:13:49,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523681019] [2021-06-01 19:13:49,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:13:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:13:50,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:13:50,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:13:50,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523681019] [2021-06-01 19:13:50,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523681019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:50,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808675862] [2021-06-01 19:13:50,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:13:50,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:13:50,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 19:13:50,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:13:50,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:13:50,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808675862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:50,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:13:50,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-01 19:13:50,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720549045] [2021-06-01 19:13:50,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 19:13:50,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:13:50,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 19:13:50,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-01 19:13:50,188 INFO L87 Difference]: Start difference. First operand 4655 states and 18881 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:50,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:13:50,667 INFO L93 Difference]: Finished difference Result 17746 states and 70993 transitions. [2021-06-01 19:13:50,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-01 19:13:50,668 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 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 35 [2021-06-01 19:13:50,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:13:50,721 INFO L225 Difference]: With dead ends: 17746 [2021-06-01 19:13:50,721 INFO L226 Difference]: Without dead ends: 17648 [2021-06-01 19:13:50,721 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 285.3ms TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2021-06-01 19:13:50,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17648 states. [2021-06-01 19:13:50,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17648 to 7394. [2021-06-01 19:13:50,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7394 states, 7393 states have (on average 4.241579872852698) internal successors, (31358), 7393 states have internal predecessors, (31358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:51,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7394 states to 7394 states and 31358 transitions. [2021-06-01 19:13:51,001 INFO L78 Accepts]: Start accepts. Automaton has 7394 states and 31358 transitions. Word has length 35 [2021-06-01 19:13:51,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:13:51,001 INFO L482 AbstractCegarLoop]: Abstraction has 7394 states and 31358 transitions. [2021-06-01 19:13:51,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:51,002 INFO L276 IsEmpty]: Start isEmpty. Operand 7394 states and 31358 transitions. [2021-06-01 19:13:51,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 19:13:51,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:13:51,018 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:13:51,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-01 19:13:51,235 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:13:51,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:13:51,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1322322868, now seen corresponding path program 8 times [2021-06-01 19:13:51,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:13:51,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389276437] [2021-06-01 19:13:51,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:13:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:13:51,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 19:13:51,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:13:51,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389276437] [2021-06-01 19:13:51,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389276437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:51,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476012272] [2021-06-01 19:13:51,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:13:51,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 19:13:51,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:13:51,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 19:13:51,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:13:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:13:51,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476012272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:51,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:13:51,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-01 19:13:51,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63558307] [2021-06-01 19:13:51,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 19:13:51,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:13:51,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 19:13:51,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-01 19:13:51,435 INFO L87 Difference]: Start difference. First operand 7394 states and 31358 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:51,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:13:51,885 INFO L93 Difference]: Finished difference Result 21973 states and 91914 transitions. [2021-06-01 19:13:51,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-01 19:13:51,886 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-01 19:13:51,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:13:52,031 INFO L225 Difference]: With dead ends: 21973 [2021-06-01 19:13:52,031 INFO L226 Difference]: Without dead ends: 21443 [2021-06-01 19:13:52,031 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 237.4ms TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-06-01 19:13:52,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21443 states. [2021-06-01 19:13:52,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21443 to 8728. [2021-06-01 19:13:52,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8728 states, 8727 states have (on average 4.463274894007104) internal successors, (38951), 8727 states have internal predecessors, (38951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:52,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8728 states to 8728 states and 38951 transitions. [2021-06-01 19:13:52,420 INFO L78 Accepts]: Start accepts. Automaton has 8728 states and 38951 transitions. Word has length 35 [2021-06-01 19:13:52,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:13:52,420 INFO L482 AbstractCegarLoop]: Abstraction has 8728 states and 38951 transitions. [2021-06-01 19:13:52,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:52,421 INFO L276 IsEmpty]: Start isEmpty. Operand 8728 states and 38951 transitions. [2021-06-01 19:13:52,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 19:13:52,441 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:13:52,441 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:13:52,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:13:52,657 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:13:52,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:13:52,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1712284596, now seen corresponding path program 9 times [2021-06-01 19:13:52,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:13:52,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515493283] [2021-06-01 19:13:52,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:13:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:13:52,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 19:13:52,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:13:52,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515493283] [2021-06-01 19:13:52,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515493283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:52,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574607700] [2021-06-01 19:13:52,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:13:52,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 19:13:52,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:13:52,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-01 19:13:52,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:13:52,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:13:52,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574607700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:52,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:13:52,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-01 19:13:52,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356730500] [2021-06-01 19:13:52,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 19:13:52,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:13:52,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 19:13:52,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-01 19:13:52,913 INFO L87 Difference]: Start difference. First operand 8728 states and 38951 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:53,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:13:53,486 INFO L93 Difference]: Finished difference Result 15939 states and 66344 transitions. [2021-06-01 19:13:53,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-01 19:13:53,486 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-01 19:13:53,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:13:53,524 INFO L225 Difference]: With dead ends: 15939 [2021-06-01 19:13:53,524 INFO L226 Difference]: Without dead ends: 15563 [2021-06-01 19:13:53,524 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 399.6ms TimeCoverageRelationStatistics Valid=407, Invalid=925, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 19:13:53,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15563 states. [2021-06-01 19:13:53,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15563 to 9935. [2021-06-01 19:13:53,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9935 states, 9934 states have (on average 4.418260519428227) internal successors, (43891), 9934 states have internal predecessors, (43891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:53,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9935 states to 9935 states and 43891 transitions. [2021-06-01 19:13:53,776 INFO L78 Accepts]: Start accepts. Automaton has 9935 states and 43891 transitions. Word has length 35 [2021-06-01 19:13:53,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:13:53,776 INFO L482 AbstractCegarLoop]: Abstraction has 9935 states and 43891 transitions. [2021-06-01 19:13:53,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:53,776 INFO L276 IsEmpty]: Start isEmpty. Operand 9935 states and 43891 transitions. [2021-06-01 19:13:53,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 19:13:53,799 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:13:53,799 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:13:54,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:13:54,018 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:13:54,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:13:54,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1290484416, now seen corresponding path program 10 times [2021-06-01 19:13:54,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:13:54,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056199981] [2021-06-01 19:13:54,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:13:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:13:54,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 19:13:54,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:13:54,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056199981] [2021-06-01 19:13:54,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056199981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:54,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506646450] [2021-06-01 19:13:54,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:13:54,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 19:13:54,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:13:54,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-01 19:13:54,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:13:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:13:54,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506646450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:54,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:13:54,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-06-01 19:13:54,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72850118] [2021-06-01 19:13:54,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-01 19:13:54,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:13:54,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-01 19:13:54,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-01 19:13:54,230 INFO L87 Difference]: Start difference. First operand 9935 states and 43891 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:54,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:13:54,470 INFO L93 Difference]: Finished difference Result 17650 states and 76018 transitions. [2021-06-01 19:13:54,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 19:13:54,471 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 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 35 [2021-06-01 19:13:54,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:13:54,517 INFO L225 Difference]: With dead ends: 17650 [2021-06-01 19:13:54,518 INFO L226 Difference]: Without dead ends: 17578 [2021-06-01 19:13:54,518 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 173.2ms TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2021-06-01 19:13:54,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17578 states. [2021-06-01 19:13:54,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17578 to 12387. [2021-06-01 19:13:54,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12387 states, 12386 states have (on average 4.56353948005813) internal successors, (56524), 12386 states have internal predecessors, (56524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:54,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12387 states to 12387 states and 56524 transitions. [2021-06-01 19:13:54,932 INFO L78 Accepts]: Start accepts. Automaton has 12387 states and 56524 transitions. Word has length 35 [2021-06-01 19:13:54,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:13:54,932 INFO L482 AbstractCegarLoop]: Abstraction has 12387 states and 56524 transitions. [2021-06-01 19:13:54,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:54,933 INFO L276 IsEmpty]: Start isEmpty. Operand 12387 states and 56524 transitions. [2021-06-01 19:13:54,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 19:13:54,960 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:13:54,960 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:13:55,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-01 19:13:55,166 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:13:55,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:13:55,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1130396630, now seen corresponding path program 11 times [2021-06-01 19:13:55,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:13:55,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271614157] [2021-06-01 19:13:55,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:13:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:13:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-01 19:13:55,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:13:55,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271614157] [2021-06-01 19:13:55,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271614157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:55,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653771062] [2021-06-01 19:13:55,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:13:55,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 19:13:55,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:13:55,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-01 19:13:55,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:13:55,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 19:13:55,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653771062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:55,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:13:55,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-01 19:13:55,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825007884] [2021-06-01 19:13:55,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 19:13:55,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:13:55,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 19:13:55,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-01 19:13:55,306 INFO L87 Difference]: Start difference. First operand 12387 states and 56524 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:55,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:13:55,935 INFO L93 Difference]: Finished difference Result 47667 states and 212153 transitions. [2021-06-01 19:13:55,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-01 19:13:55,936 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-01 19:13:55,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:13:56,076 INFO L225 Difference]: With dead ends: 47667 [2021-06-01 19:13:56,076 INFO L226 Difference]: Without dead ends: 46072 [2021-06-01 19:13:56,077 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 185.4ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-01 19:13:56,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46072 states. [2021-06-01 19:13:56,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46072 to 27040. [2021-06-01 19:13:56,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27040 states, 27039 states have (on average 4.81733791930175) internal successors, (130256), 27039 states have internal predecessors, (130256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:57,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27040 states to 27040 states and 130256 transitions. [2021-06-01 19:13:57,092 INFO L78 Accepts]: Start accepts. Automaton has 27040 states and 130256 transitions. Word has length 37 [2021-06-01 19:13:57,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:13:57,092 INFO L482 AbstractCegarLoop]: Abstraction has 27040 states and 130256 transitions. [2021-06-01 19:13:57,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:57,092 INFO L276 IsEmpty]: Start isEmpty. Operand 27040 states and 130256 transitions. [2021-06-01 19:13:57,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 19:13:57,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:13:57,161 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:13:57,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:13:57,361 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:13:57,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:13:57,362 INFO L82 PathProgramCache]: Analyzing trace with hash 483536730, now seen corresponding path program 12 times [2021-06-01 19:13:57,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:13:57,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166595016] [2021-06-01 19:13:57,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:13:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:13:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-01 19:13:57,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:13:57,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166595016] [2021-06-01 19:13:57,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166595016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:57,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851131168] [2021-06-01 19:13:57,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:13:57,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-01 19:13:57,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:13:57,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 19:13:57,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:13:57,709 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 19:13:57,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851131168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:57,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:13:57,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-01 19:13:57,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030154921] [2021-06-01 19:13:57,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 19:13:57,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:13:57,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 19:13:57,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-01 19:13:57,710 INFO L87 Difference]: Start difference. First operand 27040 states and 130256 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:58,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:13:58,246 INFO L93 Difference]: Finished difference Result 41877 states and 190705 transitions. [2021-06-01 19:13:58,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 19:13:58,246 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-01 19:13:58,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:13:58,380 INFO L225 Difference]: With dead ends: 41877 [2021-06-01 19:13:58,381 INFO L226 Difference]: Without dead ends: 41385 [2021-06-01 19:13:58,381 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 253.4ms TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-06-01 19:13:58,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41385 states. [2021-06-01 19:13:59,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41385 to 26074. [2021-06-01 19:13:59,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26074 states, 26073 states have (on average 4.745944080082844) internal successors, (123741), 26073 states have internal predecessors, (123741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:59,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26074 states to 26074 states and 123741 transitions. [2021-06-01 19:13:59,252 INFO L78 Accepts]: Start accepts. Automaton has 26074 states and 123741 transitions. Word has length 37 [2021-06-01 19:13:59,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:13:59,252 INFO L482 AbstractCegarLoop]: Abstraction has 26074 states and 123741 transitions. [2021-06-01 19:13:59,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:13:59,253 INFO L276 IsEmpty]: Start isEmpty. Operand 26074 states and 123741 transitions. [2021-06-01 19:13:59,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 19:13:59,326 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:13:59,326 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:13:59,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-01 19:13:59,527 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:13:59,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:13:59,527 INFO L82 PathProgramCache]: Analyzing trace with hash 2021180106, now seen corresponding path program 13 times [2021-06-01 19:13:59,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:13:59,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063514321] [2021-06-01 19:13:59,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:13:59,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:13:59,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-01 19:13:59,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:13:59,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063514321] [2021-06-01 19:13:59,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063514321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:59,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511440036] [2021-06-01 19:13:59,560 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:13:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:13:59,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 19:13:59,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:13:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 19:13:59,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511440036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:13:59,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:13:59,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-01 19:13:59,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467822531] [2021-06-01 19:13:59,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 19:13:59,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:13:59,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 19:13:59,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-01 19:13:59,683 INFO L87 Difference]: Start difference. First operand 26074 states and 123741 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:00,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:14:00,426 INFO L93 Difference]: Finished difference Result 55329 states and 256839 transitions. [2021-06-01 19:14:00,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-01 19:14:00,427 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-01 19:14:00,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:14:00,617 INFO L225 Difference]: With dead ends: 55329 [2021-06-01 19:14:00,617 INFO L226 Difference]: Without dead ends: 54965 [2021-06-01 19:14:00,617 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 319.6ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-01 19:14:00,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54965 states. [2021-06-01 19:14:01,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54965 to 37282. [2021-06-01 19:14:01,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37282 states, 37281 states have (on average 4.838925994474397) internal successors, (180400), 37281 states have internal predecessors, (180400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:01,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37282 states to 37282 states and 180400 transitions. [2021-06-01 19:14:01,983 INFO L78 Accepts]: Start accepts. Automaton has 37282 states and 180400 transitions. Word has length 37 [2021-06-01 19:14:01,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:14:01,983 INFO L482 AbstractCegarLoop]: Abstraction has 37282 states and 180400 transitions. [2021-06-01 19:14:01,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:01,983 INFO L276 IsEmpty]: Start isEmpty. Operand 37282 states and 180400 transitions. [2021-06-01 19:14:02,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 19:14:02,088 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:14:02,089 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:14:02,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:14:02,289 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:14:02,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:14:02,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1258701498, now seen corresponding path program 14 times [2021-06-01 19:14:02,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:14:02,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460337640] [2021-06-01 19:14:02,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:14:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:14:02,311 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-01 19:14:02,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:14:02,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460337640] [2021-06-01 19:14:02,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460337640] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 19:14:02,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 19:14:02,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-01 19:14:02,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531018592] [2021-06-01 19:14:02,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-01 19:14:02,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:14:02,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-01 19:14:02,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-01 19:14:02,312 INFO L87 Difference]: Start difference. First operand 37282 states and 180400 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:02,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:14:02,555 INFO L93 Difference]: Finished difference Result 36224 states and 175246 transitions. [2021-06-01 19:14:02,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-01 19:14:02,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-01 19:14:02,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:14:02,689 INFO L225 Difference]: With dead ends: 36224 [2021-06-01 19:14:02,689 INFO L226 Difference]: Without dead ends: 36156 [2021-06-01 19:14:02,690 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-01 19:14:02,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36156 states. [2021-06-01 19:14:03,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36156 to 36036. [2021-06-01 19:14:03,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36036 states, 36035 states have (on average 4.84787012626613) internal successors, (174693), 36035 states have internal predecessors, (174693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:03,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36036 states to 36036 states and 174693 transitions. [2021-06-01 19:14:03,847 INFO L78 Accepts]: Start accepts. Automaton has 36036 states and 174693 transitions. Word has length 37 [2021-06-01 19:14:03,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:14:03,847 INFO L482 AbstractCegarLoop]: Abstraction has 36036 states and 174693 transitions. [2021-06-01 19:14:03,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:03,847 INFO L276 IsEmpty]: Start isEmpty. Operand 36036 states and 174693 transitions. [2021-06-01 19:14:03,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-01 19:14:03,926 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:14:03,927 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:14:03,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-01 19:14:03,927 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:14:03,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:14:03,927 INFO L82 PathProgramCache]: Analyzing trace with hash -2111156776, now seen corresponding path program 15 times [2021-06-01 19:14:03,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:14:03,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153781072] [2021-06-01 19:14:03,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:14:03,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:14:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-01 19:14:03,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:14:03,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153781072] [2021-06-01 19:14:03,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153781072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:14:03,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025901236] [2021-06-01 19:14:03,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:14:03,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 19:14:03,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:14:03,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 19:14:03,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:14:04,052 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-01 19:14:04,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025901236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:14:04,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:14:04,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 10 [2021-06-01 19:14:04,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024443230] [2021-06-01 19:14:04,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-01 19:14:04,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:14:04,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-01 19:14:04,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-01 19:14:04,053 INFO L87 Difference]: Start difference. First operand 36036 states and 174693 transitions. Second operand has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:04,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:14:04,731 INFO L93 Difference]: Finished difference Result 51586 states and 247229 transitions. [2021-06-01 19:14:04,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 19:14:04,732 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-01 19:14:04,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:14:04,916 INFO L225 Difference]: With dead ends: 51586 [2021-06-01 19:14:04,917 INFO L226 Difference]: Without dead ends: 50003 [2021-06-01 19:14:04,917 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-06-01 19:14:04,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50003 states. [2021-06-01 19:14:05,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50003 to 45050. [2021-06-01 19:14:05,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45050 states, 45049 states have (on average 4.900574929521188) internal successors, (220766), 45049 states have internal predecessors, (220766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:06,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45050 states to 45050 states and 220766 transitions. [2021-06-01 19:14:06,383 INFO L78 Accepts]: Start accepts. Automaton has 45050 states and 220766 transitions. Word has length 39 [2021-06-01 19:14:06,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:14:06,383 INFO L482 AbstractCegarLoop]: Abstraction has 45050 states and 220766 transitions. [2021-06-01 19:14:06,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:06,384 INFO L276 IsEmpty]: Start isEmpty. Operand 45050 states and 220766 transitions. [2021-06-01 19:14:06,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-01 19:14:06,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:14:06,488 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:14:06,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-01 19:14:06,690 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:14:06,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:14:06,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1915964464, now seen corresponding path program 16 times [2021-06-01 19:14:06,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:14:06,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643207649] [2021-06-01 19:14:06,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:14:06,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:14:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-01 19:14:06,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:14:06,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643207649] [2021-06-01 19:14:06,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643207649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:14:06,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800793886] [2021-06-01 19:14:06,747 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:14:06,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 19:14:06,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:14:06,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 19:14:06,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:14:06,868 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-01 19:14:06,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800793886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:14:06,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:14:06,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-01 19:14:06,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413847426] [2021-06-01 19:14:06,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 19:14:06,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:14:06,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 19:14:06,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-01 19:14:06,870 INFO L87 Difference]: Start difference. First operand 45050 states and 220766 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:07,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:14:07,746 INFO L93 Difference]: Finished difference Result 63166 states and 300566 transitions. [2021-06-01 19:14:07,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 19:14:07,746 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-01 19:14:07,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:14:07,976 INFO L225 Difference]: With dead ends: 63166 [2021-06-01 19:14:07,976 INFO L226 Difference]: Without dead ends: 63106 [2021-06-01 19:14:07,976 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 188.1ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-01 19:14:08,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63106 states. [2021-06-01 19:14:08,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63106 to 43451. [2021-06-01 19:14:09,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43451 states, 43450 states have (on average 4.851162255466053) internal successors, (210783), 43450 states have internal predecessors, (210783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:09,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43451 states to 43451 states and 210783 transitions. [2021-06-01 19:14:09,183 INFO L78 Accepts]: Start accepts. Automaton has 43451 states and 210783 transitions. Word has length 39 [2021-06-01 19:14:09,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:14:09,183 INFO L482 AbstractCegarLoop]: Abstraction has 43451 states and 210783 transitions. [2021-06-01 19:14:09,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:09,183 INFO L276 IsEmpty]: Start isEmpty. Operand 43451 states and 210783 transitions. [2021-06-01 19:14:09,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-01 19:14:09,576 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:14:09,577 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:14:09,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-01 19:14:09,793 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:14:09,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:14:09,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1538179198, now seen corresponding path program 17 times [2021-06-01 19:14:09,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:14:09,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413173147] [2021-06-01 19:14:09,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:14:09,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:14:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-01 19:14:09,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:14:09,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413173147] [2021-06-01 19:14:09,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413173147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:14:09,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052622460] [2021-06-01 19:14:09,851 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:14:09,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-01 19:14:09,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:14:09,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-01 19:14:09,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:14:10,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-01 19:14:10,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052622460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:14:10,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:14:10,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-01 19:14:10,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739659124] [2021-06-01 19:14:10,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 19:14:10,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:14:10,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 19:14:10,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-01 19:14:10,027 INFO L87 Difference]: Start difference. First operand 43451 states and 210783 transitions. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 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) [2021-06-01 19:14:10,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:14:10,437 INFO L93 Difference]: Finished difference Result 49744 states and 234920 transitions. [2021-06-01 19:14:10,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-01 19:14:10,437 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 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 41 [2021-06-01 19:14:10,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:14:10,627 INFO L225 Difference]: With dead ends: 49744 [2021-06-01 19:14:10,627 INFO L226 Difference]: Without dead ends: 49407 [2021-06-01 19:14:10,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-01 19:14:10,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49407 states. [2021-06-01 19:14:11,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49407 to 46277. [2021-06-01 19:14:11,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46277 states, 46276 states have (on average 4.791684674561328) internal successors, (221740), 46276 states have internal predecessors, (221740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:12,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46277 states to 46277 states and 221740 transitions. [2021-06-01 19:14:12,196 INFO L78 Accepts]: Start accepts. Automaton has 46277 states and 221740 transitions. Word has length 41 [2021-06-01 19:14:12,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:14:12,196 INFO L482 AbstractCegarLoop]: Abstraction has 46277 states and 221740 transitions. [2021-06-01 19:14:12,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 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) [2021-06-01 19:14:12,196 INFO L276 IsEmpty]: Start isEmpty. Operand 46277 states and 221740 transitions. [2021-06-01 19:14:12,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-01 19:14:12,326 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:14:12,326 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:14:12,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-01 19:14:12,529 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:14:12,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:14:12,529 INFO L82 PathProgramCache]: Analyzing trace with hash 591667582, now seen corresponding path program 18 times [2021-06-01 19:14:12,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:14:12,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155467648] [2021-06-01 19:14:12,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:14:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:14:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:14:12,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:14:12,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155467648] [2021-06-01 19:14:12,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155467648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:14:12,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550472680] [2021-06-01 19:14:12,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:14:12,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-01 19:14:12,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:14:12,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-01 19:14:12,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:14:12,723 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-01 19:14:12,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550472680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:14:12,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:14:12,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-06-01 19:14:12,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073386981] [2021-06-01 19:14:12,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 19:14:12,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:14:12,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 19:14:12,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-01 19:14:12,725 INFO L87 Difference]: Start difference. First operand 46277 states and 221740 transitions. Second operand has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:13,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:14:13,161 INFO L93 Difference]: Finished difference Result 60825 states and 280291 transitions. [2021-06-01 19:14:13,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 19:14:13,161 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-01 19:14:13,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:14:13,365 INFO L225 Difference]: With dead ends: 60825 [2021-06-01 19:14:13,365 INFO L226 Difference]: Without dead ends: 59259 [2021-06-01 19:14:13,366 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-01 19:14:13,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59259 states. [2021-06-01 19:14:14,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59259 to 52848. [2021-06-01 19:14:14,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52848 states, 52847 states have (on average 4.702499668855375) internal successors, (248513), 52847 states have internal predecessors, (248513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:15,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52848 states to 52848 states and 248513 transitions. [2021-06-01 19:14:15,022 INFO L78 Accepts]: Start accepts. Automaton has 52848 states and 248513 transitions. Word has length 41 [2021-06-01 19:14:15,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:14:15,023 INFO L482 AbstractCegarLoop]: Abstraction has 52848 states and 248513 transitions. [2021-06-01 19:14:15,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:15,023 INFO L276 IsEmpty]: Start isEmpty. Operand 52848 states and 248513 transitions. [2021-06-01 19:14:15,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-01 19:14:15,165 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:14:15,165 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:14:15,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-01 19:14:15,369 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:14:15,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:14:15,369 INFO L82 PathProgramCache]: Analyzing trace with hash -261664514, now seen corresponding path program 19 times [2021-06-01 19:14:15,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:14:15,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330919071] [2021-06-01 19:14:15,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:14:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:14:15,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:14:15,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:14:15,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330919071] [2021-06-01 19:14:15,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330919071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:14:15,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119157495] [2021-06-01 19:14:15,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:14:15,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:14:15,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-01 19:14:15,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:14:15,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 19:14:15,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119157495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:14:15,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:14:15,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 19:14:15,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283772578] [2021-06-01 19:14:15,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 19:14:15,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:14:15,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 19:14:15,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-01 19:14:15,601 INFO L87 Difference]: Start difference. First operand 52848 states and 248513 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:16,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:14:16,453 INFO L93 Difference]: Finished difference Result 64976 states and 299967 transitions. [2021-06-01 19:14:16,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-01 19:14:16,453 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-01 19:14:16,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:14:16,685 INFO L225 Difference]: With dead ends: 64976 [2021-06-01 19:14:16,685 INFO L226 Difference]: Without dead ends: 64453 [2021-06-01 19:14:16,685 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 123.2ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-01 19:14:16,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64453 states. [2021-06-01 19:14:17,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64453 to 58787. [2021-06-01 19:14:17,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58787 states, 58786 states have (on average 4.700591977681761) internal successors, (276329), 58786 states have internal predecessors, (276329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:18,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58787 states to 58787 states and 276329 transitions. [2021-06-01 19:14:18,150 INFO L78 Accepts]: Start accepts. Automaton has 58787 states and 276329 transitions. Word has length 41 [2021-06-01 19:14:18,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:14:18,150 INFO L482 AbstractCegarLoop]: Abstraction has 58787 states and 276329 transitions. [2021-06-01 19:14:18,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:18,150 INFO L276 IsEmpty]: Start isEmpty. Operand 58787 states and 276329 transitions. [2021-06-01 19:14:18,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-01 19:14:18,301 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:14:18,301 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:14:18,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:14:18,502 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:14:18,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:14:18,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1787747650, now seen corresponding path program 20 times [2021-06-01 19:14:18,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:14:18,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030143632] [2021-06-01 19:14:18,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:14:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:14:18,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:14:18,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:14:18,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030143632] [2021-06-01 19:14:18,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030143632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:14:18,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674227938] [2021-06-01 19:14:18,556 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:14:18,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 19:14:18,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:14:18,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-01 19:14:18,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:14:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 19:14:18,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674227938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:14:18,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:14:18,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-01 19:14:18,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140550811] [2021-06-01 19:14:18,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 19:14:18,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:14:18,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 19:14:18,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-01 19:14:18,683 INFO L87 Difference]: Start difference. First operand 58787 states and 276329 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:19,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:14:19,691 INFO L93 Difference]: Finished difference Result 93655 states and 432022 transitions. [2021-06-01 19:14:19,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 19:14:19,692 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-01 19:14:19,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:14:20,010 INFO L225 Difference]: With dead ends: 93655 [2021-06-01 19:14:20,010 INFO L226 Difference]: Without dead ends: 91110 [2021-06-01 19:14:20,010 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-01 19:14:20,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91110 states. [2021-06-01 19:14:22,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91110 to 76620. [2021-06-01 19:14:22,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76620 states, 76619 states have (on average 4.695597697699005) internal successors, (359772), 76619 states have internal predecessors, (359772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:22,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76620 states to 76620 states and 359772 transitions. [2021-06-01 19:14:22,662 INFO L78 Accepts]: Start accepts. Automaton has 76620 states and 359772 transitions. Word has length 41 [2021-06-01 19:14:22,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:14:22,662 INFO L482 AbstractCegarLoop]: Abstraction has 76620 states and 359772 transitions. [2021-06-01 19:14:22,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:22,662 INFO L276 IsEmpty]: Start isEmpty. Operand 76620 states and 359772 transitions. [2021-06-01 19:14:23,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-01 19:14:23,304 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:14:23,304 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:14:23,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:14:23,521 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:14:23,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:14:23,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1211267282, now seen corresponding path program 21 times [2021-06-01 19:14:23,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:14:23,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232188042] [2021-06-01 19:14:23,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:14:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:14:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:14:23,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:14:23,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232188042] [2021-06-01 19:14:23,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232188042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:14:23,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558688439] [2021-06-01 19:14:23,574 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:14:23,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-01 19:14:23,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:14:23,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-01 19:14:23,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:14:23,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:14:23,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558688439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:14:23,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:14:23,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-01 19:14:23,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466934739] [2021-06-01 19:14:23,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 19:14:23,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:14:23,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 19:14:23,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-01 19:14:23,708 INFO L87 Difference]: Start difference. First operand 76620 states and 359772 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:25,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:14:25,275 INFO L93 Difference]: Finished difference Result 163014 states and 750713 transitions. [2021-06-01 19:14:25,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 19:14:25,275 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-01 19:14:25,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:14:25,866 INFO L225 Difference]: With dead ends: 163014 [2021-06-01 19:14:25,866 INFO L226 Difference]: Without dead ends: 159428 [2021-06-01 19:14:25,866 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-01 19:14:26,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159428 states. [2021-06-01 19:14:29,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159428 to 126993. [2021-06-01 19:14:29,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126993 states, 126992 states have (on average 4.747724266095502) internal successors, (602923), 126992 states have internal predecessors, (602923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:30,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126993 states to 126993 states and 602923 transitions. [2021-06-01 19:14:30,945 INFO L78 Accepts]: Start accepts. Automaton has 126993 states and 602923 transitions. Word has length 41 [2021-06-01 19:14:30,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:14:30,945 INFO L482 AbstractCegarLoop]: Abstraction has 126993 states and 602923 transitions. [2021-06-01 19:14:30,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:30,945 INFO L276 IsEmpty]: Start isEmpty. Operand 126993 states and 602923 transitions. [2021-06-01 19:14:31,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-01 19:14:31,282 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:14:31,282 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:14:31,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-01 19:14:31,482 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:14:31,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:14:31,483 INFO L82 PathProgramCache]: Analyzing trace with hash 603954758, now seen corresponding path program 22 times [2021-06-01 19:14:31,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:14:31,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671182916] [2021-06-01 19:14:31,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:14:31,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:14:31,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:14:31,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:14:31,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671182916] [2021-06-01 19:14:31,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671182916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:14:31,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135210205] [2021-06-01 19:14:31,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:14:31,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 19:14:31,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:14:31,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-01 19:14:31,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:14:31,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 19:14:31,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135210205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:14:31,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:14:31,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-01 19:14:31,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149478255] [2021-06-01 19:14:31,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 19:14:31,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:14:31,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 19:14:31,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-01 19:14:31,682 INFO L87 Difference]: Start difference. First operand 126993 states and 602923 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:33,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:14:33,321 INFO L93 Difference]: Finished difference Result 156598 states and 736161 transitions. [2021-06-01 19:14:33,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 19:14:33,322 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-01 19:14:33,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:14:33,973 INFO L225 Difference]: With dead ends: 156598 [2021-06-01 19:14:33,973 INFO L226 Difference]: Without dead ends: 156198 [2021-06-01 19:14:33,973 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-01 19:14:34,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156198 states. [2021-06-01 19:14:37,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156198 to 123212. [2021-06-01 19:14:37,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123212 states, 123211 states have (on average 4.758925745266251) internal successors, (586352), 123211 states have internal predecessors, (586352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:38,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123212 states to 123212 states and 586352 transitions. [2021-06-01 19:14:38,916 INFO L78 Accepts]: Start accepts. Automaton has 123212 states and 586352 transitions. Word has length 41 [2021-06-01 19:14:38,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:14:38,916 INFO L482 AbstractCegarLoop]: Abstraction has 123212 states and 586352 transitions. [2021-06-01 19:14:38,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:38,916 INFO L276 IsEmpty]: Start isEmpty. Operand 123212 states and 586352 transitions. [2021-06-01 19:14:39,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-01 19:14:39,335 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:14:39,335 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:14:39,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:14:39,537 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:14:39,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:14:39,537 INFO L82 PathProgramCache]: Analyzing trace with hash 295403914, now seen corresponding path program 23 times [2021-06-01 19:14:39,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:14:39,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608904547] [2021-06-01 19:14:39,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:14:39,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:14:39,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:14:39,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:14:39,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608904547] [2021-06-01 19:14:39,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608904547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:14:39,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343619891] [2021-06-01 19:14:39,603 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:14:39,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-01 19:14:39,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:14:39,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-01 19:14:39,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:14:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 19:14:39,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343619891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:14:39,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:14:39,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-01 19:14:39,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080693778] [2021-06-01 19:14:39,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-01 19:14:39,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:14:39,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-01 19:14:39,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-01 19:14:39,781 INFO L87 Difference]: Start difference. First operand 123212 states and 586352 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:41,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:14:41,505 INFO L93 Difference]: Finished difference Result 166888 states and 780472 transitions. [2021-06-01 19:14:41,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 19:14:41,505 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-01 19:14:41,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:14:42,108 INFO L225 Difference]: With dead ends: 166888 [2021-06-01 19:14:42,109 INFO L226 Difference]: Without dead ends: 163861 [2021-06-01 19:14:42,109 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-01 19:14:42,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163861 states. [2021-06-01 19:14:45,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163861 to 96217. [2021-06-01 19:14:45,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96217 states, 96216 states have (on average 4.736894071672071) internal successors, (455765), 96216 states have internal predecessors, (455765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:46,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96217 states to 96217 states and 455765 transitions. [2021-06-01 19:14:46,143 INFO L78 Accepts]: Start accepts. Automaton has 96217 states and 455765 transitions. Word has length 41 [2021-06-01 19:14:46,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:14:46,143 INFO L482 AbstractCegarLoop]: Abstraction has 96217 states and 455765 transitions. [2021-06-01 19:14:46,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:46,143 INFO L276 IsEmpty]: Start isEmpty. Operand 96217 states and 455765 transitions. [2021-06-01 19:14:46,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-01 19:14:46,384 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:14:46,384 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:14:46,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-01 19:14:46,585 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:14:46,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:14:46,586 INFO L82 PathProgramCache]: Analyzing trace with hash -904179714, now seen corresponding path program 24 times [2021-06-01 19:14:46,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:14:46,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068419395] [2021-06-01 19:14:46,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:14:46,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:14:46,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:14:46,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:14:46,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068419395] [2021-06-01 19:14:46,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068419395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:14:46,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13938721] [2021-06-01 19:14:46,636 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:14:46,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-01 19:14:46,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:14:46,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-01 19:14:46,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:14:46,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:14:46,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13938721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:14:46,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:14:46,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-01 19:14:46,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258132675] [2021-06-01 19:14:46,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 19:14:46,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:14:46,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 19:14:46,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-01 19:14:46,785 INFO L87 Difference]: Start difference. First operand 96217 states and 455765 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:48,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:14:48,035 INFO L93 Difference]: Finished difference Result 118313 states and 543700 transitions. [2021-06-01 19:14:48,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 19:14:48,035 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-01 19:14:48,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:14:48,485 INFO L225 Difference]: With dead ends: 118313 [2021-06-01 19:14:48,486 INFO L226 Difference]: Without dead ends: 118079 [2021-06-01 19:14:48,486 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-01 19:14:48,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118079 states. [2021-06-01 19:14:51,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118079 to 101978. [2021-06-01 19:14:51,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101978 states, 101977 states have (on average 4.717151906802514) internal successors, (481041), 101977 states have internal predecessors, (481041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:51,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101978 states to 101978 states and 481041 transitions. [2021-06-01 19:14:51,601 INFO L78 Accepts]: Start accepts. Automaton has 101978 states and 481041 transitions. Word has length 41 [2021-06-01 19:14:51,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:14:51,601 INFO L482 AbstractCegarLoop]: Abstraction has 101978 states and 481041 transitions. [2021-06-01 19:14:51,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:51,601 INFO L276 IsEmpty]: Start isEmpty. Operand 101978 states and 481041 transitions. [2021-06-01 19:14:52,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-01 19:14:52,705 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:14:52,705 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:14:52,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-01 19:14:52,935 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:14:52,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:14:52,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1636006098, now seen corresponding path program 25 times [2021-06-01 19:14:52,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:14:52,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078482040] [2021-06-01 19:14:52,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:14:52,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:14:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:14:53,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:14:53,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078482040] [2021-06-01 19:14:53,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078482040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:14:53,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642006243] [2021-06-01 19:14:53,042 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:14:53,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:14:53,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-01 19:14:53,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:14:53,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:14:53,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642006243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:14:53,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:14:53,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-01 19:14:53,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394740452] [2021-06-01 19:14:53,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 19:14:53,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:14:53,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 19:14:53,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-06-01 19:14:53,241 INFO L87 Difference]: Start difference. First operand 101978 states and 481041 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:54,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:14:54,223 INFO L93 Difference]: Finished difference Result 131320 states and 606130 transitions. [2021-06-01 19:14:54,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-01 19:14:54,223 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-01 19:14:54,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:14:54,735 INFO L225 Difference]: With dead ends: 131320 [2021-06-01 19:14:54,735 INFO L226 Difference]: Without dead ends: 130644 [2021-06-01 19:14:54,736 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 135.2ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-06-01 19:14:55,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130644 states. [2021-06-01 19:14:57,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130644 to 113668. [2021-06-01 19:14:57,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113668 states, 113667 states have (on average 4.706968601265099) internal successors, (535027), 113667 states have internal predecessors, (535027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:58,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113668 states to 113668 states and 535027 transitions. [2021-06-01 19:14:58,436 INFO L78 Accepts]: Start accepts. Automaton has 113668 states and 535027 transitions. Word has length 41 [2021-06-01 19:14:58,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:14:58,436 INFO L482 AbstractCegarLoop]: Abstraction has 113668 states and 535027 transitions. [2021-06-01 19:14:58,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:14:58,436 INFO L276 IsEmpty]: Start isEmpty. Operand 113668 states and 535027 transitions. [2021-06-01 19:14:58,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-01 19:14:58,712 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:14:58,712 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:14:58,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-01 19:14:58,912 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:14:58,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:14:58,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1028693574, now seen corresponding path program 26 times [2021-06-01 19:14:58,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:14:58,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401275710] [2021-06-01 19:14:58,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:14:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:14:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:14:58,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:14:58,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401275710] [2021-06-01 19:14:58,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401275710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:14:58,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891163630] [2021-06-01 19:14:58,964 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:14:58,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 19:14:58,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:14:58,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-01 19:14:59,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:14:59,127 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:14:59,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891163630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:14:59,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:14:59,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 19:14:59,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177581730] [2021-06-01 19:14:59,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 19:14:59,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:14:59,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 19:14:59,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-01 19:14:59,129 INFO L87 Difference]: Start difference. First operand 113668 states and 535027 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:15:00,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:15:00,490 INFO L93 Difference]: Finished difference Result 140482 states and 651032 transitions. [2021-06-01 19:15:00,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 19:15:00,492 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-01 19:15:00,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:15:01,063 INFO L225 Difference]: With dead ends: 140482 [2021-06-01 19:15:01,063 INFO L226 Difference]: Without dead ends: 139756 [2021-06-01 19:15:01,063 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-06-01 19:15:01,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139756 states. [2021-06-01 19:15:04,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139756 to 118405. [2021-06-01 19:15:04,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118405 states, 118404 states have (on average 4.725110638154116) internal successors, (559472), 118404 states have internal predecessors, (559472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:15:05,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118405 states to 118405 states and 559472 transitions. [2021-06-01 19:15:05,392 INFO L78 Accepts]: Start accepts. Automaton has 118405 states and 559472 transitions. Word has length 41 [2021-06-01 19:15:05,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:15:05,392 INFO L482 AbstractCegarLoop]: Abstraction has 118405 states and 559472 transitions. [2021-06-01 19:15:05,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:15:05,393 INFO L276 IsEmpty]: Start isEmpty. Operand 118405 states and 559472 transitions. [2021-06-01 19:15:05,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-01 19:15:05,685 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:15:05,685 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:15:05,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-01 19:15:05,886 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:15:05,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:15:05,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1153866818, now seen corresponding path program 27 times [2021-06-01 19:15:05,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:15:05,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134899146] [2021-06-01 19:15:05,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:15:05,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:15:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:15:05,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:15:05,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134899146] [2021-06-01 19:15:05,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134899146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:15:05,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601674462] [2021-06-01 19:15:05,947 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:15:05,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-01 19:15:05,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:15:05,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-01 19:15:05,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:15:06,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 19:15:06,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601674462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:15:06,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:15:06,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-01 19:15:06,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650075906] [2021-06-01 19:15:06,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-01 19:15:06,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:15:06,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-01 19:15:06,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-01 19:15:06,124 INFO L87 Difference]: Start difference. First operand 118405 states and 559472 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:15:07,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:15:07,856 INFO L93 Difference]: Finished difference Result 186146 states and 866917 transitions. [2021-06-01 19:15:07,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 19:15:07,857 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-01 19:15:07,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:15:09,207 INFO L225 Difference]: With dead ends: 186146 [2021-06-01 19:15:09,208 INFO L226 Difference]: Without dead ends: 183395 [2021-06-01 19:15:09,208 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 113.1ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-01 19:15:09,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183395 states. [2021-06-01 19:15:13,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183395 to 148831. [2021-06-01 19:15:13,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148831 states, 148830 states have (on average 4.731868574884096) internal successors, (704244), 148830 states have internal predecessors, (704244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:15:14,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148831 states to 148831 states and 704244 transitions. [2021-06-01 19:15:14,572 INFO L78 Accepts]: Start accepts. Automaton has 148831 states and 704244 transitions. Word has length 41 [2021-06-01 19:15:14,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:15:14,572 INFO L482 AbstractCegarLoop]: Abstraction has 148831 states and 704244 transitions. [2021-06-01 19:15:14,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:15:14,573 INFO L276 IsEmpty]: Start isEmpty. Operand 148831 states and 704244 transitions. [2021-06-01 19:15:14,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-01 19:15:14,938 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:15:14,938 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:15:15,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-01 19:15:15,138 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:15:15,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:15:15,139 INFO L82 PathProgramCache]: Analyzing trace with hash 577386450, now seen corresponding path program 28 times [2021-06-01 19:15:15,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:15:15,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971419951] [2021-06-01 19:15:15,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:15:15,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:15:15,807 WARN L205 SmtUtils]: Spent 620.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-01 19:15:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:15:15,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:15:15,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971419951] [2021-06-01 19:15:15,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971419951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:15:15,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976125912] [2021-06-01 19:15:15,818 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:15:15,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 19:15:15,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:15:15,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-01 19:15:15,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:15:16,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:15:16,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976125912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:15:16,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:15:16,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-01 19:15:16,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242270380] [2021-06-01 19:15:16,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 19:15:16,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:15:16,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 19:15:16,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-01 19:15:16,015 INFO L87 Difference]: Start difference. First operand 148831 states and 704244 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:15:18,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:15:18,644 INFO L93 Difference]: Finished difference Result 327820 states and 1534054 transitions. [2021-06-01 19:15:18,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-01 19:15:18,645 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-01 19:15:18,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:15:20,650 INFO L225 Difference]: With dead ends: 327820 [2021-06-01 19:15:20,650 INFO L226 Difference]: Without dead ends: 324633 [2021-06-01 19:15:20,650 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 757.6ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-01 19:15:21,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324633 states. [2021-06-01 19:15:28,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324633 to 239665. [2021-06-01 19:15:29,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239665 states, 239664 states have (on average 4.810242673075639) internal successors, (1152842), 239664 states have internal predecessors, (1152842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:15:31,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239665 states to 239665 states and 1152842 transitions. [2021-06-01 19:15:31,023 INFO L78 Accepts]: Start accepts. Automaton has 239665 states and 1152842 transitions. Word has length 41 [2021-06-01 19:15:31,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:15:31,023 INFO L482 AbstractCegarLoop]: Abstraction has 239665 states and 1152842 transitions. [2021-06-01 19:15:31,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:15:31,023 INFO L276 IsEmpty]: Start isEmpty. Operand 239665 states and 1152842 transitions. [2021-06-01 19:15:32,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-01 19:15:32,455 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:15:32,456 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:15:32,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:15:32,671 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:15:32,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:15:32,672 INFO L82 PathProgramCache]: Analyzing trace with hash -29926074, now seen corresponding path program 29 times [2021-06-01 19:15:32,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:15:32,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303179435] [2021-06-01 19:15:32,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:15:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:15:32,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:15:32,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:15:32,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303179435] [2021-06-01 19:15:32,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303179435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:15:32,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59962082] [2021-06-01 19:15:32,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:15:32,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-01 19:15:32,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:15:32,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-01 19:15:32,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:15:32,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 19:15:32,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59962082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:15:32,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:15:32,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-01 19:15:32,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189657641] [2021-06-01 19:15:32,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-01 19:15:32,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:15:32,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-01 19:15:32,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-01 19:15:32,905 INFO L87 Difference]: Start difference. First operand 239665 states and 1152842 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:15:35,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:15:35,274 INFO L93 Difference]: Finished difference Result 283707 states and 1353356 transitions. [2021-06-01 19:15:35,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 19:15:35,275 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-01 19:15:35,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:15:37,001 INFO L225 Difference]: With dead ends: 283707 [2021-06-01 19:15:37,001 INFO L226 Difference]: Without dead ends: 283245 [2021-06-01 19:15:37,002 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-01 19:15:37,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283245 states. [2021-06-01 19:15:43,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283245 to 208767. [2021-06-01 19:15:43,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208767 states, 208766 states have (on average 4.808431449565543) internal successors, (1003837), 208766 states have internal predecessors, (1003837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:15:46,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208767 states to 208767 states and 1003837 transitions. [2021-06-01 19:15:46,309 INFO L78 Accepts]: Start accepts. Automaton has 208767 states and 1003837 transitions. Word has length 41 [2021-06-01 19:15:46,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:15:46,309 INFO L482 AbstractCegarLoop]: Abstraction has 208767 states and 1003837 transitions. [2021-06-01 19:15:46,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:15:46,309 INFO L276 IsEmpty]: Start isEmpty. Operand 208767 states and 1003837 transitions. [2021-06-01 19:15:46,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-01 19:15:46,977 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:15:46,977 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:15:47,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-01 19:15:47,193 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:15:47,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:15:47,193 INFO L82 PathProgramCache]: Analyzing trace with hash -338476918, now seen corresponding path program 30 times [2021-06-01 19:15:47,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:15:47,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916382077] [2021-06-01 19:15:47,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:15:47,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:15:47,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:15:47,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:15:47,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916382077] [2021-06-01 19:15:47,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916382077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:15:47,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704864289] [2021-06-01 19:15:47,268 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:15:47,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-01 19:15:47,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:15:47,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-01 19:15:47,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:15:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 19:15:47,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704864289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:15:47,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:15:47,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-01 19:15:47,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874608198] [2021-06-01 19:15:47,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-01 19:15:47,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:15:47,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-01 19:15:47,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-01 19:15:47,437 INFO L87 Difference]: Start difference. First operand 208767 states and 1003837 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:15:50,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:15:50,536 INFO L93 Difference]: Finished difference Result 263379 states and 1254429 transitions. [2021-06-01 19:15:50,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 19:15:50,536 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-01 19:15:50,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:15:52,421 INFO L225 Difference]: With dead ends: 263379 [2021-06-01 19:15:52,421 INFO L226 Difference]: Without dead ends: 260502 [2021-06-01 19:15:52,421 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 123.4ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-01 19:15:52,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260502 states. [2021-06-01 19:15:56,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260502 to 116427. [2021-06-01 19:15:57,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116427 states, 116426 states have (on average 4.769922525896278) internal successors, (555343), 116426 states have internal predecessors, (555343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:15:58,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116427 states to 116427 states and 555343 transitions. [2021-06-01 19:15:58,083 INFO L78 Accepts]: Start accepts. Automaton has 116427 states and 555343 transitions. Word has length 41 [2021-06-01 19:15:58,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:15:58,083 INFO L482 AbstractCegarLoop]: Abstraction has 116427 states and 555343 transitions. [2021-06-01 19:15:58,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:15:58,084 INFO L276 IsEmpty]: Start isEmpty. Operand 116427 states and 555343 transitions. [2021-06-01 19:15:58,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-01 19:15:58,484 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:15:58,484 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:15:58,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-01 19:15:58,685 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:15:58,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:15:58,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1886674710, now seen corresponding path program 31 times [2021-06-01 19:15:58,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:15:58,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655205369] [2021-06-01 19:15:58,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:15:58,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:15:58,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:15:58,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:15:58,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655205369] [2021-06-01 19:15:58,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655205369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:15:58,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200409761] [2021-06-01 19:15:58,735 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:15:58,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:15:58,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-01 19:15:58,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:15:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:15:58,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200409761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:15:58,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:15:58,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-01 19:15:58,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362194828] [2021-06-01 19:15:58,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 19:15:58,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:15:58,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 19:15:58,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-01 19:15:58,860 INFO L87 Difference]: Start difference. First operand 116427 states and 555343 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:16:00,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:16:00,880 INFO L93 Difference]: Finished difference Result 223049 states and 1035432 transitions. [2021-06-01 19:16:00,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 19:16:00,880 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-01 19:16:00,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:16:01,798 INFO L225 Difference]: With dead ends: 223049 [2021-06-01 19:16:01,798 INFO L226 Difference]: Without dead ends: 220377 [2021-06-01 19:16:01,799 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 111.4ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-01 19:16:02,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220377 states. [2021-06-01 19:16:06,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220377 to 155837. [2021-06-01 19:16:07,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155837 states, 155836 states have (on average 4.806129520778254) internal successors, (748968), 155836 states have internal predecessors, (748968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:16:08,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155837 states to 155837 states and 748968 transitions. [2021-06-01 19:16:08,532 INFO L78 Accepts]: Start accepts. Automaton has 155837 states and 748968 transitions. Word has length 41 [2021-06-01 19:16:08,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:16:08,532 INFO L482 AbstractCegarLoop]: Abstraction has 155837 states and 748968 transitions. [2021-06-01 19:16:08,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:16:08,532 INFO L276 IsEmpty]: Start isEmpty. Operand 155837 states and 748968 transitions. [2021-06-01 19:16:09,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-01 19:16:09,025 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:16:09,025 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:16:09,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:16:09,226 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:16:09,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:16:09,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1658788934, now seen corresponding path program 32 times [2021-06-01 19:16:09,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:16:09,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415070131] [2021-06-01 19:16:09,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:16:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:16:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:16:09,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:16:09,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415070131] [2021-06-01 19:16:09,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415070131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:16:09,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204625812] [2021-06-01 19:16:09,284 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:16:09,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 19:16:09,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:16:09,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-01 19:16:09,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:16:09,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 19:16:09,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204625812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:16:09,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:16:09,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-01 19:16:09,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523794113] [2021-06-01 19:16:09,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-01 19:16:09,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:16:09,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-01 19:16:09,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-01 19:16:09,424 INFO L87 Difference]: Start difference. First operand 155837 states and 748968 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:16:11,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:16:11,480 INFO L93 Difference]: Finished difference Result 212915 states and 1012751 transitions. [2021-06-01 19:16:11,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 19:16:11,481 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-01 19:16:11,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:16:12,346 INFO L225 Difference]: With dead ends: 212915 [2021-06-01 19:16:12,346 INFO L226 Difference]: Without dead ends: 210423 [2021-06-01 19:16:12,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-01 19:16:13,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210423 states. [2021-06-01 19:16:17,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210423 to 174189. [2021-06-01 19:16:17,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174189 states, 174188 states have (on average 4.835143637908467) internal successors, (842224), 174188 states have internal predecessors, (842224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:16:19,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174189 states to 174189 states and 842224 transitions. [2021-06-01 19:16:19,394 INFO L78 Accepts]: Start accepts. Automaton has 174189 states and 842224 transitions. Word has length 41 [2021-06-01 19:16:19,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:16:19,394 INFO L482 AbstractCegarLoop]: Abstraction has 174189 states and 842224 transitions. [2021-06-01 19:16:19,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:16:19,394 INFO L276 IsEmpty]: Start isEmpty. Operand 174189 states and 842224 transitions. [2021-06-01 19:16:19,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-01 19:16:19,876 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:16:19,876 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:16:20,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-01 19:16:20,076 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:16:20,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:16:20,077 INFO L82 PathProgramCache]: Analyzing trace with hash -2084693554, now seen corresponding path program 33 times [2021-06-01 19:16:20,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:16:20,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373335408] [2021-06-01 19:16:20,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:16:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:16:20,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:16:20,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:16:20,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373335408] [2021-06-01 19:16:20,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373335408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:16:20,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329663876] [2021-06-01 19:16:20,144 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:16:20,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-01 19:16:20,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:16:20,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-01 19:16:20,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:16:20,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:16:20,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329663876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:16:20,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:16:20,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-01 19:16:20,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686049780] [2021-06-01 19:16:20,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-01 19:16:20,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:16:20,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-01 19:16:20,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-01 19:16:20,296 INFO L87 Difference]: Start difference. First operand 174189 states and 842224 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:16:24,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:16:24,846 INFO L93 Difference]: Finished difference Result 397194 states and 1899439 transitions. [2021-06-01 19:16:24,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-01 19:16:24,847 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-01 19:16:24,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:16:27,975 INFO L225 Difference]: With dead ends: 397194 [2021-06-01 19:16:27,975 INFO L226 Difference]: Without dead ends: 393877 [2021-06-01 19:16:27,976 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 157.6ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-06-01 19:16:28,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393877 states. [2021-06-01 19:16:39,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393877 to 269480. [2021-06-01 19:16:39,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269480 states, 269479 states have (on average 4.951157604117575) internal successors, (1334233), 269479 states have internal predecessors, (1334233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:16:42,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269480 states to 269480 states and 1334233 transitions. [2021-06-01 19:16:42,412 INFO L78 Accepts]: Start accepts. Automaton has 269480 states and 1334233 transitions. Word has length 41 [2021-06-01 19:16:42,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:16:42,413 INFO L482 AbstractCegarLoop]: Abstraction has 269480 states and 1334233 transitions. [2021-06-01 19:16:42,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:16:42,413 INFO L276 IsEmpty]: Start isEmpty. Operand 269480 states and 1334233 transitions. [2021-06-01 19:16:43,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-01 19:16:43,187 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:16:43,188 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:16:43,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:16:43,393 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:16:43,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:16:43,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1494171274, now seen corresponding path program 34 times [2021-06-01 19:16:43,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:16:43,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77992821] [2021-06-01 19:16:43,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:16:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:16:43,465 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:16:43,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:16:43,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77992821] [2021-06-01 19:16:43,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77992821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:16:43,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762392665] [2021-06-01 19:16:43,465 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:16:43,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 19:16:43,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:16:43,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-01 19:16:43,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:16:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 19:16:43,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762392665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:16:43,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:16:43,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-01 19:16:43,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708598176] [2021-06-01 19:16:43,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-01 19:16:43,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:16:43,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-01 19:16:43,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-01 19:16:43,620 INFO L87 Difference]: Start difference. First operand 269480 states and 1334233 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:16:46,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:16:46,811 INFO L93 Difference]: Finished difference Result 316931 states and 1549745 transitions. [2021-06-01 19:16:46,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 19:16:46,812 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-01 19:16:46,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:16:48,149 INFO L225 Difference]: With dead ends: 316931 [2021-06-01 19:16:48,149 INFO L226 Difference]: Without dead ends: 316481 [2021-06-01 19:16:48,150 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 122.8ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-01 19:16:49,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316481 states. [2021-06-01 19:16:55,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316481 to 205144. [2021-06-01 19:16:55,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205144 states, 205143 states have (on average 4.904305776945837) internal successors, (1006084), 205143 states have internal predecessors, (1006084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:16:57,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205144 states to 205144 states and 1006084 transitions. [2021-06-01 19:16:57,161 INFO L78 Accepts]: Start accepts. Automaton has 205144 states and 1006084 transitions. Word has length 41 [2021-06-01 19:16:57,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:16:57,161 INFO L482 AbstractCegarLoop]: Abstraction has 205144 states and 1006084 transitions. [2021-06-01 19:16:57,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:16:57,161 INFO L276 IsEmpty]: Start isEmpty. Operand 205144 states and 1006084 transitions. [2021-06-01 19:16:57,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-01 19:16:57,738 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:16:57,738 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:16:57,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-01 19:16:57,938 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:16:57,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:16:57,945 INFO L82 PathProgramCache]: Analyzing trace with hash 518963082, now seen corresponding path program 35 times [2021-06-01 19:16:57,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:16:57,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342880383] [2021-06-01 19:16:57,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:16:57,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:16:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:16:58,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:16:58,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342880383] [2021-06-01 19:16:58,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342880383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:16:58,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854007781] [2021-06-01 19:16:58,020 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:16:58,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-01 19:16:58,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:16:58,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-01 19:16:58,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:16:58,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 19:16:58,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854007781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:16:58,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:16:58,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-01 19:16:58,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450094028] [2021-06-01 19:16:58,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-01 19:16:58,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:16:58,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-01 19:16:58,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-01 19:16:58,180 INFO L87 Difference]: Start difference. First operand 205144 states and 1006084 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:17:01,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:17:01,685 INFO L93 Difference]: Finished difference Result 351280 states and 1697991 transitions. [2021-06-01 19:17:01,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-01 19:17:01,686 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-01 19:17:01,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:17:03,151 INFO L225 Difference]: With dead ends: 351280 [2021-06-01 19:17:03,151 INFO L226 Difference]: Without dead ends: 347746 [2021-06-01 19:17:03,152 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 153.5ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-01 19:17:04,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347746 states. [2021-06-01 19:17:12,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347746 to 266100. [2021-06-01 19:17:13,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266100 states, 266099 states have (on average 4.991721126347713) internal successors, (1328292), 266099 states have internal predecessors, (1328292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:17:15,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266100 states to 266100 states and 1328292 transitions. [2021-06-01 19:17:15,367 INFO L78 Accepts]: Start accepts. Automaton has 266100 states and 1328292 transitions. Word has length 41 [2021-06-01 19:17:15,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:17:15,367 INFO L482 AbstractCegarLoop]: Abstraction has 266100 states and 1328292 transitions. [2021-06-01 19:17:15,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:17:15,368 INFO L276 IsEmpty]: Start isEmpty. Operand 266100 states and 1328292 transitions. [2021-06-01 19:17:16,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-01 19:17:16,148 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:17:16,148 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:17:16,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-01 19:17:16,348 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:17:16,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:17:16,349 INFO L82 PathProgramCache]: Analyzing trace with hash 445372220, now seen corresponding path program 36 times [2021-06-01 19:17:16,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:17:16,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223886240] [2021-06-01 19:17:16,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:17:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:17:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-01 19:17:16,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:17:16,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223886240] [2021-06-01 19:17:16,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223886240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:17:16,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710336359] [2021-06-01 19:17:16,405 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:17:16,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-01 19:17:16,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:17:16,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 19:17:16,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:17:16,549 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-01 19:17:16,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710336359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:17:16,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:17:16,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-01 19:17:16,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627236530] [2021-06-01 19:17:16,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 19:17:16,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:17:16,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 19:17:16,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-01 19:17:16,550 INFO L87 Difference]: Start difference. First operand 266100 states and 1328292 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:17:17,163 WARN L205 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2021-06-01 19:17:23,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:17:23,075 INFO L93 Difference]: Finished difference Result 517007 states and 2493362 transitions. [2021-06-01 19:17:23,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-01 19:17:23,076 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-01 19:17:23,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:17:26,128 INFO L225 Difference]: With dead ends: 517007 [2021-06-01 19:17:26,129 INFO L226 Difference]: Without dead ends: 515961 [2021-06-01 19:17:26,129 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 915.3ms TimeCoverageRelationStatistics Valid=365, Invalid=967, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 19:17:26,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515961 states. [2021-06-01 19:17:35,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515961 to 210221. [2021-06-01 19:17:35,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210221 states, 210220 states have (on average 4.792717153458282) internal successors, (1007525), 210220 states have internal predecessors, (1007525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:17:36,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210221 states to 210221 states and 1007525 transitions. [2021-06-01 19:17:36,410 INFO L78 Accepts]: Start accepts. Automaton has 210221 states and 1007525 transitions. Word has length 43 [2021-06-01 19:17:36,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:17:36,410 INFO L482 AbstractCegarLoop]: Abstraction has 210221 states and 1007525 transitions. [2021-06-01 19:17:36,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:17:36,410 INFO L276 IsEmpty]: Start isEmpty. Operand 210221 states and 1007525 transitions. [2021-06-01 19:17:37,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-01 19:17:37,780 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:17:37,780 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:17:37,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-01 19:17:37,988 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:17:37,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:17:37,989 INFO L82 PathProgramCache]: Analyzing trace with hash -172125824, now seen corresponding path program 37 times [2021-06-01 19:17:37,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:17:37,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354963435] [2021-06-01 19:17:37,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:17:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:17:38,032 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-01 19:17:38,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:17:38,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354963435] [2021-06-01 19:17:38,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354963435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:17:38,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232090761] [2021-06-01 19:17:38,032 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:17:38,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:17:38,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-01 19:17:38,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:17:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-01 19:17:38,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232090761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:17:38,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:17:38,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-01 19:17:38,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083514091] [2021-06-01 19:17:38,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 19:17:38,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:17:38,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 19:17:38,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-01 19:17:38,164 INFO L87 Difference]: Start difference. First operand 210221 states and 1007525 transitions. Second operand has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:17:43,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:17:43,161 INFO L93 Difference]: Finished difference Result 490894 states and 2284771 transitions. [2021-06-01 19:17:43,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-01 19:17:43,161 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-01 19:17:43,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:17:45,383 INFO L225 Difference]: With dead ends: 490894 [2021-06-01 19:17:45,383 INFO L226 Difference]: Without dead ends: 487402 [2021-06-01 19:17:45,384 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 295.5ms TimeCoverageRelationStatistics Valid=512, Invalid=1210, Unknown=0, NotChecked=0, Total=1722 [2021-06-01 19:17:46,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487402 states. [2021-06-01 19:17:56,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487402 to 245403. [2021-06-01 19:17:56,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245403 states, 245402 states have (on average 4.805160512139265) internal successors, (1179196), 245402 states have internal predecessors, (1179196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:17:58,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245403 states to 245403 states and 1179196 transitions. [2021-06-01 19:17:58,748 INFO L78 Accepts]: Start accepts. Automaton has 245403 states and 1179196 transitions. Word has length 43 [2021-06-01 19:17:58,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:17:58,748 INFO L482 AbstractCegarLoop]: Abstraction has 245403 states and 1179196 transitions. [2021-06-01 19:17:58,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:17:58,748 INFO L276 IsEmpty]: Start isEmpty. Operand 245403 states and 1179196 transitions. [2021-06-01 19:17:59,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-01 19:17:59,532 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:17:59,532 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:17:59,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-01 19:17:59,733 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:17:59,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:17:59,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1881822596, now seen corresponding path program 38 times [2021-06-01 19:17:59,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:17:59,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825361291] [2021-06-01 19:17:59,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:17:59,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:17:59,770 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-01 19:17:59,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:17:59,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825361291] [2021-06-01 19:17:59,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825361291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:17:59,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807446859] [2021-06-01 19:17:59,770 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:17:59,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 19:17:59,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:17:59,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 19:17:59,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:17:59,910 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-01 19:17:59,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807446859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:17:59,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:17:59,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-01 19:17:59,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521949805] [2021-06-01 19:17:59,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 19:17:59,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:17:59,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 19:17:59,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-01 19:17:59,911 INFO L87 Difference]: Start difference. First operand 245403 states and 1179196 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:18:04,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:18:04,270 INFO L93 Difference]: Finished difference Result 401083 states and 1918180 transitions. [2021-06-01 19:18:04,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-01 19:18:04,270 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-01 19:18:04,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:18:06,749 INFO L225 Difference]: With dead ends: 401083 [2021-06-01 19:18:06,749 INFO L226 Difference]: Without dead ends: 400185 [2021-06-01 19:18:06,750 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 369.2ms TimeCoverageRelationStatistics Valid=354, Invalid=978, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 19:18:07,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400185 states. [2021-06-01 19:18:12,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400185 to 102134. [2021-06-01 19:18:12,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102134 states, 102133 states have (on average 4.781363516199465) internal successors, (488335), 102133 states have internal predecessors, (488335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:18:13,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102134 states to 102134 states and 488335 transitions. [2021-06-01 19:18:13,956 INFO L78 Accepts]: Start accepts. Automaton has 102134 states and 488335 transitions. Word has length 43 [2021-06-01 19:18:13,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:18:13,956 INFO L482 AbstractCegarLoop]: Abstraction has 102134 states and 488335 transitions. [2021-06-01 19:18:13,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:18:13,956 INFO L276 IsEmpty]: Start isEmpty. Operand 102134 states and 488335 transitions. [2021-06-01 19:18:14,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-01 19:18:14,419 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:18:14,419 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:18:14,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:18:14,633 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:18:14,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:18:14,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1183096580, now seen corresponding path program 39 times [2021-06-01 19:18:14,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:18:14,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135392662] [2021-06-01 19:18:14,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:18:14,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:18:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-01 19:18:14,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:18:14,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135392662] [2021-06-01 19:18:14,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135392662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:18:14,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685903416] [2021-06-01 19:18:14,732 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:18:14,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 19:18:14,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:18:14,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 19:18:14,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:18:14,981 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-01 19:18:14,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685903416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:18:14,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:18:14,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-01 19:18:14,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76922] [2021-06-01 19:18:14,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-01 19:18:14,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:18:14,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-01 19:18:14,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-01 19:18:14,982 INFO L87 Difference]: Start difference. First operand 102134 states and 488335 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:18:19,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:18:19,566 INFO L93 Difference]: Finished difference Result 359669 states and 1677307 transitions. [2021-06-01 19:18:19,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-01 19:18:19,567 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 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 43 [2021-06-01 19:18:19,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:18:22,188 INFO L225 Difference]: With dead ends: 359669 [2021-06-01 19:18:22,189 INFO L226 Difference]: Without dead ends: 358139 [2021-06-01 19:18:22,190 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1809 ImplicationChecksByTransitivity, 989.4ms TimeCoverageRelationStatistics Valid=1034, Invalid=4222, Unknown=0, NotChecked=0, Total=5256 [2021-06-01 19:18:22,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358139 states. [2021-06-01 19:18:27,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358139 to 139202. [2021-06-01 19:18:27,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139202 states, 139201 states have (on average 4.859584342066508) internal successors, (676459), 139201 states have internal predecessors, (676459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:18:29,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139202 states to 139202 states and 676459 transitions. [2021-06-01 19:18:29,012 INFO L78 Accepts]: Start accepts. Automaton has 139202 states and 676459 transitions. Word has length 43 [2021-06-01 19:18:29,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:18:29,012 INFO L482 AbstractCegarLoop]: Abstraction has 139202 states and 676459 transitions. [2021-06-01 19:18:29,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:18:29,012 INFO L276 IsEmpty]: Start isEmpty. Operand 139202 states and 676459 transitions. [2021-06-01 19:18:29,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-01 19:18:29,404 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:18:29,404 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:18:29,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-01 19:18:29,605 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:18:29,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:18:29,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1105009528, now seen corresponding path program 40 times [2021-06-01 19:18:29,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:18:29,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587358279] [2021-06-01 19:18:29,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:18:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:18:29,644 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-01 19:18:29,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:18:29,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587358279] [2021-06-01 19:18:29,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587358279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:18:29,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256709093] [2021-06-01 19:18:29,644 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:18:29,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 19:18:29,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:18:29,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 19:18:29,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:18:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-01 19:18:29,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256709093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:18:29,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:18:29,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-01 19:18:29,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717574936] [2021-06-01 19:18:29,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 19:18:29,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:18:29,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 19:18:29,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-01 19:18:29,818 INFO L87 Difference]: Start difference. First operand 139202 states and 676459 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:18:33,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:18:33,397 INFO L93 Difference]: Finished difference Result 318028 states and 1526515 transitions. [2021-06-01 19:18:33,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-01 19:18:33,398 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-01 19:18:33,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:18:34,793 INFO L225 Difference]: With dead ends: 318028 [2021-06-01 19:18:34,793 INFO L226 Difference]: Without dead ends: 317616 [2021-06-01 19:18:34,793 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 357.0ms TimeCoverageRelationStatistics Valid=359, Invalid=901, Unknown=0, NotChecked=0, Total=1260 [2021-06-01 19:18:35,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317616 states. [2021-06-01 19:18:40,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317616 to 168176. [2021-06-01 19:18:40,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168176 states, 168175 states have (on average 4.916592834844656) internal successors, (826848), 168175 states have internal predecessors, (826848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:18:41,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168176 states to 168176 states and 826848 transitions. [2021-06-01 19:18:41,727 INFO L78 Accepts]: Start accepts. Automaton has 168176 states and 826848 transitions. Word has length 43 [2021-06-01 19:18:41,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:18:41,727 INFO L482 AbstractCegarLoop]: Abstraction has 168176 states and 826848 transitions. [2021-06-01 19:18:41,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:18:41,728 INFO L276 IsEmpty]: Start isEmpty. Operand 168176 states and 826848 transitions. [2021-06-01 19:18:42,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-01 19:18:42,983 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:18:42,983 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-01 19:18:43,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:18:43,183 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:18:43,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:18:43,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1379806714, now seen corresponding path program 41 times [2021-06-01 19:18:43,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:18:43,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582925186] [2021-06-01 19:18:43,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:18:43,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:18:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-01 19:18:43,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:18:43,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582925186] [2021-06-01 19:18:43,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582925186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:18:43,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824279939] [2021-06-01 19:18:43,230 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:18:43,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-01 19:18:43,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:18:43,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-01 19:18:43,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:18:43,370 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-01 19:18:43,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824279939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:18:43,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:18:43,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-01 19:18:43,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713159673] [2021-06-01 19:18:43,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 19:18:43,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:18:43,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 19:18:43,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-01 19:18:43,372 INFO L87 Difference]: Start difference. First operand 168176 states and 826848 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:18:49,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:18:49,791 INFO L93 Difference]: Finished difference Result 593260 states and 2867141 transitions. [2021-06-01 19:18:49,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-01 19:18:49,792 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-01 19:18:49,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:18:53,232 INFO L225 Difference]: With dead ends: 593260 [2021-06-01 19:18:53,232 INFO L226 Difference]: Without dead ends: 584415 [2021-06-01 19:18:53,233 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 453.8ms TimeCoverageRelationStatistics Valid=593, Invalid=1663, Unknown=0, NotChecked=0, Total=2256 [2021-06-01 19:18:54,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584415 states. [2021-06-01 19:19:04,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584415 to 206454. [2021-06-01 19:19:04,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206454 states, 206453 states have (on average 4.905571728189951) internal successors, (1012770), 206453 states have internal predecessors, (1012770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:19:06,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206454 states to 206454 states and 1012770 transitions. [2021-06-01 19:19:06,189 INFO L78 Accepts]: Start accepts. Automaton has 206454 states and 1012770 transitions. Word has length 45 [2021-06-01 19:19:06,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:19:06,189 INFO L482 AbstractCegarLoop]: Abstraction has 206454 states and 1012770 transitions. [2021-06-01 19:19:06,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:19:06,190 INFO L276 IsEmpty]: Start isEmpty. Operand 206454 states and 1012770 transitions. [2021-06-01 19:19:06,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-01 19:19:06,742 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:19:06,742 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-01 19:19:06,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:19:06,943 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:19:06,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:19:06,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1913141946, now seen corresponding path program 42 times [2021-06-01 19:19:06,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:19:06,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562709728] [2021-06-01 19:19:06,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:19:06,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:19:06,971 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-01 19:19:06,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:19:06,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562709728] [2021-06-01 19:19:06,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562709728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:19:06,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370212952] [2021-06-01 19:19:06,971 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:19:07,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-01 19:19:07,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:19:07,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 19:19:07,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:19:07,122 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-01 19:19:07,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370212952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:19:07,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:19:07,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2021-06-01 19:19:07,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197365027] [2021-06-01 19:19:07,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 19:19:07,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:19:07,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 19:19:07,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-01 19:19:07,124 INFO L87 Difference]: Start difference. First operand 206454 states and 1012770 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:19:07,954 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 11 [2021-06-01 19:19:13,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:19:13,720 INFO L93 Difference]: Finished difference Result 489163 states and 2277599 transitions. [2021-06-01 19:19:13,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-01 19:19:13,737 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-01 19:19:13,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:19:15,981 INFO L225 Difference]: With dead ends: 489163 [2021-06-01 19:19:15,982 INFO L226 Difference]: Without dead ends: 486417 [2021-06-01 19:19:15,982 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4571 ImplicationChecksByTransitivity, 1814.5ms TimeCoverageRelationStatistics Valid=2313, Invalid=8607, Unknown=0, NotChecked=0, Total=10920 [2021-06-01 19:19:17,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486417 states. [2021-06-01 19:19:25,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486417 to 219978. [2021-06-01 19:19:26,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219978 states, 219977 states have (on average 4.848534164935425) internal successors, (1066566), 219977 states have internal predecessors, (1066566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:19:27,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219978 states to 219978 states and 1066566 transitions. [2021-06-01 19:19:27,843 INFO L78 Accepts]: Start accepts. Automaton has 219978 states and 1066566 transitions. Word has length 45 [2021-06-01 19:19:27,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:19:27,843 INFO L482 AbstractCegarLoop]: Abstraction has 219978 states and 1066566 transitions. [2021-06-01 19:19:27,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:19:27,843 INFO L276 IsEmpty]: Start isEmpty. Operand 219978 states and 1066566 transitions. [2021-06-01 19:19:28,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-01 19:19:28,510 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:19:28,510 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-01 19:19:28,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-01 19:19:28,710 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:19:28,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:19:28,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1307644630, now seen corresponding path program 43 times [2021-06-01 19:19:28,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:19:28,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261816789] [2021-06-01 19:19:28,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:19:28,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:19:28,761 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-01 19:19:28,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:19:28,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261816789] [2021-06-01 19:19:28,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261816789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:19:28,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121664651] [2021-06-01 19:19:28,762 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:19:28,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:19:28,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 19:19:28,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:19:29,563 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-01 19:19:29,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121664651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:19:29,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:19:29,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-01 19:19:29,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514203573] [2021-06-01 19:19:29,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 19:19:29,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:19:29,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 19:19:29,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-01 19:19:29,564 INFO L87 Difference]: Start difference. First operand 219978 states and 1066566 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:19:32,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:19:32,457 INFO L93 Difference]: Finished difference Result 345677 states and 1612298 transitions. [2021-06-01 19:19:32,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-01 19:19:32,458 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 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 45 [2021-06-01 19:19:32,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:19:34,539 INFO L225 Difference]: With dead ends: 345677 [2021-06-01 19:19:34,539 INFO L226 Difference]: Without dead ends: 344598 [2021-06-01 19:19:34,540 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 300.1ms TimeCoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 19:19:34,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344598 states. [2021-06-01 19:19:41,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344598 to 187807. [2021-06-01 19:19:41,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187807 states, 187806 states have (on average 4.840143552389168) internal successors, (909008), 187806 states have internal predecessors, (909008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:19:43,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187807 states to 187807 states and 909008 transitions. [2021-06-01 19:19:43,591 INFO L78 Accepts]: Start accepts. Automaton has 187807 states and 909008 transitions. Word has length 45 [2021-06-01 19:19:43,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:19:43,591 INFO L482 AbstractCegarLoop]: Abstraction has 187807 states and 909008 transitions. [2021-06-01 19:19:43,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:19:43,591 INFO L276 IsEmpty]: Start isEmpty. Operand 187807 states and 909008 transitions. [2021-06-01 19:19:44,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-01 19:19:44,345 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:19:44,358 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-01 19:19:44,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:19:44,575 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:19:44,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:19:44,576 INFO L82 PathProgramCache]: Analyzing trace with hash 2065809986, now seen corresponding path program 44 times [2021-06-01 19:19:44,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:19:44,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706808202] [2021-06-01 19:19:44,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:19:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:19:44,630 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-01 19:19:44,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:19:44,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706808202] [2021-06-01 19:19:44,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706808202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:19:44,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035853304] [2021-06-01 19:19:44,630 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:19:44,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 19:19:44,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:19:44,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-01 19:19:44,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:19:44,803 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-01 19:19:44,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035853304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:19:44,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:19:44,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-01 19:19:44,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391604847] [2021-06-01 19:19:44,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 19:19:44,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:19:44,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 19:19:44,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-01 19:19:44,804 INFO L87 Difference]: Start difference. First operand 187807 states and 909008 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:19:49,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:19:49,150 INFO L93 Difference]: Finished difference Result 362878 states and 1697181 transitions. [2021-06-01 19:19:49,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-01 19:19:49,151 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 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 45 [2021-06-01 19:19:49,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:19:51,680 INFO L225 Difference]: With dead ends: 362878 [2021-06-01 19:19:51,686 INFO L226 Difference]: Without dead ends: 361792 [2021-06-01 19:19:51,686 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 875.1ms TimeCoverageRelationStatistics Valid=556, Invalid=1796, Unknown=0, NotChecked=0, Total=2352 [2021-06-01 19:19:52,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361792 states. [2021-06-01 19:19:59,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361792 to 265120. [2021-06-01 19:20:00,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265120 states, 265119 states have (on average 4.861846944202415) internal successors, (1288968), 265119 states have internal predecessors, (1288968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:20:02,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265120 states to 265120 states and 1288968 transitions. [2021-06-01 19:20:02,124 INFO L78 Accepts]: Start accepts. Automaton has 265120 states and 1288968 transitions. Word has length 45 [2021-06-01 19:20:02,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:20:02,124 INFO L482 AbstractCegarLoop]: Abstraction has 265120 states and 1288968 transitions. [2021-06-01 19:20:02,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:20:02,124 INFO L276 IsEmpty]: Start isEmpty. Operand 265120 states and 1288968 transitions. [2021-06-01 19:20:03,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-01 19:20:03,112 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:20:03,112 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-01 19:20:03,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-01 19:20:03,329 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:20:03,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:20:03,329 INFO L82 PathProgramCache]: Analyzing trace with hash 2086232522, now seen corresponding path program 45 times [2021-06-01 19:20:03,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:20:03,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287783790] [2021-06-01 19:20:03,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:20:03,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:20:04,039 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-01 19:20:04,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:20:04,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287783790] [2021-06-01 19:20:04,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287783790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:20:04,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189892164] [2021-06-01 19:20:04,039 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:20:04,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 19:20:04,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:20:04,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 19:20:04,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:20:04,210 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-01 19:20:04,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189892164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:20:04,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:20:04,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-01 19:20:04,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663165486] [2021-06-01 19:20:04,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 19:20:04,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:20:04,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 19:20:04,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-01 19:20:04,212 INFO L87 Difference]: Start difference. First operand 265120 states and 1288968 transitions. Second operand has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:20:11,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:20:11,488 INFO L93 Difference]: Finished difference Result 557436 states and 2590905 transitions. [2021-06-01 19:20:11,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-01 19:20:11,489 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-01 19:20:11,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:20:14,732 INFO L225 Difference]: With dead ends: 557436 [2021-06-01 19:20:14,732 INFO L226 Difference]: Without dead ends: 555086 [2021-06-01 19:20:14,733 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4062 ImplicationChecksByTransitivity, 2174.0ms TimeCoverageRelationStatistics Valid=2286, Invalid=8426, Unknown=0, NotChecked=0, Total=10712 [2021-06-01 19:20:15,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555086 states. [2021-06-01 19:20:30,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555086 to 417023. [2021-06-01 19:20:31,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417023 states, 417022 states have (on average 4.902988331550853) internal successors, (2044654), 417022 states have internal predecessors, (2044654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:20:35,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417023 states to 417023 states and 2044654 transitions. [2021-06-01 19:20:35,866 INFO L78 Accepts]: Start accepts. Automaton has 417023 states and 2044654 transitions. Word has length 45 [2021-06-01 19:20:35,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:20:35,866 INFO L482 AbstractCegarLoop]: Abstraction has 417023 states and 2044654 transitions. [2021-06-01 19:20:35,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:20:35,866 INFO L276 IsEmpty]: Start isEmpty. Operand 417023 states and 2044654 transitions. [2021-06-01 19:20:38,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-01 19:20:38,381 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:20:38,381 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-01 19:20:38,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:20:38,597 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:20:38,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:20:38,598 INFO L82 PathProgramCache]: Analyzing trace with hash -113271554, now seen corresponding path program 46 times [2021-06-01 19:20:38,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:20:38,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687634604] [2021-06-01 19:20:38,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:20:38,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:20:38,656 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-01 19:20:38,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:20:38,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687634604] [2021-06-01 19:20:38,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687634604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:20:38,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882991880] [2021-06-01 19:20:38,657 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:20:38,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 19:20:38,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:20:38,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-01 19:20:38,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:20:38,802 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-01 19:20:38,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882991880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:20:38,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:20:38,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-01 19:20:38,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938949234] [2021-06-01 19:20:38,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 19:20:38,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:20:38,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 19:20:38,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-01 19:20:38,804 INFO L87 Difference]: Start difference. First operand 417023 states and 2044654 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:20:48,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:20:48,731 INFO L93 Difference]: Finished difference Result 928977 states and 4483718 transitions. [2021-06-01 19:20:48,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-01 19:20:48,731 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-01 19:20:48,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:20:54,949 INFO L225 Difference]: With dead ends: 928977 [2021-06-01 19:20:54,950 INFO L226 Difference]: Without dead ends: 928257 [2021-06-01 19:20:54,950 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 348.9ms TimeCoverageRelationStatistics Valid=354, Invalid=978, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 19:20:56,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928257 states. [2021-06-01 19:21:20,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928257 to 605432. [2021-06-01 19:21:21,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605432 states, 605431 states have (on average 4.958003471906791) internal successors, (3001729), 605431 states have internal predecessors, (3001729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:21:26,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605432 states to 605432 states and 3001729 transitions. [2021-06-01 19:21:26,605 INFO L78 Accepts]: Start accepts. Automaton has 605432 states and 3001729 transitions. Word has length 45 [2021-06-01 19:21:26,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:21:26,606 INFO L482 AbstractCegarLoop]: Abstraction has 605432 states and 3001729 transitions. [2021-06-01 19:21:26,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:21:26,606 INFO L276 IsEmpty]: Start isEmpty. Operand 605432 states and 3001729 transitions. [2021-06-01 19:21:29,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-01 19:21:29,147 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:21:29,147 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-01 19:21:29,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-01 19:21:29,347 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:21:29,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:21:29,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1285587010, now seen corresponding path program 47 times [2021-06-01 19:21:29,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:21:29,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858056441] [2021-06-01 19:21:29,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:21:29,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:21:29,392 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-01 19:21:29,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:21:29,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858056441] [2021-06-01 19:21:29,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858056441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:21:29,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783763079] [2021-06-01 19:21:29,392 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:21:29,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-01 19:21:29,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:21:29,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-01 19:21:29,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:21:29,531 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-01 19:21:29,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783763079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:21:29,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:21:29,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-06-01 19:21:29,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663428164] [2021-06-01 19:21:29,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 19:21:29,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:21:29,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 19:21:29,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-01 19:21:29,532 INFO L87 Difference]: Start difference. First operand 605432 states and 3001729 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:21:44,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:21:44,227 INFO L93 Difference]: Finished difference Result 1140384 states and 5478626 transitions. [2021-06-01 19:21:44,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-01 19:21:44,227 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-01 19:21:44,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:21:51,482 INFO L225 Difference]: With dead ends: 1140384 [2021-06-01 19:21:51,482 INFO L226 Difference]: Without dead ends: 1137922 [2021-06-01 19:21:51,483 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 516.7ms TimeCoverageRelationStatistics Valid=660, Invalid=2096, Unknown=0, NotChecked=0, Total=2756 [2021-06-01 19:21:53,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137922 states. [2021-06-01 19:22:16,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137922 to 669469. [2021-06-01 19:22:17,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669469 states, 669468 states have (on average 4.940984483201587) internal successors, (3307831), 669468 states have internal predecessors, (3307831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:22:26,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669469 states to 669469 states and 3307831 transitions. [2021-06-01 19:22:26,342 INFO L78 Accepts]: Start accepts. Automaton has 669469 states and 3307831 transitions. Word has length 45 [2021-06-01 19:22:26,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:22:26,343 INFO L482 AbstractCegarLoop]: Abstraction has 669469 states and 3307831 transitions. [2021-06-01 19:22:26,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:22:26,343 INFO L276 IsEmpty]: Start isEmpty. Operand 669469 states and 3307831 transitions. [2021-06-01 19:22:30,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-01 19:22:30,347 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:22:30,347 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-01 19:22:30,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-01 19:22:30,563 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:22:30,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:22:30,564 INFO L82 PathProgramCache]: Analyzing trace with hash -538949502, now seen corresponding path program 48 times [2021-06-01 19:22:30,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:22:30,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63132432] [2021-06-01 19:22:30,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:22:30,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:22:30,627 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-01 19:22:30,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:22:30,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63132432] [2021-06-01 19:22:30,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63132432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:22:30,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851230269] [2021-06-01 19:22:30,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:22:30,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 19:22:30,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:22:30,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-01 19:22:30,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:22:30,864 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-01 19:22:30,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851230269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:22:30,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:22:30,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2021-06-01 19:22:30,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460242048] [2021-06-01 19:22:30,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 19:22:30,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:22:30,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 19:22:30,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-01 19:22:30,865 INFO L87 Difference]: Start difference. First operand 669469 states and 3307831 transitions. Second operand has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)