/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/array-eq-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 21:03:28,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 21:03:28,227 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 21:03:28,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 21:03:28,296 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 [2021-06-05 21:03:28,323 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 21:03:28,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 21:03:28,324 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 21:03:28,324 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 21:03:28,326 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 21:03:28,326 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 21:03:28,326 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 21:03:28,326 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 21:03:28,326 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 21:03:28,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 21:03:28,327 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 21:03:28,327 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 21:03:28,327 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 21:03:28,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 21:03:28,327 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 21:03:28,327 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 21:03:28,327 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 21:03:28,327 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 21:03:28,327 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 21:03:28,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 21:03:28,328 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 21:03:28,328 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 21:03:28,328 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 21:03:28,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 21:03:28,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 21:03:28,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 21:03:28,328 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 21:03:28,328 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 21:03:28,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 21:03:28,328 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 21:03:28,328 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 21:03:28,329 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 21:03:28,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 21:03:28,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 21:03:28,551 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 21:03:28,552 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 21:03:28,553 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 21:03:28,553 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-trans.wvr.bpl [2021-06-05 21:03:28,553 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-trans.wvr.bpl' [2021-06-05 21:03:28,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 21:03:28,596 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 21:03:28,597 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 21:03:28,597 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 21:03:28,597 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 21:03:28,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:03:28" (1/1) ... [2021-06-05 21:03:28,610 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:03:28" (1/1) ... [2021-06-05 21:03:28,616 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 21:03:28,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 21:03:28,618 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 21:03:28,619 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 21:03:28,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:03:28" (1/1) ... [2021-06-05 21:03:28,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:03:28" (1/1) ... [2021-06-05 21:03:28,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:03:28" (1/1) ... [2021-06-05 21:03:28,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:03:28" (1/1) ... [2021-06-05 21:03:28,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:03:28" (1/1) ... [2021-06-05 21:03:28,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:03:28" (1/1) ... [2021-06-05 21:03:28,648 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:03:28" (1/1) ... [2021-06-05 21:03:28,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 21:03:28,649 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 21:03:28,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 21:03:28,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 21:03:28,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:03:28" (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 [2021-06-05 21:03:28,704 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 21:03:28,704 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 21:03:28,704 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 21:03:28,704 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 21:03:28,704 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 21:03:28,704 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 21:03:28,704 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 21:03:28,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 21:03:28,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 21:03:28,705 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 21:03:28,705 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 21:03:28,705 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 21:03:28,705 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 21:03:28,826 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 21:03:28,826 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 21:03:28,827 INFO L202 PluginConnector]: Adding new model array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:03:28 BoogieIcfgContainer [2021-06-05 21:03:28,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 21:03:28,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 21:03:28,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 21:03:28,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 21:03:28,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:03:28" (1/2) ... [2021-06-05 21:03:28,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6757081c and model type array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 09:03:28, skipping insertion in model container [2021-06-05 21:03:28,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:03:28" (2/2) ... [2021-06-05 21:03:28,832 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.bpl [2021-06-05 21:03:28,835 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 21:03:28,836 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 21:03:28,836 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 21:03:28,836 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 21:03:28,860 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 21:03:28,887 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 21:03:28,930 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 21:03:28,930 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 21:03:28,931 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 21:03:28,931 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 21:03:28,931 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 21:03:28,931 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 21:03:28,931 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 21:03:28,931 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 21:03:28,947 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 35 transitions, 94 flow [2021-06-05 21:03:28,975 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 307 states, 305 states have (on average 3.3737704918032785) internal successors, (1029), 306 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:28,977 INFO L276 IsEmpty]: Start isEmpty. Operand has 307 states, 305 states have (on average 3.3737704918032785) internal successors, (1029), 306 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:28,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:03:28,987 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:28,987 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:28,987 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:28,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:28,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1022226388, now seen corresponding path program 1 times [2021-06-05 21:03:29,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:29,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259921794] [2021-06-05 21:03:29,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:29,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:29,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:29,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:29,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259921794] [2021-06-05 21:03:29,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259921794] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:03:29,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:03:29,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:03:29,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523962872] [2021-06-05 21:03:29,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:03:29,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:29,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:03:29,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:03:29,187 INFO L87 Difference]: Start difference. First operand has 307 states, 305 states have (on average 3.3737704918032785) internal successors, (1029), 306 states have internal predecessors, (1029), 0 states have call successors, (0), 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 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:29,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:29,302 INFO L93 Difference]: Finished difference Result 606 states and 2050 transitions. [2021-06-05 21:03:29,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:03:29,303 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:03:29,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:29,318 INFO L225 Difference]: With dead ends: 606 [2021-06-05 21:03:29,318 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 21:03:29,319 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:03:29,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 21:03:29,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 406. [2021-06-05 21:03:29,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.3580246913580245) internal successors, (1360), 405 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:29,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1360 transitions. [2021-06-05 21:03:29,376 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1360 transitions. Word has length 15 [2021-06-05 21:03:29,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:29,376 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 1360 transitions. [2021-06-05 21:03:29,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:29,377 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1360 transitions. [2021-06-05 21:03:29,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:03:29,379 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:29,380 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:29,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 21:03:29,380 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:29,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:29,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1372690376, now seen corresponding path program 1 times [2021-06-05 21:03:29,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:29,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94448937] [2021-06-05 21:03:29,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:29,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:29,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94448937] [2021-06-05 21:03:29,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94448937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:29,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600492301] [2021-06-05 21:03:29,444 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 [2021-06-05 21:03:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:29,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:03:29,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:29,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:29,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600492301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:29,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:29,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 21:03:29,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904135170] [2021-06-05 21:03:29,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:03:29,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:29,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:03:29,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:03:29,640 INFO L87 Difference]: Start difference. First operand 406 states and 1360 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:29,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:29,727 INFO L93 Difference]: Finished difference Result 1011 states and 3270 transitions. [2021-06-05 21:03:29,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:03:29,728 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:03:29,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:29,733 INFO L225 Difference]: With dead ends: 1011 [2021-06-05 21:03:29,733 INFO L226 Difference]: Without dead ends: 847 [2021-06-05 21:03:29,737 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:03:29,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-06-05 21:03:29,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 440. [2021-06-05 21:03:29,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 3.359908883826879) internal successors, (1475), 439 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:29,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1475 transitions. [2021-06-05 21:03:29,767 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1475 transitions. Word has length 18 [2021-06-05 21:03:29,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:29,768 INFO L482 AbstractCegarLoop]: Abstraction has 440 states and 1475 transitions. [2021-06-05 21:03:29,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:29,768 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1475 transitions. [2021-06-05 21:03:29,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:03:29,773 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:29,773 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:29,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 21:03:29,989 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:29,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:29,990 INFO L82 PathProgramCache]: Analyzing trace with hash -910224837, now seen corresponding path program 1 times [2021-06-05 21:03:29,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:29,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427635001] [2021-06-05 21:03:29,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:30,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:30,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:30,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427635001] [2021-06-05 21:03:30,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427635001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:30,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604996223] [2021-06-05 21:03:30,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:30,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:03:30,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:30,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604996223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:30,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:30,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-06-05 21:03:30,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112036137] [2021-06-05 21:03:30,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:03:30,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:30,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:03:30,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:30,304 INFO L87 Difference]: Start difference. First operand 440 states and 1475 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:30,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:30,713 INFO L93 Difference]: Finished difference Result 1656 states and 5504 transitions. [2021-06-05 21:03:30,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:03:30,714 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:03:30,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:30,721 INFO L225 Difference]: With dead ends: 1656 [2021-06-05 21:03:30,721 INFO L226 Difference]: Without dead ends: 1415 [2021-06-05 21:03:30,722 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 273.5ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:03:30,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-06-05 21:03:30,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 637. [2021-06-05 21:03:30,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.49685534591195) internal successors, (2224), 636 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:30,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 2224 transitions. [2021-06-05 21:03:30,750 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 2224 transitions. Word has length 18 [2021-06-05 21:03:30,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:30,750 INFO L482 AbstractCegarLoop]: Abstraction has 637 states and 2224 transitions. [2021-06-05 21:03:30,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:30,750 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 2224 transitions. [2021-06-05 21:03:30,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:03:30,751 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:30,751 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:30,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:30,968 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:30,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:30,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1302877552, now seen corresponding path program 1 times [2021-06-05 21:03:30,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:30,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373942195] [2021-06-05 21:03:30,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:31,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:31,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:31,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373942195] [2021-06-05 21:03:31,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373942195] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:03:31,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:03:31,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:03:31,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129772361] [2021-06-05 21:03:31,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:03:31,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:31,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:03:31,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:03:31,017 INFO L87 Difference]: Start difference. First operand 637 states and 2224 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:31,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:31,079 INFO L93 Difference]: Finished difference Result 1343 states and 4620 transitions. [2021-06-05 21:03:31,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:03:31,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:03:31,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:31,084 INFO L225 Difference]: With dead ends: 1343 [2021-06-05 21:03:31,084 INFO L226 Difference]: Without dead ends: 1119 [2021-06-05 21:03:31,084 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:03:31,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-06-05 21:03:31,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 792. [2021-06-05 21:03:31,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 3.4829329962073325) internal successors, (2755), 791 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:31,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2755 transitions. [2021-06-05 21:03:31,102 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2755 transitions. Word has length 18 [2021-06-05 21:03:31,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:31,102 INFO L482 AbstractCegarLoop]: Abstraction has 792 states and 2755 transitions. [2021-06-05 21:03:31,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:31,102 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2755 transitions. [2021-06-05 21:03:31,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:03:31,104 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:31,104 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:31,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 21:03:31,104 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:31,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:31,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1936831982, now seen corresponding path program 2 times [2021-06-05 21:03:31,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:31,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710621771] [2021-06-05 21:03:31,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:31,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:31,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:31,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710621771] [2021-06-05 21:03:31,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710621771] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:03:31,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:03:31,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:03:31,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182969666] [2021-06-05 21:03:31,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:03:31,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:31,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:03:31,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:03:31,146 INFO L87 Difference]: Start difference. First operand 792 states and 2755 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:31,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:31,205 INFO L93 Difference]: Finished difference Result 1367 states and 4635 transitions. [2021-06-05 21:03:31,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:03:31,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:03:31,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:31,210 INFO L225 Difference]: With dead ends: 1367 [2021-06-05 21:03:31,210 INFO L226 Difference]: Without dead ends: 1199 [2021-06-05 21:03:31,211 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:03:31,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-06-05 21:03:31,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 810. [2021-06-05 21:03:31,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.4561186650185416) internal successors, (2796), 809 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:31,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2796 transitions. [2021-06-05 21:03:31,229 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2796 transitions. Word has length 18 [2021-06-05 21:03:31,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:31,229 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2796 transitions. [2021-06-05 21:03:31,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:31,229 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2796 transitions. [2021-06-05 21:03:31,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:03:31,231 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:31,231 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:31,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 21:03:31,231 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:31,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:31,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1545690414, now seen corresponding path program 2 times [2021-06-05 21:03:31,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:31,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909053476] [2021-06-05 21:03:31,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:31,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:31,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909053476] [2021-06-05 21:03:31,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909053476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:31,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727950643] [2021-06-05 21:03:31,256 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) [2021-06-05 21:03:31,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:03:31,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:31,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:03:31,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:31,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727950643] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:03:31,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 21:03:31,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2021-06-05 21:03:31,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098339715] [2021-06-05 21:03:31,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:03:31,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:31,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:03:31,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:31,395 INFO L87 Difference]: Start difference. First operand 810 states and 2796 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:31,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:31,536 INFO L93 Difference]: Finished difference Result 1377 states and 4559 transitions. [2021-06-05 21:03:31,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:03:31,536 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:03:31,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:31,541 INFO L225 Difference]: With dead ends: 1377 [2021-06-05 21:03:31,541 INFO L226 Difference]: Without dead ends: 1220 [2021-06-05 21:03:31,542 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 109.7ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:03:31,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2021-06-05 21:03:31,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 804. [2021-06-05 21:03:31,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.460772104607721) internal successors, (2779), 803 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:31,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2779 transitions. [2021-06-05 21:03:31,559 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2779 transitions. Word has length 18 [2021-06-05 21:03:31,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:31,559 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2779 transitions. [2021-06-05 21:03:31,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:31,559 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2779 transitions. [2021-06-05 21:03:31,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:03:31,561 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:31,561 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:31,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:31,779 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:31,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:31,780 INFO L82 PathProgramCache]: Analyzing trace with hash -678642568, now seen corresponding path program 3 times [2021-06-05 21:03:31,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:31,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072559280] [2021-06-05 21:03:31,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:31,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:31,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072559280] [2021-06-05 21:03:31,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072559280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:31,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589819232] [2021-06-05 21:03:31,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:31,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:03:31,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:31,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:03:31,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:31,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:31,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589819232] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:03:31,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 21:03:31,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2021-06-05 21:03:31,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506009817] [2021-06-05 21:03:31,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 21:03:31,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:31,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 21:03:31,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:31,950 INFO L87 Difference]: Start difference. First operand 804 states and 2779 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:32,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:32,113 INFO L93 Difference]: Finished difference Result 1697 states and 5759 transitions. [2021-06-05 21:03:32,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:03:32,113 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:03:32,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:32,120 INFO L225 Difference]: With dead ends: 1697 [2021-06-05 21:03:32,120 INFO L226 Difference]: Without dead ends: 1614 [2021-06-05 21:03:32,120 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 112.9ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:03:32,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-06-05 21:03:32,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 817. [2021-06-05 21:03:32,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 3.450980392156863) internal successors, (2816), 816 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:32,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 2816 transitions. [2021-06-05 21:03:32,142 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 2816 transitions. Word has length 18 [2021-06-05 21:03:32,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:32,142 INFO L482 AbstractCegarLoop]: Abstraction has 817 states and 2816 transitions. [2021-06-05 21:03:32,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:32,142 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 2816 transitions. [2021-06-05 21:03:32,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:03:32,144 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:32,144 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:32,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:32,361 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:32,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:32,361 INFO L82 PathProgramCache]: Analyzing trace with hash -437071600, now seen corresponding path program 4 times [2021-06-05 21:03:32,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:32,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436101118] [2021-06-05 21:03:32,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:32,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:32,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436101118] [2021-06-05 21:03:32,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436101118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:32,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950363360] [2021-06-05 21:03:32,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:32,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:03:32,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:32,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:03:32,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:32,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:32,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950363360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:32,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:32,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-05 21:03:32,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25869010] [2021-06-05 21:03:32,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:03:32,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:32,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:03:32,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:03:32,483 INFO L87 Difference]: Start difference. First operand 817 states and 2816 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2021-06-05 21:03:32,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:32,587 INFO L93 Difference]: Finished difference Result 1418 states and 4750 transitions. [2021-06-05 21:03:32,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:03:32,588 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 18 [2021-06-05 21:03:32,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:32,592 INFO L225 Difference]: With dead ends: 1418 [2021-06-05 21:03:32,592 INFO L226 Difference]: Without dead ends: 1116 [2021-06-05 21:03:32,592 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:03:32,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-06-05 21:03:32,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 707. [2021-06-05 21:03:32,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 3.4674220963172804) internal successors, (2448), 706 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:32,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2448 transitions. [2021-06-05 21:03:32,607 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2448 transitions. Word has length 18 [2021-06-05 21:03:32,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:32,607 INFO L482 AbstractCegarLoop]: Abstraction has 707 states and 2448 transitions. [2021-06-05 21:03:32,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2021-06-05 21:03:32,607 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2448 transitions. [2021-06-05 21:03:32,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:03:32,608 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:32,608 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] [2021-06-05 21:03:32,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:32,824 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:32,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:32,825 INFO L82 PathProgramCache]: Analyzing trace with hash -517394769, now seen corresponding path program 1 times [2021-06-05 21:03:32,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:32,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721797201] [2021-06-05 21:03:32,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:32,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:32,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:32,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:32,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721797201] [2021-06-05 21:03:32,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721797201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:32,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525771971] [2021-06-05 21:03:32,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:32,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:32,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:03:32,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:32,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:03:32,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:03:32,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:03:32,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:03:32,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-06-05 21:03:32,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:32,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525771971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:32,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:32,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 21:03:32,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077858980] [2021-06-05 21:03:32,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:32,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:32,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:32,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:32,975 INFO L87 Difference]: Start difference. First operand 707 states and 2448 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:33,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:33,785 INFO L93 Difference]: Finished difference Result 3825 states and 12801 transitions. [2021-06-05 21:03:33,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:03:33,785 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:03:33,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:33,799 INFO L225 Difference]: With dead ends: 3825 [2021-06-05 21:03:33,799 INFO L226 Difference]: Without dead ends: 3619 [2021-06-05 21:03:33,799 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 485.8ms TimeCoverageRelationStatistics Valid=232, Invalid=698, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:03:33,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2021-06-05 21:03:33,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 1302. [2021-06-05 21:03:33,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 3.6541122213681785) internal successors, (4754), 1301 states have internal predecessors, (4754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:33,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 4754 transitions. [2021-06-05 21:03:33,840 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 4754 transitions. Word has length 21 [2021-06-05 21:03:33,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:33,840 INFO L482 AbstractCegarLoop]: Abstraction has 1302 states and 4754 transitions. [2021-06-05 21:03:33,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:33,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 4754 transitions. [2021-06-05 21:03:33,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:03:33,842 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:33,842 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] [2021-06-05 21:03:34,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:34,060 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:34,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:34,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1831057363, now seen corresponding path program 1 times [2021-06-05 21:03:34,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:34,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157033133] [2021-06-05 21:03:34,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:34,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:34,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:34,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157033133] [2021-06-05 21:03:34,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157033133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:34,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614623698] [2021-06-05 21:03:34,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:34,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:34,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:03:34,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:34,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614623698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:34,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:34,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 21:03:34,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360371013] [2021-06-05 21:03:34,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:34,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:34,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:34,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:34,188 INFO L87 Difference]: Start difference. First operand 1302 states and 4754 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:34,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:34,862 INFO L93 Difference]: Finished difference Result 3835 states and 12901 transitions. [2021-06-05 21:03:34,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:03:34,862 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:03:34,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:34,875 INFO L225 Difference]: With dead ends: 3835 [2021-06-05 21:03:34,875 INFO L226 Difference]: Without dead ends: 3583 [2021-06-05 21:03:34,876 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 424.3ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:03:34,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3583 states. [2021-06-05 21:03:34,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3583 to 1499. [2021-06-05 21:03:34,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 3.6348464619492655) internal successors, (5445), 1498 states have internal predecessors, (5445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:34,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 5445 transitions. [2021-06-05 21:03:34,922 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 5445 transitions. Word has length 21 [2021-06-05 21:03:34,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:34,922 INFO L482 AbstractCegarLoop]: Abstraction has 1499 states and 5445 transitions. [2021-06-05 21:03:34,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:34,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 5445 transitions. [2021-06-05 21:03:34,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:03:34,925 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:34,925 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] [2021-06-05 21:03:35,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 21:03:35,138 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:35,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:35,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1851685711, now seen corresponding path program 2 times [2021-06-05 21:03:35,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:35,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372236040] [2021-06-05 21:03:35,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:35,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:35,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:35,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372236040] [2021-06-05 21:03:35,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372236040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:35,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884832045] [2021-06-05 21:03:35,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:35,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:03:35,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:35,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:03:35,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:35,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:35,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884832045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:35,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:35,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-06-05 21:03:35,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398087908] [2021-06-05 21:03:35,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:03:35,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:35,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:03:35,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:03:35,261 INFO L87 Difference]: Start difference. First operand 1499 states and 5445 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:35,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:35,429 INFO L93 Difference]: Finished difference Result 2934 states and 10298 transitions. [2021-06-05 21:03:35,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:03:35,429 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:03:35,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:35,438 INFO L225 Difference]: With dead ends: 2934 [2021-06-05 21:03:35,438 INFO L226 Difference]: Without dead ends: 2934 [2021-06-05 21:03:35,439 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:03:35,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-06-05 21:03:35,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 1307. [2021-06-05 21:03:35,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1306 states have (on average 3.627105666156202) internal successors, (4737), 1306 states have internal predecessors, (4737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:35,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 4737 transitions. [2021-06-05 21:03:35,469 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 4737 transitions. Word has length 21 [2021-06-05 21:03:35,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:35,469 INFO L482 AbstractCegarLoop]: Abstraction has 1307 states and 4737 transitions. [2021-06-05 21:03:35,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:35,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 4737 transitions. [2021-06-05 21:03:35,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:03:35,471 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:35,471 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] [2021-06-05 21:03:35,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 21:03:35,685 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:35,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:35,685 INFO L82 PathProgramCache]: Analyzing trace with hash 801774587, now seen corresponding path program 3 times [2021-06-05 21:03:35,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:35,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654653422] [2021-06-05 21:03:35,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:35,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:35,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:35,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:35,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654653422] [2021-06-05 21:03:35,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654653422] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:03:35,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:03:35,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:03:35,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525694223] [2021-06-05 21:03:35,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:03:35,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:35,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:03:35,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:03:35,706 INFO L87 Difference]: Start difference. First operand 1307 states and 4737 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:35,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:35,767 INFO L93 Difference]: Finished difference Result 2081 states and 7468 transitions. [2021-06-05 21:03:35,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:03:35,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:03:35,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:35,784 INFO L225 Difference]: With dead ends: 2081 [2021-06-05 21:03:35,785 INFO L226 Difference]: Without dead ends: 2063 [2021-06-05 21:03:35,785 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:03:35,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-06-05 21:03:35,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1303. [2021-06-05 21:03:35,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1302 states have (on average 3.6267281105990783) internal successors, (4722), 1302 states have internal predecessors, (4722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:35,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 4722 transitions. [2021-06-05 21:03:35,809 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 4722 transitions. Word has length 21 [2021-06-05 21:03:35,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:35,810 INFO L482 AbstractCegarLoop]: Abstraction has 1303 states and 4722 transitions. [2021-06-05 21:03:35,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:35,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 4722 transitions. [2021-06-05 21:03:35,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:03:35,813 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:35,813 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] [2021-06-05 21:03:35,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 21:03:35,813 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:35,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:35,814 INFO L82 PathProgramCache]: Analyzing trace with hash -2028027159, now seen corresponding path program 2 times [2021-06-05 21:03:35,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:35,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398143257] [2021-06-05 21:03:35,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:35,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:35,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:35,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398143257] [2021-06-05 21:03:35,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398143257] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:03:35,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:03:35,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:03:35,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153360832] [2021-06-05 21:03:35,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:03:35,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:35,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:03:35,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:03:35,844 INFO L87 Difference]: Start difference. First operand 1303 states and 4722 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:35,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:35,940 INFO L93 Difference]: Finished difference Result 2051 states and 7360 transitions. [2021-06-05 21:03:35,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:03:35,940 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:03:35,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:35,945 INFO L225 Difference]: With dead ends: 2051 [2021-06-05 21:03:35,945 INFO L226 Difference]: Without dead ends: 2045 [2021-06-05 21:03:35,945 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:03:35,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2021-06-05 21:03:35,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1327. [2021-06-05 21:03:35,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1326 states have (on average 3.6093514328808447) internal successors, (4786), 1326 states have internal predecessors, (4786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:35,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 4786 transitions. [2021-06-05 21:03:35,968 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 4786 transitions. Word has length 21 [2021-06-05 21:03:35,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:35,968 INFO L482 AbstractCegarLoop]: Abstraction has 1327 states and 4786 transitions. [2021-06-05 21:03:35,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:35,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 4786 transitions. [2021-06-05 21:03:35,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:03:35,971 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:35,971 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] [2021-06-05 21:03:35,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 21:03:35,971 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:35,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:35,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1122312109, now seen corresponding path program 4 times [2021-06-05 21:03:35,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:35,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678202313] [2021-06-05 21:03:35,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:35,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:36,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:36,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:36,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678202313] [2021-06-05 21:03:36,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678202313] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:03:36,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:03:36,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:03:36,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383838528] [2021-06-05 21:03:36,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:03:36,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:36,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:03:36,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:03:36,001 INFO L87 Difference]: Start difference. First operand 1327 states and 4786 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:36,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:36,058 INFO L93 Difference]: Finished difference Result 1854 states and 6806 transitions. [2021-06-05 21:03:36,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:03:36,058 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:03:36,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:36,062 INFO L225 Difference]: With dead ends: 1854 [2021-06-05 21:03:36,062 INFO L226 Difference]: Without dead ends: 1840 [2021-06-05 21:03:36,062 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:03:36,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-06-05 21:03:36,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1265. [2021-06-05 21:03:36,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 3.6360759493670884) internal successors, (4596), 1264 states have internal predecessors, (4596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:36,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 4596 transitions. [2021-06-05 21:03:36,083 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 4596 transitions. Word has length 21 [2021-06-05 21:03:36,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:36,083 INFO L482 AbstractCegarLoop]: Abstraction has 1265 states and 4596 transitions. [2021-06-05 21:03:36,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:36,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 4596 transitions. [2021-06-05 21:03:36,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:03:36,085 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:36,085 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:36,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 21:03:36,086 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:36,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:36,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1455380781, now seen corresponding path program 1 times [2021-06-05 21:03:36,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:36,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700804671] [2021-06-05 21:03:36,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:36,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:36,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:36,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700804671] [2021-06-05 21:03:36,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700804671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:36,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369938720] [2021-06-05 21:03:36,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-05 21:03:36,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:36,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:03:36,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:36,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369938720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:36,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:36,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:03:36,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108996510] [2021-06-05 21:03:36,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:03:36,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:36,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:03:36,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:03:36,261 INFO L87 Difference]: Start difference. First operand 1265 states and 4596 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:36,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:36,571 INFO L93 Difference]: Finished difference Result 3756 states and 13001 transitions. [2021-06-05 21:03:36,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:03:36,572 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:03:36,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:36,578 INFO L225 Difference]: With dead ends: 3756 [2021-06-05 21:03:36,578 INFO L226 Difference]: Without dead ends: 3032 [2021-06-05 21:03:36,578 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 217.9ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:03:36,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-06-05 21:03:36,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 2042. [2021-06-05 21:03:36,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2042 states, 2041 states have (on average 3.724154826065654) internal successors, (7601), 2041 states have internal predecessors, (7601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:36,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2042 states to 2042 states and 7601 transitions. [2021-06-05 21:03:36,616 INFO L78 Accepts]: Start accepts. Automaton has 2042 states and 7601 transitions. Word has length 24 [2021-06-05 21:03:36,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:36,616 INFO L482 AbstractCegarLoop]: Abstraction has 2042 states and 7601 transitions. [2021-06-05 21:03:36,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:36,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2042 states and 7601 transitions. [2021-06-05 21:03:36,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:03:36,620 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:36,620 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:36,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 21:03:36,835 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:36,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:36,835 INFO L82 PathProgramCache]: Analyzing trace with hash 2096711821, now seen corresponding path program 2 times [2021-06-05 21:03:36,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:36,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005048205] [2021-06-05 21:03:36,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:36,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:36,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005048205] [2021-06-05 21:03:36,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005048205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:36,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499525086] [2021-06-05 21:03:36,882 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 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 [2021-06-05 21:03:36,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:03:36,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:36,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:03:36,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:37,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:37,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499525086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:37,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:37,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:03:37,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463387786] [2021-06-05 21:03:37,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:03:37,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:37,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:03:37,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:03:37,033 INFO L87 Difference]: Start difference. First operand 2042 states and 7601 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:37,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:37,325 INFO L93 Difference]: Finished difference Result 3819 states and 13270 transitions. [2021-06-05 21:03:37,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:03:37,325 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:03:37,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:37,333 INFO L225 Difference]: With dead ends: 3819 [2021-06-05 21:03:37,333 INFO L226 Difference]: Without dead ends: 3419 [2021-06-05 21:03:37,333 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 180.9ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:03:37,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3419 states. [2021-06-05 21:03:37,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3419 to 2196. [2021-06-05 21:03:37,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 3.7599088838268795) internal successors, (8253), 2195 states have internal predecessors, (8253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:37,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 8253 transitions. [2021-06-05 21:03:37,378 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 8253 transitions. Word has length 24 [2021-06-05 21:03:37,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:37,378 INFO L482 AbstractCegarLoop]: Abstraction has 2196 states and 8253 transitions. [2021-06-05 21:03:37,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:37,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 8253 transitions. [2021-06-05 21:03:37,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:03:37,383 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:37,383 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:37,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 21:03:37,602 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:37,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:37,602 INFO L82 PathProgramCache]: Analyzing trace with hash -337245367, now seen corresponding path program 3 times [2021-06-05 21:03:37,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:37,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234741402] [2021-06-05 21:03:37,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:37,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:37,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:37,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234741402] [2021-06-05 21:03:37,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234741402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:37,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415402874] [2021-06-05 21:03:37,658 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 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 [2021-06-05 21:03:37,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:03:37,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:37,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:03:37,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:37,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415402874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:37,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:37,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:03:37,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787549031] [2021-06-05 21:03:37,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:03:37,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:37,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:03:37,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:03:37,781 INFO L87 Difference]: Start difference. First operand 2196 states and 8253 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:38,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:38,143 INFO L93 Difference]: Finished difference Result 4185 states and 15168 transitions. [2021-06-05 21:03:38,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:03:38,143 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:03:38,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:38,150 INFO L225 Difference]: With dead ends: 4185 [2021-06-05 21:03:38,151 INFO L226 Difference]: Without dead ends: 3585 [2021-06-05 21:03:38,151 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 215.8ms TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:03:38,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3585 states. [2021-06-05 21:03:38,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3585 to 2406. [2021-06-05 21:03:38,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2406 states, 2405 states have (on average 3.761330561330561) internal successors, (9046), 2405 states have internal predecessors, (9046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:38,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 9046 transitions. [2021-06-05 21:03:38,227 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 9046 transitions. Word has length 24 [2021-06-05 21:03:38,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:38,227 INFO L482 AbstractCegarLoop]: Abstraction has 2406 states and 9046 transitions. [2021-06-05 21:03:38,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:38,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 9046 transitions. [2021-06-05 21:03:38,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:03:38,232 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:38,232 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:38,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 21:03:38,447 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:38,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:38,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1257907469, now seen corresponding path program 1 times [2021-06-05 21:03:38,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:38,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279194520] [2021-06-05 21:03:38,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:38,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:38,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:38,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:38,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279194520] [2021-06-05 21:03:38,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279194520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:38,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214762634] [2021-06-05 21:03:38,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:38,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:38,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:03:38,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:38,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:03:38,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:03:38,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:03:38,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:03:38,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 21:03:38,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:38,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214762634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:38,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:38,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 21:03:38,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692130847] [2021-06-05 21:03:38,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:38,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:38,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:38,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:38,591 INFO L87 Difference]: Start difference. First operand 2406 states and 9046 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:38,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:38,781 INFO L93 Difference]: Finished difference Result 4184 states and 14954 transitions. [2021-06-05 21:03:38,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:03:38,781 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:03:38,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:38,788 INFO L225 Difference]: With dead ends: 4184 [2021-06-05 21:03:38,788 INFO L226 Difference]: Without dead ends: 3609 [2021-06-05 21:03:38,788 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:03:38,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3609 states. [2021-06-05 21:03:38,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3609 to 2825. [2021-06-05 21:03:38,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2825 states, 2824 states have (on average 3.685198300283286) internal successors, (10407), 2824 states have internal predecessors, (10407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:38,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 10407 transitions. [2021-06-05 21:03:38,832 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 10407 transitions. Word has length 24 [2021-06-05 21:03:38,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:38,832 INFO L482 AbstractCegarLoop]: Abstraction has 2825 states and 10407 transitions. [2021-06-05 21:03:38,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:38,832 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 10407 transitions. [2021-06-05 21:03:38,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:03:38,838 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:38,838 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:39,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 21:03:39,052 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:39,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:39,052 INFO L82 PathProgramCache]: Analyzing trace with hash -37818295, now seen corresponding path program 2 times [2021-06-05 21:03:39,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:39,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099245851] [2021-06-05 21:03:39,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:39,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:39,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099245851] [2021-06-05 21:03:39,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099245851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:39,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997346178] [2021-06-05 21:03:39,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:39,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:03:39,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:39,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:03:39,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:39,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:03:39,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:03:39,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:03:39,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:03:39,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 21:03:39,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:39,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997346178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:39,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:39,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 21:03:39,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796625345] [2021-06-05 21:03:39,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:39,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:39,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:39,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:39,180 INFO L87 Difference]: Start difference. First operand 2825 states and 10407 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:39,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:39,366 INFO L93 Difference]: Finished difference Result 4952 states and 17662 transitions. [2021-06-05 21:03:39,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:03:39,366 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:03:39,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:39,374 INFO L225 Difference]: With dead ends: 4952 [2021-06-05 21:03:39,374 INFO L226 Difference]: Without dead ends: 4907 [2021-06-05 21:03:39,374 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 102.7ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:03:39,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4907 states. [2021-06-05 21:03:39,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4907 to 3559. [2021-06-05 21:03:39,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3559 states, 3558 states have (on average 3.7141652613827993) internal successors, (13215), 3558 states have internal predecessors, (13215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:39,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3559 states to 3559 states and 13215 transitions. [2021-06-05 21:03:39,461 INFO L78 Accepts]: Start accepts. Automaton has 3559 states and 13215 transitions. Word has length 24 [2021-06-05 21:03:39,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:39,461 INFO L482 AbstractCegarLoop]: Abstraction has 3559 states and 13215 transitions. [2021-06-05 21:03:39,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:39,462 INFO L276 IsEmpty]: Start isEmpty. Operand 3559 states and 13215 transitions. [2021-06-05 21:03:39,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:03:39,468 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:39,468 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:39,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:39,668 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:39,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:39,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1702471575, now seen corresponding path program 1 times [2021-06-05 21:03:39,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:39,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721118814] [2021-06-05 21:03:39,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:39,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:39,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:39,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721118814] [2021-06-05 21:03:39,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721118814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:39,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923683507] [2021-06-05 21:03:39,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:39,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:39,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:03:39,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:39,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:39,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923683507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:39,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:39,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:03:39,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529300315] [2021-06-05 21:03:39,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:03:39,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:39,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:03:39,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:03:39,960 INFO L87 Difference]: Start difference. First operand 3559 states and 13215 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:40,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:40,180 INFO L93 Difference]: Finished difference Result 4119 states and 14931 transitions. [2021-06-05 21:03:40,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:03:40,181 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:03:40,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:40,186 INFO L225 Difference]: With dead ends: 4119 [2021-06-05 21:03:40,187 INFO L226 Difference]: Without dead ends: 3762 [2021-06-05 21:03:40,187 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 199.8ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:03:40,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3762 states. [2021-06-05 21:03:40,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3762 to 3576. [2021-06-05 21:03:40,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3576 states, 3575 states have (on average 3.7023776223776226) internal successors, (13236), 3575 states have internal predecessors, (13236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:40,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3576 states to 3576 states and 13236 transitions. [2021-06-05 21:03:40,235 INFO L78 Accepts]: Start accepts. Automaton has 3576 states and 13236 transitions. Word has length 24 [2021-06-05 21:03:40,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:40,235 INFO L482 AbstractCegarLoop]: Abstraction has 3576 states and 13236 transitions. [2021-06-05 21:03:40,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:40,235 INFO L276 IsEmpty]: Start isEmpty. Operand 3576 states and 13236 transitions. [2021-06-05 21:03:40,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:03:40,241 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:40,241 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:40,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:40,457 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:40,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:40,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1483062673, now seen corresponding path program 2 times [2021-06-05 21:03:40,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:40,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671200300] [2021-06-05 21:03:40,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:40,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:40,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671200300] [2021-06-05 21:03:40,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671200300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:40,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386579922] [2021-06-05 21:03:40,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:40,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:03:40,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:40,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:03:40,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:40,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:40,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386579922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:40,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:40,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:03:40,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538885964] [2021-06-05 21:03:40,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:03:40,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:40,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:03:40,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:03:40,704 INFO L87 Difference]: Start difference. First operand 3576 states and 13236 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:40,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:40,953 INFO L93 Difference]: Finished difference Result 4175 states and 15081 transitions. [2021-06-05 21:03:40,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:03:40,953 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:03:40,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:40,958 INFO L225 Difference]: With dead ends: 4175 [2021-06-05 21:03:40,958 INFO L226 Difference]: Without dead ends: 3615 [2021-06-05 21:03:40,958 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 214.7ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:03:40,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3615 states. [2021-06-05 21:03:40,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3615 to 3429. [2021-06-05 21:03:40,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3428 states have (on average 3.731330221703617) internal successors, (12791), 3428 states have internal predecessors, (12791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:41,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 12791 transitions. [2021-06-05 21:03:41,001 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 12791 transitions. Word has length 24 [2021-06-05 21:03:41,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:41,001 INFO L482 AbstractCegarLoop]: Abstraction has 3429 states and 12791 transitions. [2021-06-05 21:03:41,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:41,001 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 12791 transitions. [2021-06-05 21:03:41,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:03:41,007 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:41,007 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:41,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 21:03:41,221 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:41,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:41,221 INFO L82 PathProgramCache]: Analyzing trace with hash -712088919, now seen corresponding path program 1 times [2021-06-05 21:03:41,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:41,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271136022] [2021-06-05 21:03:41,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:41,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:41,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:41,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271136022] [2021-06-05 21:03:41,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271136022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:41,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124181744] [2021-06-05 21:03:41,291 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2021-06-05 21:03:41,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:41,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:03:41,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:41,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124181744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:41,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:41,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 21:03:41,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45887138] [2021-06-05 21:03:41,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:03:41,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:41,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:03:41,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:03:41,404 INFO L87 Difference]: Start difference. First operand 3429 states and 12791 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:41,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:41,687 INFO L93 Difference]: Finished difference Result 4987 states and 17858 transitions. [2021-06-05 21:03:41,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:03:41,687 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:03:41,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:41,693 INFO L225 Difference]: With dead ends: 4987 [2021-06-05 21:03:41,693 INFO L226 Difference]: Without dead ends: 3821 [2021-06-05 21:03:41,693 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 201.3ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:03:41,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3821 states. [2021-06-05 21:03:41,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3821 to 3319. [2021-06-05 21:03:41,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3319 states, 3318 states have (on average 3.648583484026522) internal successors, (12106), 3318 states have internal predecessors, (12106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:41,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3319 states to 3319 states and 12106 transitions. [2021-06-05 21:03:41,740 INFO L78 Accepts]: Start accepts. Automaton has 3319 states and 12106 transitions. Word has length 24 [2021-06-05 21:03:41,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:41,740 INFO L482 AbstractCegarLoop]: Abstraction has 3319 states and 12106 transitions. [2021-06-05 21:03:41,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:41,740 INFO L276 IsEmpty]: Start isEmpty. Operand 3319 states and 12106 transitions. [2021-06-05 21:03:41,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:03:41,745 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:41,745 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:41,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:41,961 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:41,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:41,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1948181261, now seen corresponding path program 1 times [2021-06-05 21:03:41,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:41,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498666887] [2021-06-05 21:03:41,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:41,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:42,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:42,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498666887] [2021-06-05 21:03:42,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498666887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:42,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541316064] [2021-06-05 21:03:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-05 21:03:42,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:42,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:03:42,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:42,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:03:42,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:03:42,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:03:42,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:03:42,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-06-05 21:03:42,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:42,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541316064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:42,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:42,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-06-05 21:03:42,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975670411] [2021-06-05 21:03:42,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:03:42,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:42,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:03:42,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:42,135 INFO L87 Difference]: Start difference. First operand 3319 states and 12106 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:42,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:42,339 INFO L93 Difference]: Finished difference Result 4339 states and 15458 transitions. [2021-06-05 21:03:42,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:03:42,340 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:03:42,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:42,347 INFO L225 Difference]: With dead ends: 4339 [2021-06-05 21:03:42,347 INFO L226 Difference]: Without dead ends: 4198 [2021-06-05 21:03:42,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 144.1ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:03:42,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4198 states. [2021-06-05 21:03:42,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4198 to 3613. [2021-06-05 21:03:42,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 3612 states have (on average 3.638704318936877) internal successors, (13143), 3612 states have internal predecessors, (13143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:42,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 13143 transitions. [2021-06-05 21:03:42,407 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 13143 transitions. Word has length 24 [2021-06-05 21:03:42,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:42,407 INFO L482 AbstractCegarLoop]: Abstraction has 3613 states and 13143 transitions. [2021-06-05 21:03:42,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:42,407 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 13143 transitions. [2021-06-05 21:03:42,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:03:42,413 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:42,413 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:42,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 21:03:42,629 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:42,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:42,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1874823949, now seen corresponding path program 3 times [2021-06-05 21:03:42,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:42,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241481175] [2021-06-05 21:03:42,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:42,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:42,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:42,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241481175] [2021-06-05 21:03:42,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241481175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:42,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924712223] [2021-06-05 21:03:42,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:42,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:03:42,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:42,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:03:42,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:42,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:03:42,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:03:42,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:03:42,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:03:42,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 21:03:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:42,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924712223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:42,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:42,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 21:03:42,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521939501] [2021-06-05 21:03:42,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:42,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:42,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:42,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:42,781 INFO L87 Difference]: Start difference. First operand 3613 states and 13143 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:42,968 INFO L93 Difference]: Finished difference Result 4148 states and 14673 transitions. [2021-06-05 21:03:42,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:03:42,968 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:03:42,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:42,974 INFO L225 Difference]: With dead ends: 4148 [2021-06-05 21:03:42,975 INFO L226 Difference]: Without dead ends: 3464 [2021-06-05 21:03:42,975 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:03:42,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2021-06-05 21:03:43,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 3015. [2021-06-05 21:03:43,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3015 states, 3014 states have (on average 3.6250829462508296) internal successors, (10926), 3014 states have internal predecessors, (10926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:43,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3015 states to 3015 states and 10926 transitions. [2021-06-05 21:03:43,016 INFO L78 Accepts]: Start accepts. Automaton has 3015 states and 10926 transitions. Word has length 24 [2021-06-05 21:03:43,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:43,017 INFO L482 AbstractCegarLoop]: Abstraction has 3015 states and 10926 transitions. [2021-06-05 21:03:43,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:43,017 INFO L276 IsEmpty]: Start isEmpty. Operand 3015 states and 10926 transitions. [2021-06-05 21:03:43,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:03:43,021 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:43,021 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:43,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 21:03:43,237 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:43,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:43,237 INFO L82 PathProgramCache]: Analyzing trace with hash -853710037, now seen corresponding path program 4 times [2021-06-05 21:03:43,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:43,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548007974] [2021-06-05 21:03:43,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:43,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:43,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:43,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:43,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548007974] [2021-06-05 21:03:43,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548007974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:43,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127836798] [2021-06-05 21:03:43,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:43,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:03:43,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:43,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:03:43,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:43,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:03:43,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:03:43,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:03:43,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:03:43,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-06-05 21:03:43,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:43,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127836798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:43,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:43,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-06-05 21:03:43,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837561322] [2021-06-05 21:03:43,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:03:43,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:43,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:03:43,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:43,366 INFO L87 Difference]: Start difference. First operand 3015 states and 10926 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:43,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:43,559 INFO L93 Difference]: Finished difference Result 3294 states and 11794 transitions. [2021-06-05 21:03:43,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:03:43,560 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:03:43,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:43,565 INFO L225 Difference]: With dead ends: 3294 [2021-06-05 21:03:43,565 INFO L226 Difference]: Without dead ends: 3294 [2021-06-05 21:03:43,565 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:03:43,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3294 states. [2021-06-05 21:03:43,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3294 to 3106. [2021-06-05 21:03:43,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3106 states, 3105 states have (on average 3.61256038647343) internal successors, (11217), 3105 states have internal predecessors, (11217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:43,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3106 states to 3106 states and 11217 transitions. [2021-06-05 21:03:43,615 INFO L78 Accepts]: Start accepts. Automaton has 3106 states and 11217 transitions. Word has length 24 [2021-06-05 21:03:43,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:43,615 INFO L482 AbstractCegarLoop]: Abstraction has 3106 states and 11217 transitions. [2021-06-05 21:03:43,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:43,616 INFO L276 IsEmpty]: Start isEmpty. Operand 3106 states and 11217 transitions. [2021-06-05 21:03:43,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:03:43,620 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:43,620 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:43,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 21:03:43,821 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:43,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:43,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1540696521, now seen corresponding path program 5 times [2021-06-05 21:03:43,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:43,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357780577] [2021-06-05 21:03:43,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:43,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:43,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:43,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357780577] [2021-06-05 21:03:43,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357780577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:43,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723650591] [2021-06-05 21:03:43,864 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 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 [2021-06-05 21:03:43,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:03:43,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:43,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:03:43,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:43,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:03:43,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:03:43,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:03:43,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:03:43,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 21:03:43,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:43,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723650591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:43,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:43,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 21:03:43,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841159411] [2021-06-05 21:03:43,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:43,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:43,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:43,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:43,950 INFO L87 Difference]: Start difference. First operand 3106 states and 11217 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:44,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:44,150 INFO L93 Difference]: Finished difference Result 4306 states and 15126 transitions. [2021-06-05 21:03:44,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:03:44,151 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:03:44,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:44,157 INFO L225 Difference]: With dead ends: 4306 [2021-06-05 21:03:44,157 INFO L226 Difference]: Without dead ends: 4306 [2021-06-05 21:03:44,157 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:03:44,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4306 states. [2021-06-05 21:03:44,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4306 to 3262. [2021-06-05 21:03:44,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3262 states, 3261 states have (on average 3.609015639374425) internal successors, (11769), 3261 states have internal predecessors, (11769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:44,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3262 states to 3262 states and 11769 transitions. [2021-06-05 21:03:44,199 INFO L78 Accepts]: Start accepts. Automaton has 3262 states and 11769 transitions. Word has length 24 [2021-06-05 21:03:44,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:44,199 INFO L482 AbstractCegarLoop]: Abstraction has 3262 states and 11769 transitions. [2021-06-05 21:03:44,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:44,200 INFO L276 IsEmpty]: Start isEmpty. Operand 3262 states and 11769 transitions. [2021-06-05 21:03:44,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:03:44,204 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:44,204 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:44,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 21:03:44,405 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:44,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:44,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1089617495, now seen corresponding path program 3 times [2021-06-05 21:03:44,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:44,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66557192] [2021-06-05 21:03:44,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:44,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:44,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:44,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:44,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66557192] [2021-06-05 21:03:44,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66557192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:44,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799485536] [2021-06-05 21:03:44,533 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 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 [2021-06-05 21:03:44,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:03:44,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:44,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:03:44,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:44,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799485536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:44,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:44,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:03:44,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534055780] [2021-06-05 21:03:44,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:03:44,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:44,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:03:44,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:03:44,686 INFO L87 Difference]: Start difference. First operand 3262 states and 11769 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:44,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:44,957 INFO L93 Difference]: Finished difference Result 3881 states and 13726 transitions. [2021-06-05 21:03:44,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:03:44,958 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:03:44,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:44,963 INFO L225 Difference]: With dead ends: 3881 [2021-06-05 21:03:44,963 INFO L226 Difference]: Without dead ends: 3516 [2021-06-05 21:03:44,964 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 250.6ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:03:44,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3516 states. [2021-06-05 21:03:44,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3516 to 3289. [2021-06-05 21:03:44,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3289 states, 3288 states have (on average 3.602493917274939) internal successors, (11845), 3288 states have internal predecessors, (11845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:45,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3289 states to 3289 states and 11845 transitions. [2021-06-05 21:03:45,027 INFO L78 Accepts]: Start accepts. Automaton has 3289 states and 11845 transitions. Word has length 24 [2021-06-05 21:03:45,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:45,027 INFO L482 AbstractCegarLoop]: Abstraction has 3289 states and 11845 transitions. [2021-06-05 21:03:45,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:45,027 INFO L276 IsEmpty]: Start isEmpty. Operand 3289 states and 11845 transitions. [2021-06-05 21:03:45,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:03:45,032 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:45,032 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:45,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 21:03:45,233 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:45,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:45,233 INFO L82 PathProgramCache]: Analyzing trace with hash 2129098641, now seen corresponding path program 6 times [2021-06-05 21:03:45,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:45,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063766752] [2021-06-05 21:03:45,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:45,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:45,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:45,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063766752] [2021-06-05 21:03:45,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063766752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:45,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089980955] [2021-06-05 21:03:45,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:45,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:03:45,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:45,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:03:45,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:45,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:03:45,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:03:45,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:03:45,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:03:45,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-06-05 21:03:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:45,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089980955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:45,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:45,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-06-05 21:03:45,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772205753] [2021-06-05 21:03:45,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:03:45,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:45,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:03:45,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:45,363 INFO L87 Difference]: Start difference. First operand 3289 states and 11845 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:45,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:45,574 INFO L93 Difference]: Finished difference Result 3630 states and 12852 transitions. [2021-06-05 21:03:45,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:03:45,574 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:03:45,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:45,579 INFO L225 Difference]: With dead ends: 3630 [2021-06-05 21:03:45,579 INFO L226 Difference]: Without dead ends: 3630 [2021-06-05 21:03:45,579 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:03:45,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3630 states. [2021-06-05 21:03:45,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3630 to 3263. [2021-06-05 21:03:45,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 3.600551808706315) internal successors, (11745), 3262 states have internal predecessors, (11745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:45,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 11745 transitions. [2021-06-05 21:03:45,621 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 11745 transitions. Word has length 24 [2021-06-05 21:03:45,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:45,621 INFO L482 AbstractCegarLoop]: Abstraction has 3263 states and 11745 transitions. [2021-06-05 21:03:45,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:45,621 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 11745 transitions. [2021-06-05 21:03:45,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:03:45,626 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:45,626 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:45,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:45,826 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:45,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:45,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1434078121, now seen corresponding path program 2 times [2021-06-05 21:03:45,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:45,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111458190] [2021-06-05 21:03:45,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:45,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:45,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:45,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111458190] [2021-06-05 21:03:45,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111458190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:45,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819026560] [2021-06-05 21:03:45,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 21:03:45,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:03:45,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:45,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:03:45,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:45,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:03:45,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:03:45,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:03:45,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:03:45,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 21:03:45,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:45,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819026560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:45,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:45,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 21:03:45,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465656362] [2021-06-05 21:03:45,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:45,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:45,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:45,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:45,989 INFO L87 Difference]: Start difference. First operand 3263 states and 11745 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:46,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:46,158 INFO L93 Difference]: Finished difference Result 3854 states and 13464 transitions. [2021-06-05 21:03:46,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:03:46,158 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:03:46,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:46,163 INFO L225 Difference]: With dead ends: 3854 [2021-06-05 21:03:46,164 INFO L226 Difference]: Without dead ends: 3810 [2021-06-05 21:03:46,164 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 138.2ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:03:46,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3810 states. [2021-06-05 21:03:46,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3810 to 3156. [2021-06-05 21:03:46,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3156 states, 3155 states have (on average 3.5984152139461174) internal successors, (11353), 3155 states have internal predecessors, (11353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:46,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3156 states to 3156 states and 11353 transitions. [2021-06-05 21:03:46,203 INFO L78 Accepts]: Start accepts. Automaton has 3156 states and 11353 transitions. Word has length 24 [2021-06-05 21:03:46,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:46,203 INFO L482 AbstractCegarLoop]: Abstraction has 3156 states and 11353 transitions. [2021-06-05 21:03:46,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:46,203 INFO L276 IsEmpty]: Start isEmpty. Operand 3156 states and 11353 transitions. [2021-06-05 21:03:46,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:03:46,208 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:46,208 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:46,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 21:03:46,414 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:46,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:46,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1862582325, now seen corresponding path program 3 times [2021-06-05 21:03:46,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:46,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962230073] [2021-06-05 21:03:46,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:46,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:46,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:46,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:46,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962230073] [2021-06-05 21:03:46,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962230073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:46,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641029283] [2021-06-05 21:03:46,450 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 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 [2021-06-05 21:03:46,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:03:46,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:46,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:03:46,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:46,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:03:46,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:03:46,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:03:46,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:03:46,514 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-06-05 21:03:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:46,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641029283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:46,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:46,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-06-05 21:03:46,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792834072] [2021-06-05 21:03:46,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:03:46,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:46,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:03:46,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:46,533 INFO L87 Difference]: Start difference. First operand 3156 states and 11353 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:46,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:46,714 INFO L93 Difference]: Finished difference Result 3384 states and 11803 transitions. [2021-06-05 21:03:46,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:03:46,714 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:03:46,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:46,719 INFO L225 Difference]: With dead ends: 3384 [2021-06-05 21:03:46,719 INFO L226 Difference]: Without dead ends: 3321 [2021-06-05 21:03:46,719 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:03:46,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2021-06-05 21:03:46,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 2530. [2021-06-05 21:03:46,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2529 states have (on average 3.593910636615263) internal successors, (9089), 2529 states have internal predecessors, (9089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:46,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 9089 transitions. [2021-06-05 21:03:46,751 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 9089 transitions. Word has length 24 [2021-06-05 21:03:46,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:46,751 INFO L482 AbstractCegarLoop]: Abstraction has 2530 states and 9089 transitions. [2021-06-05 21:03:46,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:46,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 9089 transitions. [2021-06-05 21:03:46,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:03:46,755 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:46,755 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:46,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:46,955 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:46,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:46,956 INFO L82 PathProgramCache]: Analyzing trace with hash 316647389, now seen corresponding path program 4 times [2021-06-05 21:03:46,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:46,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484249743] [2021-06-05 21:03:46,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:47,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:47,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484249743] [2021-06-05 21:03:47,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484249743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:47,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524515265] [2021-06-05 21:03:47,096 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 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 [2021-06-05 21:03:47,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:03:47,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:47,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:03:47,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:47,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:47,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524515265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:47,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:47,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:03:47,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286033676] [2021-06-05 21:03:47,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:03:47,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:47,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:03:47,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:03:47,238 INFO L87 Difference]: Start difference. First operand 2530 states and 9089 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:47,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:47,632 INFO L93 Difference]: Finished difference Result 3403 states and 11831 transitions. [2021-06-05 21:03:47,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:03:47,632 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:03:47,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:47,636 INFO L225 Difference]: With dead ends: 3403 [2021-06-05 21:03:47,636 INFO L226 Difference]: Without dead ends: 2711 [2021-06-05 21:03:47,637 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 292.6ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:03:47,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2021-06-05 21:03:47,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 2524. [2021-06-05 21:03:47,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2524 states, 2523 states have (on average 3.594926674593738) internal successors, (9070), 2523 states have internal predecessors, (9070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:47,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 9070 transitions. [2021-06-05 21:03:47,666 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 9070 transitions. Word has length 24 [2021-06-05 21:03:47,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:47,666 INFO L482 AbstractCegarLoop]: Abstraction has 2524 states and 9070 transitions. [2021-06-05 21:03:47,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:47,666 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 9070 transitions. [2021-06-05 21:03:47,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:03:47,669 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:47,670 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:47,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 21:03:47,873 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:47,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:47,873 INFO L82 PathProgramCache]: Analyzing trace with hash -2118036169, now seen corresponding path program 5 times [2021-06-05 21:03:47,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:47,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699234416] [2021-06-05 21:03:47,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:47,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:47,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:47,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:47,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699234416] [2021-06-05 21:03:47,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699234416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:47,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457208097] [2021-06-05 21:03:47,997 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 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 [2021-06-05 21:03:48,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:03:48,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:48,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:03:48,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:48,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457208097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:48,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:48,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:03:48,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484270660] [2021-06-05 21:03:48,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:03:48,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:48,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:03:48,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:03:48,131 INFO L87 Difference]: Start difference. First operand 2524 states and 9070 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:48,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:48,561 INFO L93 Difference]: Finished difference Result 3698 states and 12705 transitions. [2021-06-05 21:03:48,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:03:48,561 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:03:48,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:48,565 INFO L225 Difference]: With dead ends: 3698 [2021-06-05 21:03:48,566 INFO L226 Difference]: Without dead ends: 2495 [2021-06-05 21:03:48,566 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 319.7ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:03:48,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2021-06-05 21:03:48,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 2347. [2021-06-05 21:03:48,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 3.6027280477408357) internal successors, (8452), 2346 states have internal predecessors, (8452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:48,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 8452 transitions. [2021-06-05 21:03:48,594 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 8452 transitions. Word has length 24 [2021-06-05 21:03:48,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:48,594 INFO L482 AbstractCegarLoop]: Abstraction has 2347 states and 8452 transitions. [2021-06-05 21:03:48,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:48,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 8452 transitions. [2021-06-05 21:03:48,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:03:48,597 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:48,597 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:48,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:48,798 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:48,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:48,798 INFO L82 PathProgramCache]: Analyzing trace with hash -579383647, now seen corresponding path program 4 times [2021-06-05 21:03:48,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:48,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422407426] [2021-06-05 21:03:48,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:48,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:48,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:48,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422407426] [2021-06-05 21:03:48,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422407426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:48,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205442488] [2021-06-05 21:03:48,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:48,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:03:48,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:48,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:03:48,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:48,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:48,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205442488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:48,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:48,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 21:03:48,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281105346] [2021-06-05 21:03:48,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:03:48,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:48,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:03:48,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:48,907 INFO L87 Difference]: Start difference. First operand 2347 states and 8452 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:49,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:49,092 INFO L93 Difference]: Finished difference Result 7003 states and 24374 transitions. [2021-06-05 21:03:49,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:03:49,093 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:03:49,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:49,103 INFO L225 Difference]: With dead ends: 7003 [2021-06-05 21:03:49,103 INFO L226 Difference]: Without dead ends: 6243 [2021-06-05 21:03:49,103 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:03:49,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6243 states. [2021-06-05 21:03:49,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6243 to 3941. [2021-06-05 21:03:49,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3941 states, 3940 states have (on average 3.7758883248730966) internal successors, (14877), 3940 states have internal predecessors, (14877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:49,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3941 states to 3941 states and 14877 transitions. [2021-06-05 21:03:49,169 INFO L78 Accepts]: Start accepts. Automaton has 3941 states and 14877 transitions. Word has length 27 [2021-06-05 21:03:49,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:49,169 INFO L482 AbstractCegarLoop]: Abstraction has 3941 states and 14877 transitions. [2021-06-05 21:03:49,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:49,170 INFO L276 IsEmpty]: Start isEmpty. Operand 3941 states and 14877 transitions. [2021-06-05 21:03:49,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:03:49,175 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:49,175 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:49,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 21:03:49,375 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:49,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:49,375 INFO L82 PathProgramCache]: Analyzing trace with hash 755204605, now seen corresponding path program 1 times [2021-06-05 21:03:49,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:49,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796352838] [2021-06-05 21:03:49,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:49,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:49,422 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:49,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:49,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796352838] [2021-06-05 21:03:49,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796352838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:49,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322289649] [2021-06-05 21:03:49,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-05 21:03:49,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:49,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:03:49,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:49,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:03:49,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:03:49,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:03:49,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:03:49,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-06-05 21:03:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:49,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322289649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:49,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:49,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-06-05 21:03:49,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842555766] [2021-06-05 21:03:49,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:03:49,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:49,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:03:49,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:49,504 INFO L87 Difference]: Start difference. First operand 3941 states and 14877 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:49,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:49,637 INFO L93 Difference]: Finished difference Result 5052 states and 18543 transitions. [2021-06-05 21:03:49,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:03:49,638 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:03:49,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:49,645 INFO L225 Difference]: With dead ends: 5052 [2021-06-05 21:03:49,645 INFO L226 Difference]: Without dead ends: 4862 [2021-06-05 21:03:49,645 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:03:49,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4862 states. [2021-06-05 21:03:49,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4862 to 4231. [2021-06-05 21:03:49,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4231 states, 4230 states have (on average 3.753900709219858) internal successors, (15879), 4230 states have internal predecessors, (15879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:49,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4231 states to 4231 states and 15879 transitions. [2021-06-05 21:03:49,736 INFO L78 Accepts]: Start accepts. Automaton has 4231 states and 15879 transitions. Word has length 27 [2021-06-05 21:03:49,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:49,736 INFO L482 AbstractCegarLoop]: Abstraction has 4231 states and 15879 transitions. [2021-06-05 21:03:49,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:49,736 INFO L276 IsEmpty]: Start isEmpty. Operand 4231 states and 15879 transitions. [2021-06-05 21:03:49,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:03:49,743 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:49,743 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:49,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:49,957 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:49,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:49,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1627375381, now seen corresponding path program 5 times [2021-06-05 21:03:49,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:49,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025099633] [2021-06-05 21:03:49,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:49,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:49,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:49,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:49,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025099633] [2021-06-05 21:03:49,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025099633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:49,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543270261] [2021-06-05 21:03:49,989 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 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 [2021-06-05 21:03:50,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:03:50,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:50,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:03:50,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:50,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543270261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:50,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:50,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 21:03:50,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556594851] [2021-06-05 21:03:50,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:50,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:50,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:50,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:50,087 INFO L87 Difference]: Start difference. First operand 4231 states and 15879 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:50,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:50,226 INFO L93 Difference]: Finished difference Result 6079 states and 21441 transitions. [2021-06-05 21:03:50,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:03:50,227 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:03:50,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:50,235 INFO L225 Difference]: With dead ends: 6079 [2021-06-05 21:03:50,235 INFO L226 Difference]: Without dead ends: 5466 [2021-06-05 21:03:50,236 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:03:50,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5466 states. [2021-06-05 21:03:50,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5466 to 4109. [2021-06-05 21:03:50,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4109 states, 4108 states have (on average 3.7458617332035056) internal successors, (15388), 4108 states have internal predecessors, (15388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:50,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4109 states to 4109 states and 15388 transitions. [2021-06-05 21:03:50,294 INFO L78 Accepts]: Start accepts. Automaton has 4109 states and 15388 transitions. Word has length 27 [2021-06-05 21:03:50,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:50,294 INFO L482 AbstractCegarLoop]: Abstraction has 4109 states and 15388 transitions. [2021-06-05 21:03:50,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:50,294 INFO L276 IsEmpty]: Start isEmpty. Operand 4109 states and 15388 transitions. [2021-06-05 21:03:50,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:03:50,299 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:50,299 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:50,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 21:03:50,500 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:50,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:50,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1329916833, now seen corresponding path program 6 times [2021-06-05 21:03:50,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:50,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458534528] [2021-06-05 21:03:50,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:50,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:50,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458534528] [2021-06-05 21:03:50,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458534528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:50,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916926368] [2021-06-05 21:03:50,526 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 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 [2021-06-05 21:03:50,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:03:50,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:50,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:03:50,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:50,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:50,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916926368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:50,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:50,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-06-05 21:03:50,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191028894] [2021-06-05 21:03:50,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:03:50,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:50,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:03:50,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:03:50,592 INFO L87 Difference]: Start difference. First operand 4109 states and 15388 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:50,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:50,698 INFO L93 Difference]: Finished difference Result 8656 states and 31846 transitions. [2021-06-05 21:03:50,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:03:50,698 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:03:50,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:50,714 INFO L225 Difference]: With dead ends: 8656 [2021-06-05 21:03:50,714 INFO L226 Difference]: Without dead ends: 8340 [2021-06-05 21:03:50,714 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 37.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:50,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8340 states. [2021-06-05 21:03:50,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8340 to 5370. [2021-06-05 21:03:50,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5370 states, 5369 states have (on average 3.8379586515179738) internal successors, (20606), 5369 states have internal predecessors, (20606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:50,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5370 states to 5370 states and 20606 transitions. [2021-06-05 21:03:50,804 INFO L78 Accepts]: Start accepts. Automaton has 5370 states and 20606 transitions. Word has length 27 [2021-06-05 21:03:50,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:50,804 INFO L482 AbstractCegarLoop]: Abstraction has 5370 states and 20606 transitions. [2021-06-05 21:03:50,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:50,804 INFO L276 IsEmpty]: Start isEmpty. Operand 5370 states and 20606 transitions. [2021-06-05 21:03:50,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:03:50,812 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:50,812 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:51,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:51,012 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:51,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:51,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1648096775, now seen corresponding path program 7 times [2021-06-05 21:03:51,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:51,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74240760] [2021-06-05 21:03:51,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:51,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:51,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:51,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74240760] [2021-06-05 21:03:51,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74240760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:51,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392389081] [2021-06-05 21:03:51,041 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 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 [2021-06-05 21:03:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:51,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:03:51,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:51,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392389081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:51,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:51,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-06-05 21:03:51,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811332488] [2021-06-05 21:03:51,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:03:51,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:51,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:03:51,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:03:51,114 INFO L87 Difference]: Start difference. First operand 5370 states and 20606 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:51,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:51,210 INFO L93 Difference]: Finished difference Result 8619 states and 31580 transitions. [2021-06-05 21:03:51,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:03:51,210 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:03:51,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:51,224 INFO L225 Difference]: With dead ends: 8619 [2021-06-05 21:03:51,224 INFO L226 Difference]: Without dead ends: 8251 [2021-06-05 21:03:51,224 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:51,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2021-06-05 21:03:51,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 5352. [2021-06-05 21:03:51,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5352 states, 5351 states have (on average 3.834984115118669) internal successors, (20521), 5351 states have internal predecessors, (20521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:51,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5352 states to 5352 states and 20521 transitions. [2021-06-05 21:03:51,323 INFO L78 Accepts]: Start accepts. Automaton has 5352 states and 20521 transitions. Word has length 27 [2021-06-05 21:03:51,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:51,323 INFO L482 AbstractCegarLoop]: Abstraction has 5352 states and 20521 transitions. [2021-06-05 21:03:51,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:51,324 INFO L276 IsEmpty]: Start isEmpty. Operand 5352 states and 20521 transitions. [2021-06-05 21:03:51,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:03:51,331 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:51,331 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:51,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 21:03:51,531 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:51,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:51,531 INFO L82 PathProgramCache]: Analyzing trace with hash 888507809, now seen corresponding path program 8 times [2021-06-05 21:03:51,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:51,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138028547] [2021-06-05 21:03:51,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:51,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:51,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:51,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138028547] [2021-06-05 21:03:51,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138028547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:51,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761738929] [2021-06-05 21:03:51,567 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:03:51,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:03:51,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:51,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:03:51,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:51,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:51,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761738929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:51,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:51,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 21:03:51,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306069218] [2021-06-05 21:03:51,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:03:51,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:51,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:03:51,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:51,663 INFO L87 Difference]: Start difference. First operand 5352 states and 20521 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:51,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:51,784 INFO L93 Difference]: Finished difference Result 8299 states and 30586 transitions. [2021-06-05 21:03:51,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:03:51,788 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:03:51,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:51,802 INFO L225 Difference]: With dead ends: 8299 [2021-06-05 21:03:51,802 INFO L226 Difference]: Without dead ends: 7871 [2021-06-05 21:03:51,803 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:03:51,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7871 states. [2021-06-05 21:03:51,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7871 to 5590. [2021-06-05 21:03:51,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5590 states, 5589 states have (on average 3.8017534442655214) internal successors, (21248), 5589 states have internal predecessors, (21248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:51,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5590 states to 5590 states and 21248 transitions. [2021-06-05 21:03:51,884 INFO L78 Accepts]: Start accepts. Automaton has 5590 states and 21248 transitions. Word has length 27 [2021-06-05 21:03:51,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:51,884 INFO L482 AbstractCegarLoop]: Abstraction has 5590 states and 21248 transitions. [2021-06-05 21:03:51,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:51,884 INFO L276 IsEmpty]: Start isEmpty. Operand 5590 states and 21248 transitions. [2021-06-05 21:03:51,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:03:51,891 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:51,891 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:52,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 21:03:52,092 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:52,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:52,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1554761067, now seen corresponding path program 2 times [2021-06-05 21:03:52,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:52,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632239272] [2021-06-05 21:03:52,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:52,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:52,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:52,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:52,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632239272] [2021-06-05 21:03:52,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632239272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:52,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901167570] [2021-06-05 21:03:52,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:03:52,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:03:52,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:52,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:03:52,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:52,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:03:52,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:03:52,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:03:52,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:03:52,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 21:03:52,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:52,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901167570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:52,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:52,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 21:03:52,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731204604] [2021-06-05 21:03:52,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:52,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:52,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:52,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:52,204 INFO L87 Difference]: Start difference. First operand 5590 states and 21248 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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) [2021-06-05 21:03:52,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:52,344 INFO L93 Difference]: Finished difference Result 5588 states and 20704 transitions. [2021-06-05 21:03:52,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:03:52,345 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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 27 [2021-06-05 21:03:52,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:52,353 INFO L225 Difference]: With dead ends: 5588 [2021-06-05 21:03:52,353 INFO L226 Difference]: Without dead ends: 5117 [2021-06-05 21:03:52,353 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:03:52,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-06-05 21:03:52,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 4893. [2021-06-05 21:03:52,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4893 states, 4892 states have (on average 3.8068274734260017) internal successors, (18623), 4892 states have internal predecessors, (18623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:52,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4893 states to 4893 states and 18623 transitions. [2021-06-05 21:03:52,415 INFO L78 Accepts]: Start accepts. Automaton has 4893 states and 18623 transitions. Word has length 27 [2021-06-05 21:03:52,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:52,415 INFO L482 AbstractCegarLoop]: Abstraction has 4893 states and 18623 transitions. [2021-06-05 21:03:52,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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) [2021-06-05 21:03:52,415 INFO L276 IsEmpty]: Start isEmpty. Operand 4893 states and 18623 transitions. [2021-06-05 21:03:52,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:03:52,422 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:52,422 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:52,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 21:03:52,623 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:52,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:52,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1455495413, now seen corresponding path program 3 times [2021-06-05 21:03:52,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:52,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522716019] [2021-06-05 21:03:52,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:03:52,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:52,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522716019] [2021-06-05 21:03:52,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522716019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:52,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484812832] [2021-06-05 21:03:52,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:52,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:03:52,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:52,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:03:52,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:52,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:03:52,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:03:52,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:03:52,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:03:52,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-06-05 21:03:52,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:03:52,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484812832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:52,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:52,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-06-05 21:03:52,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141337484] [2021-06-05 21:03:52,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:03:52,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:52,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:03:52,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:03:52,823 INFO L87 Difference]: Start difference. First operand 4893 states and 18623 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:52,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:52,990 INFO L93 Difference]: Finished difference Result 5208 states and 19682 transitions. [2021-06-05 21:03:52,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:03:52,991 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:03:52,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:52,998 INFO L225 Difference]: With dead ends: 5208 [2021-06-05 21:03:52,998 INFO L226 Difference]: Without dead ends: 5208 [2021-06-05 21:03:52,999 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 134.7ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:03:53,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5208 states. [2021-06-05 21:03:53,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5208 to 4755. [2021-06-05 21:03:53,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4755 states, 4754 states have (on average 3.8029028186790073) internal successors, (18079), 4754 states have internal predecessors, (18079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:53,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4755 states to 4755 states and 18079 transitions. [2021-06-05 21:03:53,057 INFO L78 Accepts]: Start accepts. Automaton has 4755 states and 18079 transitions. Word has length 27 [2021-06-05 21:03:53,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:53,058 INFO L482 AbstractCegarLoop]: Abstraction has 4755 states and 18079 transitions. [2021-06-05 21:03:53,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:53,058 INFO L276 IsEmpty]: Start isEmpty. Operand 4755 states and 18079 transitions. [2021-06-05 21:03:53,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:03:53,064 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:53,064 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:03:53,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 21:03:53,275 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:53,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:53,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1336459591, now seen corresponding path program 4 times [2021-06-05 21:03:53,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:53,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16191884] [2021-06-05 21:03:53,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:53,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:53,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:53,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16191884] [2021-06-05 21:03:53,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16191884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:53,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553607765] [2021-06-05 21:03:53,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:53,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:03:53,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:53,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:03:53,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:53,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:03:53,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:03:53,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:03:53,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:03:53,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 21:03:53,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:53,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553607765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:53,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:53,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 21:03:53,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200869597] [2021-06-05 21:03:53,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:03:53,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:53,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:03:53,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:03:53,443 INFO L87 Difference]: Start difference. First operand 4755 states and 18079 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:53,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:53,564 INFO L93 Difference]: Finished difference Result 4613 states and 17475 transitions. [2021-06-05 21:03:53,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:03:53,564 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 21:03:53,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:53,571 INFO L225 Difference]: With dead ends: 4613 [2021-06-05 21:03:53,571 INFO L226 Difference]: Without dead ends: 4453 [2021-06-05 21:03:53,571 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 133.8ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:03:53,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4453 states. [2021-06-05 21:03:53,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4453 to 4453. [2021-06-05 21:03:53,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4453 states, 4452 states have (on average 3.8313117699910153) internal successors, (17057), 4452 states have internal predecessors, (17057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:53,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4453 states to 4453 states and 17057 transitions. [2021-06-05 21:03:53,621 INFO L78 Accepts]: Start accepts. Automaton has 4453 states and 17057 transitions. Word has length 27 [2021-06-05 21:03:53,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:53,621 INFO L482 AbstractCegarLoop]: Abstraction has 4453 states and 17057 transitions. [2021-06-05 21:03:53,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:53,621 INFO L276 IsEmpty]: Start isEmpty. Operand 4453 states and 17057 transitions. [2021-06-05 21:03:53,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:03:53,627 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:53,627 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] [2021-06-05 21:03:53,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:53,841 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:53,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:53,841 INFO L82 PathProgramCache]: Analyzing trace with hash -393228176, now seen corresponding path program 9 times [2021-06-05 21:03:53,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:53,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976839912] [2021-06-05 21:03:53,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:53,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:53,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976839912] [2021-06-05 21:03:53,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976839912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:53,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687090632] [2021-06-05 21:03:53,883 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 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 [2021-06-05 21:03:53,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:03:53,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:53,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:03:53,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:54,010 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:03:54,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687090632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:54,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:54,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:03:54,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879316101] [2021-06-05 21:03:54,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:03:54,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:54,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:03:54,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:03:54,011 INFO L87 Difference]: Start difference. First operand 4453 states and 17057 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:54,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:54,965 INFO L93 Difference]: Finished difference Result 18250 states and 67488 transitions. [2021-06-05 21:03:54,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 21:03:54,965 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 21:03:54,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:54,999 INFO L225 Difference]: With dead ends: 18250 [2021-06-05 21:03:54,999 INFO L226 Difference]: Without dead ends: 17714 [2021-06-05 21:03:54,999 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 487.4ms TimeCoverageRelationStatistics Valid=373, Invalid=1433, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 21:03:55,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17714 states. [2021-06-05 21:03:55,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17714 to 11055. [2021-06-05 21:03:55,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11055 states, 11054 states have (on average 4.028586936855437) internal successors, (44532), 11054 states have internal predecessors, (44532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:55,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11055 states to 11055 states and 44532 transitions. [2021-06-05 21:03:55,252 INFO L78 Accepts]: Start accepts. Automaton has 11055 states and 44532 transitions. Word has length 30 [2021-06-05 21:03:55,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:55,252 INFO L482 AbstractCegarLoop]: Abstraction has 11055 states and 44532 transitions. [2021-06-05 21:03:55,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:55,252 INFO L276 IsEmpty]: Start isEmpty. Operand 11055 states and 44532 transitions. [2021-06-05 21:03:55,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:03:55,268 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:55,268 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] [2021-06-05 21:03:55,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 21:03:55,468 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:55,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:55,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1496580308, now seen corresponding path program 10 times [2021-06-05 21:03:55,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:55,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789194246] [2021-06-05 21:03:55,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:55,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:55,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789194246] [2021-06-05 21:03:55,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789194246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:55,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698867577] [2021-06-05 21:03:55,511 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:03:55,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:03:55,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:55,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:03:55,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:55,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:03:55,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:03:55,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:03:55,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:03:55,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-06-05 21:03:55,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:55,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698867577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:55,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:55,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:03:55,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288816845] [2021-06-05 21:03:55,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:03:55,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:55,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:03:55,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:03:55,708 INFO L87 Difference]: Start difference. First operand 11055 states and 44532 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-06-05 21:03:57,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:57,351 INFO L93 Difference]: Finished difference Result 23408 states and 90037 transitions. [2021-06-05 21:03:57,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 21:03:57,351 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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 30 [2021-06-05 21:03:57,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:57,400 INFO L225 Difference]: With dead ends: 23408 [2021-06-05 21:03:57,401 INFO L226 Difference]: Without dead ends: 22853 [2021-06-05 21:03:57,401 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 714.3ms TimeCoverageRelationStatistics Valid=393, Invalid=1959, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 21:03:57,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22853 states. [2021-06-05 21:03:57,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22853 to 15842. [2021-06-05 21:03:57,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15842 states, 15841 states have (on average 4.061738526608169) internal successors, (64342), 15841 states have internal predecessors, (64342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:57,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15842 states to 15842 states and 64342 transitions. [2021-06-05 21:03:57,727 INFO L78 Accepts]: Start accepts. Automaton has 15842 states and 64342 transitions. Word has length 30 [2021-06-05 21:03:57,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:57,728 INFO L482 AbstractCegarLoop]: Abstraction has 15842 states and 64342 transitions. [2021-06-05 21:03:57,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-06-05 21:03:57,728 INFO L276 IsEmpty]: Start isEmpty. Operand 15842 states and 64342 transitions. [2021-06-05 21:03:57,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:03:57,753 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:57,753 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] [2021-06-05 21:03:57,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 21:03:57,953 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:57,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:57,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1834270364, now seen corresponding path program 11 times [2021-06-05 21:03:57,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:57,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751690392] [2021-06-05 21:03:57,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:57,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:57,999 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:57,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:57,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751690392] [2021-06-05 21:03:57,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751690392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:57,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566593734] [2021-06-05 21:03:57,999 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 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 [2021-06-05 21:03:58,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:03:58,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:58,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:03:58,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:58,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:58,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566593734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:58,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:58,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-06-05 21:03:58,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028768549] [2021-06-05 21:03:58,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:03:58,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:58,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:03:58,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:03:58,085 INFO L87 Difference]: Start difference. First operand 15842 states and 64342 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:58,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:58,396 INFO L93 Difference]: Finished difference Result 23804 states and 95370 transitions. [2021-06-05 21:03:58,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:03:58,396 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 21:03:58,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:58,448 INFO L225 Difference]: With dead ends: 23804 [2021-06-05 21:03:58,448 INFO L226 Difference]: Without dead ends: 23752 [2021-06-05 21:03:58,448 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:03:58,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23752 states. [2021-06-05 21:03:58,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23752 to 16213. [2021-06-05 21:03:58,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16213 states, 16212 states have (on average 4.060880829015544) internal successors, (65835), 16212 states have internal predecessors, (65835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:58,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16213 states to 16213 states and 65835 transitions. [2021-06-05 21:03:58,894 INFO L78 Accepts]: Start accepts. Automaton has 16213 states and 65835 transitions. Word has length 30 [2021-06-05 21:03:58,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:03:58,894 INFO L482 AbstractCegarLoop]: Abstraction has 16213 states and 65835 transitions. [2021-06-05 21:03:58,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:03:58,894 INFO L276 IsEmpty]: Start isEmpty. Operand 16213 states and 65835 transitions. [2021-06-05 21:03:58,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:03:58,919 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:03:58,919 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] [2021-06-05 21:03:59,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:03:59,119 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:03:59,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:03:59,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1212389954, now seen corresponding path program 12 times [2021-06-05 21:03:59,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:03:59,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517429740] [2021-06-05 21:03:59,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:03:59,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:03:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:03:59,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:03:59,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517429740] [2021-06-05 21:03:59,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517429740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:59,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882964906] [2021-06-05 21:03:59,162 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 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 [2021-06-05 21:03:59,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:03:59,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:03:59,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:03:59,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:03:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:03:59,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882964906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:03:59,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:03:59,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 21:03:59,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722022414] [2021-06-05 21:03:59,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:03:59,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:03:59,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:03:59,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:03:59,273 INFO L87 Difference]: Start difference. First operand 16213 states and 65835 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 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) [2021-06-05 21:03:59,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:03:59,799 INFO L93 Difference]: Finished difference Result 31221 states and 123338 transitions. [2021-06-05 21:03:59,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:03:59,799 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 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 30 [2021-06-05 21:03:59,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:03:59,871 INFO L225 Difference]: With dead ends: 31221 [2021-06-05 21:03:59,871 INFO L226 Difference]: Without dead ends: 30782 [2021-06-05 21:03:59,871 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 156.3ms TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:03:59,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30782 states. [2021-06-05 21:04:00,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30782 to 23744. [2021-06-05 21:04:00,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23744 states, 23743 states have (on average 4.117634671271532) internal successors, (97765), 23743 states have internal predecessors, (97765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:00,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23744 states to 23744 states and 97765 transitions. [2021-06-05 21:04:00,606 INFO L78 Accepts]: Start accepts. Automaton has 23744 states and 97765 transitions. Word has length 30 [2021-06-05 21:04:00,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:00,606 INFO L482 AbstractCegarLoop]: Abstraction has 23744 states and 97765 transitions. [2021-06-05 21:04:00,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 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) [2021-06-05 21:04:00,606 INFO L276 IsEmpty]: Start isEmpty. Operand 23744 states and 97765 transitions. [2021-06-05 21:04:00,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:04:00,641 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:00,641 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] [2021-06-05 21:04:00,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 21:04:00,841 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:00,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:00,842 INFO L82 PathProgramCache]: Analyzing trace with hash -977561994, now seen corresponding path program 13 times [2021-06-05 21:04:00,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:00,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985362555] [2021-06-05 21:04:00,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:00,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:00,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985362555] [2021-06-05 21:04:00,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985362555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:00,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145736468] [2021-06-05 21:04:00,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 21:04:00,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:00,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:04:00,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:01,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:04:01,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:04:01,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:04:01,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:04:01,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-06-05 21:04:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:01,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145736468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:01,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:01,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:04:01,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477862097] [2021-06-05 21:04:01,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:04:01,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:01,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:04:01,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:04:01,027 INFO L87 Difference]: Start difference. First operand 23744 states and 97765 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-06-05 21:04:02,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:02,241 INFO L93 Difference]: Finished difference Result 35138 states and 142210 transitions. [2021-06-05 21:04:02,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:04:02,241 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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 30 [2021-06-05 21:04:02,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:02,335 INFO L225 Difference]: With dead ends: 35138 [2021-06-05 21:04:02,335 INFO L226 Difference]: Without dead ends: 34623 [2021-06-05 21:04:02,336 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 419.6ms TimeCoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:04:02,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34623 states. [2021-06-05 21:04:02,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34623 to 25637. [2021-06-05 21:04:02,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25637 states, 25636 states have (on average 4.109065376813856) internal successors, (105340), 25636 states have internal predecessors, (105340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:02,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25637 states to 25637 states and 105340 transitions. [2021-06-05 21:04:02,936 INFO L78 Accepts]: Start accepts. Automaton has 25637 states and 105340 transitions. Word has length 30 [2021-06-05 21:04:02,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:02,936 INFO L482 AbstractCegarLoop]: Abstraction has 25637 states and 105340 transitions. [2021-06-05 21:04:02,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-06-05 21:04:02,936 INFO L276 IsEmpty]: Start isEmpty. Operand 25637 states and 105340 transitions. [2021-06-05 21:04:02,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:04:02,973 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:02,973 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] [2021-06-05 21:04:03,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:03,174 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:03,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:03,174 INFO L82 PathProgramCache]: Analyzing trace with hash 986277488, now seen corresponding path program 14 times [2021-06-05 21:04:03,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:03,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358372151] [2021-06-05 21:04:03,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:03,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:03,226 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:03,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:03,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358372151] [2021-06-05 21:04:03,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358372151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:03,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031414013] [2021-06-05 21:04:03,227 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 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 [2021-06-05 21:04:03,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:04:03,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:03,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:04:03,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:03,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:03,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031414013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:03,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:03,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 21:04:03,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695683958] [2021-06-05 21:04:03,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:04:03,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:03,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:04:03,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:04:03,343 INFO L87 Difference]: Start difference. First operand 25637 states and 105340 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:04,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:04,236 INFO L93 Difference]: Finished difference Result 51004 states and 204742 transitions. [2021-06-05 21:04:04,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:04:04,237 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 21:04:04,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:04,377 INFO L225 Difference]: With dead ends: 51004 [2021-06-05 21:04:04,378 INFO L226 Difference]: Without dead ends: 50772 [2021-06-05 21:04:04,378 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 202.0ms TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:04:04,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50772 states. [2021-06-05 21:04:05,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50772 to 38308. [2021-06-05 21:04:05,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38308 states, 38307 states have (on average 4.208395332445767) internal successors, (161211), 38307 states have internal predecessors, (161211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:05,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38308 states to 38308 states and 161211 transitions. [2021-06-05 21:04:05,474 INFO L78 Accepts]: Start accepts. Automaton has 38308 states and 161211 transitions. Word has length 30 [2021-06-05 21:04:05,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:05,474 INFO L482 AbstractCegarLoop]: Abstraction has 38308 states and 161211 transitions. [2021-06-05 21:04:05,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:05,474 INFO L276 IsEmpty]: Start isEmpty. Operand 38308 states and 161211 transitions. [2021-06-05 21:04:05,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:04:05,527 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:05,528 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] [2021-06-05 21:04:05,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 21:04:05,728 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:05,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:05,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1130060142, now seen corresponding path program 15 times [2021-06-05 21:04:05,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:05,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090667188] [2021-06-05 21:04:05,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:05,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:05,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:05,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090667188] [2021-06-05 21:04:05,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090667188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:05,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482726439] [2021-06-05 21:04:05,766 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 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 [2021-06-05 21:04:05,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:04:05,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:05,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:04:05,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:05,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482726439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:05,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:05,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-06-05 21:04:05,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359640560] [2021-06-05 21:04:05,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:04:05,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:05,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:04:05,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:04:05,875 INFO L87 Difference]: Start difference. First operand 38308 states and 161211 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:06,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:06,605 INFO L93 Difference]: Finished difference Result 45696 states and 184859 transitions. [2021-06-05 21:04:06,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:04:06,605 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 21:04:06,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:06,729 INFO L225 Difference]: With dead ends: 45696 [2021-06-05 21:04:06,729 INFO L226 Difference]: Without dead ends: 45550 [2021-06-05 21:04:06,729 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 168.6ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:04:06,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45550 states. [2021-06-05 21:04:07,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45550 to 38454. [2021-06-05 21:04:07,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38454 states, 38453 states have (on average 4.205341585832055) internal successors, (161708), 38453 states have internal predecessors, (161708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:07,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38454 states to 38454 states and 161708 transitions. [2021-06-05 21:04:07,799 INFO L78 Accepts]: Start accepts. Automaton has 38454 states and 161708 transitions. Word has length 30 [2021-06-05 21:04:07,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:07,799 INFO L482 AbstractCegarLoop]: Abstraction has 38454 states and 161708 transitions. [2021-06-05 21:04:07,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:07,800 INFO L276 IsEmpty]: Start isEmpty. Operand 38454 states and 161708 transitions. [2021-06-05 21:04:07,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:04:07,854 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:07,854 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] [2021-06-05 21:04:08,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:08,054 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:08,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:08,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1343876520, now seen corresponding path program 16 times [2021-06-05 21:04:08,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:08,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853125401] [2021-06-05 21:04:08,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:08,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:08,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:08,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:08,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853125401] [2021-06-05 21:04:08,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853125401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:08,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786095972] [2021-06-05 21:04:08,084 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 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 [2021-06-05 21:04:08,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:04:08,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:08,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:04:08,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:08,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:04:08,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:04:08,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:04:08,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:04:08,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-06-05 21:04:08,226 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:08,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786095972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:08,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:08,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-06-05 21:04:08,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266819890] [2021-06-05 21:04:08,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:04:08,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:08,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:04:08,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:04:08,227 INFO L87 Difference]: Start difference. First operand 38454 states and 161708 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-06-05 21:04:09,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:09,975 INFO L93 Difference]: Finished difference Result 55267 states and 223349 transitions. [2021-06-05 21:04:09,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 21:04:09,976 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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 30 [2021-06-05 21:04:09,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:10,134 INFO L225 Difference]: With dead ends: 55267 [2021-06-05 21:04:10,134 INFO L226 Difference]: Without dead ends: 54596 [2021-06-05 21:04:10,135 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 593.2ms TimeCoverageRelationStatistics Valid=316, Invalid=1664, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 21:04:10,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54596 states. [2021-06-05 21:04:11,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54596 to 41454. [2021-06-05 21:04:11,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41454 states, 41453 states have (on average 4.203965937326611) internal successors, (174267), 41453 states have internal predecessors, (174267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:11,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41454 states to 41454 states and 174267 transitions. [2021-06-05 21:04:11,429 INFO L78 Accepts]: Start accepts. Automaton has 41454 states and 174267 transitions. Word has length 30 [2021-06-05 21:04:11,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:11,429 INFO L482 AbstractCegarLoop]: Abstraction has 41454 states and 174267 transitions. [2021-06-05 21:04:11,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-06-05 21:04:11,429 INFO L276 IsEmpty]: Start isEmpty. Operand 41454 states and 174267 transitions. [2021-06-05 21:04:11,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:04:11,485 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:11,485 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] [2021-06-05 21:04:11,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 21:04:11,686 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:11,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:11,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1709456920, now seen corresponding path program 1 times [2021-06-05 21:04:11,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:11,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558890747] [2021-06-05 21:04:11,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:11,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:11,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558890747] [2021-06-05 21:04:11,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558890747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:11,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772363211] [2021-06-05 21:04:11,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:11,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:04:11,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:11,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772363211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:11,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:11,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-06-05 21:04:11,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126971703] [2021-06-05 21:04:11,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:04:11,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:11,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:04:11,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:04:11,888 INFO L87 Difference]: Start difference. First operand 41454 states and 174267 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-06-05 21:04:13,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:13,525 INFO L93 Difference]: Finished difference Result 56968 states and 227845 transitions. [2021-06-05 21:04:13,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 21:04:13,525 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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 30 [2021-06-05 21:04:13,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:13,673 INFO L225 Difference]: With dead ends: 56968 [2021-06-05 21:04:13,673 INFO L226 Difference]: Without dead ends: 56506 [2021-06-05 21:04:13,674 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 784.6ms TimeCoverageRelationStatistics Valid=315, Invalid=1577, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 21:04:13,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56506 states. [2021-06-05 21:04:14,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56506 to 42332. [2021-06-05 21:04:14,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42332 states, 42331 states have (on average 4.198270770829888) internal successors, (177717), 42331 states have internal predecessors, (177717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:15,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42332 states to 42332 states and 177717 transitions. [2021-06-05 21:04:15,017 INFO L78 Accepts]: Start accepts. Automaton has 42332 states and 177717 transitions. Word has length 30 [2021-06-05 21:04:15,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:15,017 INFO L482 AbstractCegarLoop]: Abstraction has 42332 states and 177717 transitions. [2021-06-05 21:04:15,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-06-05 21:04:15,017 INFO L276 IsEmpty]: Start isEmpty. Operand 42332 states and 177717 transitions. [2021-06-05 21:04:15,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:04:15,074 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:15,074 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] [2021-06-05 21:04:15,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 21:04:15,274 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:15,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:15,275 INFO L82 PathProgramCache]: Analyzing trace with hash 541122106, now seen corresponding path program 17 times [2021-06-05 21:04:15,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:15,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834283882] [2021-06-05 21:04:15,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:15,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:15,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834283882] [2021-06-05 21:04:15,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834283882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:15,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937151941] [2021-06-05 21:04:15,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:15,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:04:15,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:15,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:04:15,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:15,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:15,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937151941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:15,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:15,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 9 [2021-06-05 21:04:15,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910359069] [2021-06-05 21:04:15,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:04:15,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:15,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:04:15,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:04:15,397 INFO L87 Difference]: Start difference. First operand 42332 states and 177717 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:16,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:16,212 INFO L93 Difference]: Finished difference Result 52680 states and 212917 transitions. [2021-06-05 21:04:16,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:04:16,212 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 21:04:16,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:16,354 INFO L225 Difference]: With dead ends: 52680 [2021-06-05 21:04:16,355 INFO L226 Difference]: Without dead ends: 52640 [2021-06-05 21:04:16,355 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:04:16,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52640 states. [2021-06-05 21:04:17,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52640 to 42878. [2021-06-05 21:04:17,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42878 states, 42877 states have (on average 4.208503393427712) internal successors, (180448), 42877 states have internal predecessors, (180448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:17,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42878 states to 42878 states and 180448 transitions. [2021-06-05 21:04:17,497 INFO L78 Accepts]: Start accepts. Automaton has 42878 states and 180448 transitions. Word has length 30 [2021-06-05 21:04:17,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:17,497 INFO L482 AbstractCegarLoop]: Abstraction has 42878 states and 180448 transitions. [2021-06-05 21:04:17,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:17,497 INFO L276 IsEmpty]: Start isEmpty. Operand 42878 states and 180448 transitions. [2021-06-05 21:04:17,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:04:17,555 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:17,555 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] [2021-06-05 21:04:17,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:17,761 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:17,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:17,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1494154336, now seen corresponding path program 18 times [2021-06-05 21:04:17,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:17,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728721390] [2021-06-05 21:04:17,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:17,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:18,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:18,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728721390] [2021-06-05 21:04:18,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728721390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:18,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022681928] [2021-06-05 21:04:18,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:18,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:04:18,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:18,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:04:18,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:18,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022681928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:18,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:18,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-06-05 21:04:18,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138354836] [2021-06-05 21:04:18,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:04:18,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:18,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:04:18,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:04:18,214 INFO L87 Difference]: Start difference. First operand 42878 states and 180448 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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) [2021-06-05 21:04:19,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:19,263 INFO L93 Difference]: Finished difference Result 93945 states and 386209 transitions. [2021-06-05 21:04:19,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:04:19,263 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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 30 [2021-06-05 21:04:19,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:19,776 INFO L225 Difference]: With dead ends: 93945 [2021-06-05 21:04:19,776 INFO L226 Difference]: Without dead ends: 92826 [2021-06-05 21:04:19,777 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 295.5ms TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:04:19,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92826 states. [2021-06-05 21:04:21,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92826 to 70922. [2021-06-05 21:04:21,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70922 states, 70921 states have (on average 4.303647720703318) internal successors, (305219), 70921 states have internal predecessors, (305219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:21,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70922 states to 70922 states and 305219 transitions. [2021-06-05 21:04:21,768 INFO L78 Accepts]: Start accepts. Automaton has 70922 states and 305219 transitions. Word has length 30 [2021-06-05 21:04:21,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:21,768 INFO L482 AbstractCegarLoop]: Abstraction has 70922 states and 305219 transitions. [2021-06-05 21:04:21,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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) [2021-06-05 21:04:21,768 INFO L276 IsEmpty]: Start isEmpty. Operand 70922 states and 305219 transitions. [2021-06-05 21:04:21,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:04:21,845 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:21,846 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] [2021-06-05 21:04:22,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 21:04:22,046 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:22,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:22,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1262024518, now seen corresponding path program 19 times [2021-06-05 21:04:22,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:22,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889777293] [2021-06-05 21:04:22,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:22,088 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:22,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:22,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889777293] [2021-06-05 21:04:22,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889777293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:22,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297313486] [2021-06-05 21:04:22,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:22,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:04:22,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:22,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:04:22,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:04:22,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:04:22,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:04:22,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-06-05 21:04:22,226 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:22,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297313486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:22,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:22,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:04:22,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763217855] [2021-06-05 21:04:22,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:04:22,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:22,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:04:22,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:04:22,226 INFO L87 Difference]: Start difference. First operand 70922 states and 305219 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-06-05 21:04:24,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:24,702 INFO L93 Difference]: Finished difference Result 91994 states and 383695 transitions. [2021-06-05 21:04:24,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 21:04:24,703 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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 30 [2021-06-05 21:04:24,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:24,974 INFO L225 Difference]: With dead ends: 91994 [2021-06-05 21:04:24,974 INFO L226 Difference]: Without dead ends: 91128 [2021-06-05 21:04:24,974 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 755.8ms TimeCoverageRelationStatistics Valid=406, Invalid=2044, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 21:04:25,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91128 states. [2021-06-05 21:04:26,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91128 to 75370. [2021-06-05 21:04:26,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75370 states, 75369 states have (on average 4.307619843702318) internal successors, (324661), 75369 states have internal predecessors, (324661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:27,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75370 states to 75370 states and 324661 transitions. [2021-06-05 21:04:27,098 INFO L78 Accepts]: Start accepts. Automaton has 75370 states and 324661 transitions. Word has length 30 [2021-06-05 21:04:27,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:27,098 INFO L482 AbstractCegarLoop]: Abstraction has 75370 states and 324661 transitions. [2021-06-05 21:04:27,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-06-05 21:04:27,098 INFO L276 IsEmpty]: Start isEmpty. Operand 75370 states and 324661 transitions. [2021-06-05 21:04:27,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:04:27,184 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:27,184 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] [2021-06-05 21:04:27,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:27,385 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:27,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:27,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1475840896, now seen corresponding path program 20 times [2021-06-05 21:04:27,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:27,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220455794] [2021-06-05 21:04:27,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:27,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:27,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:27,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220455794] [2021-06-05 21:04:27,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220455794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:27,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643152182] [2021-06-05 21:04:27,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:27,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:04:27,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:27,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:04:27,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:27,547 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:27,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643152182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:27,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:27,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 21:04:27,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723806431] [2021-06-05 21:04:27,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:04:27,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:27,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:04:27,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:04:27,548 INFO L87 Difference]: Start difference. First operand 75370 states and 324661 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:28,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:28,638 INFO L93 Difference]: Finished difference Result 98132 states and 416693 transitions. [2021-06-05 21:04:28,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:04:28,639 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 21:04:28,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:28,954 INFO L225 Difference]: With dead ends: 98132 [2021-06-05 21:04:28,954 INFO L226 Difference]: Without dead ends: 98068 [2021-06-05 21:04:28,954 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:04:29,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98068 states. [2021-06-05 21:04:31,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98068 to 90511. [2021-06-05 21:04:31,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90511 states, 90510 states have (on average 4.326869959120539) internal successors, (391625), 90510 states have internal predecessors, (391625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:31,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90511 states to 90511 states and 391625 transitions. [2021-06-05 21:04:31,798 INFO L78 Accepts]: Start accepts. Automaton has 90511 states and 391625 transitions. Word has length 30 [2021-06-05 21:04:31,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:31,813 INFO L482 AbstractCegarLoop]: Abstraction has 90511 states and 391625 transitions. [2021-06-05 21:04:31,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:31,813 INFO L276 IsEmpty]: Start isEmpty. Operand 90511 states and 391625 transitions. [2021-06-05 21:04:31,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:04:31,944 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:31,944 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] [2021-06-05 21:04:32,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 21:04:32,157 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:32,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:32,157 INFO L82 PathProgramCache]: Analyzing trace with hash 476999490, now seen corresponding path program 2 times [2021-06-05 21:04:32,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:32,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453343148] [2021-06-05 21:04:32,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:32,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:32,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453343148] [2021-06-05 21:04:32,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453343148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:32,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238233639] [2021-06-05 21:04:32,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:32,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:04:32,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:32,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:04:32,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:32,319 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:32,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238233639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:32,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:32,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 21:04:32,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189488816] [2021-06-05 21:04:32,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:04:32,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:32,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:04:32,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:04:32,320 INFO L87 Difference]: Start difference. First operand 90511 states and 391625 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:33,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:33,099 INFO L93 Difference]: Finished difference Result 98511 states and 417660 transitions. [2021-06-05 21:04:33,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:04:33,100 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 21:04:33,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:33,847 INFO L225 Difference]: With dead ends: 98511 [2021-06-05 21:04:33,848 INFO L226 Difference]: Without dead ends: 98337 [2021-06-05 21:04:33,848 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 169.0ms TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:04:33,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98337 states. [2021-06-05 21:04:36,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98337 to 90305. [2021-06-05 21:04:36,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90305 states, 90304 states have (on average 4.329077338766832) internal successors, (390933), 90304 states have internal predecessors, (390933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:36,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90305 states to 90305 states and 390933 transitions. [2021-06-05 21:04:36,448 INFO L78 Accepts]: Start accepts. Automaton has 90305 states and 390933 transitions. Word has length 30 [2021-06-05 21:04:36,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:36,448 INFO L482 AbstractCegarLoop]: Abstraction has 90305 states and 390933 transitions. [2021-06-05 21:04:36,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:36,448 INFO L276 IsEmpty]: Start isEmpty. Operand 90305 states and 390933 transitions. [2021-06-05 21:04:36,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:04:36,550 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:36,550 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] [2021-06-05 21:04:36,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 21:04:36,751 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:36,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:36,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1372991872, now seen corresponding path program 3 times [2021-06-05 21:04:36,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:36,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78269612] [2021-06-05 21:04:36,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:36,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:36,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:36,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:36,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78269612] [2021-06-05 21:04:36,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78269612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:36,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884884092] [2021-06-05 21:04:36,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:36,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:04:36,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:36,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:04:36,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:36,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:36,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884884092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:36,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:36,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-06-05 21:04:36,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333732817] [2021-06-05 21:04:36,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:04:36,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:36,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:04:36,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:04:36,897 INFO L87 Difference]: Start difference. First operand 90305 states and 390933 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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) [2021-06-05 21:04:38,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:38,074 INFO L93 Difference]: Finished difference Result 102107 states and 432585 transitions. [2021-06-05 21:04:38,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:04:38,074 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 21:04:38,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:38,395 INFO L225 Difference]: With dead ends: 102107 [2021-06-05 21:04:38,395 INFO L226 Difference]: Without dead ends: 101965 [2021-06-05 21:04:38,395 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 155.8ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:04:38,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101965 states. [2021-06-05 21:04:40,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101965 to 90694. [2021-06-05 21:04:40,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90694 states, 90693 states have (on average 4.332815101496257) internal successors, (392956), 90693 states have internal predecessors, (392956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:41,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90694 states to 90694 states and 392956 transitions. [2021-06-05 21:04:41,057 INFO L78 Accepts]: Start accepts. Automaton has 90694 states and 392956 transitions. Word has length 30 [2021-06-05 21:04:41,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:41,057 INFO L482 AbstractCegarLoop]: Abstraction has 90694 states and 392956 transitions. [2021-06-05 21:04:41,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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) [2021-06-05 21:04:41,058 INFO L276 IsEmpty]: Start isEmpty. Operand 90694 states and 392956 transitions. [2021-06-05 21:04:41,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:04:41,552 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:41,552 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] [2021-06-05 21:04:41,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 21:04:41,752 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:41,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:41,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1079688236, now seen corresponding path program 21 times [2021-06-05 21:04:41,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:41,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359998568] [2021-06-05 21:04:41,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:41,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:41,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:41,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359998568] [2021-06-05 21:04:41,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359998568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:41,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931298073] [2021-06-05 21:04:41,795 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:41,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:04:41,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:41,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:04:41,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:04:41,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931298073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:41,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:41,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:04:41,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645906717] [2021-06-05 21:04:41,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:04:41,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:41,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:04:41,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:04:41,915 INFO L87 Difference]: Start difference. First operand 90694 states and 392956 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 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) [2021-06-05 21:04:43,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:43,593 INFO L93 Difference]: Finished difference Result 122868 states and 520265 transitions. [2021-06-05 21:04:43,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:04:43,593 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 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 30 [2021-06-05 21:04:43,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:43,958 INFO L225 Difference]: With dead ends: 122868 [2021-06-05 21:04:43,958 INFO L226 Difference]: Without dead ends: 120504 [2021-06-05 21:04:43,959 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 358.3ms TimeCoverageRelationStatistics Valid=315, Invalid=875, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:04:44,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120504 states. [2021-06-05 21:04:45,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120504 to 55126. [2021-06-05 21:04:45,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55126 states, 55125 states have (on average 4.2524444444444445) internal successors, (234416), 55125 states have internal predecessors, (234416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:45,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55126 states to 55126 states and 234416 transitions. [2021-06-05 21:04:45,829 INFO L78 Accepts]: Start accepts. Automaton has 55126 states and 234416 transitions. Word has length 30 [2021-06-05 21:04:45,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:45,829 INFO L482 AbstractCegarLoop]: Abstraction has 55126 states and 234416 transitions. [2021-06-05 21:04:45,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 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) [2021-06-05 21:04:45,829 INFO L276 IsEmpty]: Start isEmpty. Operand 55126 states and 234416 transitions. [2021-06-05 21:04:45,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:04:45,903 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:45,903 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] [2021-06-05 21:04:46,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 21:04:46,104 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:46,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:46,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1101625758, now seen corresponding path program 22 times [2021-06-05 21:04:46,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:46,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190673600] [2021-06-05 21:04:46,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:46,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:46,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190673600] [2021-06-05 21:04:46,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190673600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:46,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271542168] [2021-06-05 21:04:46,135 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:46,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:04:46,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:46,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:04:46,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:46,519 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-05 21:04:46,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:04:46,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:04:46,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:04:46,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:04:46,614 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-06-05 21:04:46,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:46,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271542168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:46,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:46,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-06-05 21:04:46,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470690384] [2021-06-05 21:04:46,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:04:46,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:46,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:04:46,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:04:46,642 INFO L87 Difference]: Start difference. First operand 55126 states and 234416 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-06-05 21:04:48,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:48,616 INFO L93 Difference]: Finished difference Result 84592 states and 350525 transitions. [2021-06-05 21:04:48,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 21:04:48,616 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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 30 [2021-06-05 21:04:48,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:48,842 INFO L225 Difference]: With dead ends: 84592 [2021-06-05 21:04:48,842 INFO L226 Difference]: Without dead ends: 83864 [2021-06-05 21:04:48,842 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 654.9ms TimeCoverageRelationStatistics Valid=325, Invalid=1567, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 21:04:48,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83864 states. [2021-06-05 21:04:50,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83864 to 68499. [2021-06-05 21:04:50,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68499 states, 68498 states have (on average 4.276489824520424) internal successors, (292931), 68498 states have internal predecessors, (292931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:50,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68499 states to 68499 states and 292931 transitions. [2021-06-05 21:04:50,376 INFO L78 Accepts]: Start accepts. Automaton has 68499 states and 292931 transitions. Word has length 30 [2021-06-05 21:04:50,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:50,376 INFO L482 AbstractCegarLoop]: Abstraction has 68499 states and 292931 transitions. [2021-06-05 21:04:50,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-06-05 21:04:50,376 INFO L276 IsEmpty]: Start isEmpty. Operand 68499 states and 292931 transitions. [2021-06-05 21:04:50,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:04:50,484 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:50,484 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] [2021-06-05 21:04:50,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:50,693 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:50,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:50,693 INFO L82 PathProgramCache]: Analyzing trace with hash -356508804, now seen corresponding path program 4 times [2021-06-05 21:04:50,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:50,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050754640] [2021-06-05 21:04:50,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:50,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:50,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050754640] [2021-06-05 21:04:50,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050754640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:50,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982544045] [2021-06-05 21:04:50,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:50,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:04:50,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:50,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:04:50,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:50,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:50,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982544045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:50,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:50,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-06-05 21:04:50,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040132519] [2021-06-05 21:04:50,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:04:50,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:50,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:04:50,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:04:50,872 INFO L87 Difference]: Start difference. First operand 68499 states and 292931 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-06-05 21:04:52,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:52,981 INFO L93 Difference]: Finished difference Result 89398 states and 368677 transitions. [2021-06-05 21:04:52,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 21:04:52,982 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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 30 [2021-06-05 21:04:52,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:53,222 INFO L225 Difference]: With dead ends: 89398 [2021-06-05 21:04:53,223 INFO L226 Difference]: Without dead ends: 88772 [2021-06-05 21:04:53,223 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 692.7ms TimeCoverageRelationStatistics Valid=307, Invalid=1499, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 21:04:53,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88772 states. [2021-06-05 21:04:54,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88772 to 70166. [2021-06-05 21:04:54,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70166 states, 70165 states have (on average 4.271944701774389) internal successors, (299741), 70165 states have internal predecessors, (299741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:55,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70166 states to 70166 states and 299741 transitions. [2021-06-05 21:04:55,104 INFO L78 Accepts]: Start accepts. Automaton has 70166 states and 299741 transitions. Word has length 30 [2021-06-05 21:04:55,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:55,104 INFO L482 AbstractCegarLoop]: Abstraction has 70166 states and 299741 transitions. [2021-06-05 21:04:55,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-06-05 21:04:55,104 INFO L276 IsEmpty]: Start isEmpty. Operand 70166 states and 299741 transitions. [2021-06-05 21:04:55,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:04:55,212 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:55,212 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] [2021-06-05 21:04:55,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 21:04:55,413 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:55,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:55,413 INFO L82 PathProgramCache]: Analyzing trace with hash -967659738, now seen corresponding path program 23 times [2021-06-05 21:04:55,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:55,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120003213] [2021-06-05 21:04:55,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:55,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:04:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:04:55,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:04:55,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120003213] [2021-06-05 21:04:55,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120003213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:55,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762226764] [2021-06-05 21:04:55,448 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:55,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:04:55,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:04:55,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:04:55,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:04:55,546 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:04:55,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762226764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:04:55,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:04:55,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2021-06-05 21:04:55,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005758918] [2021-06-05 21:04:55,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:04:55,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:04:55,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:04:55,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:04:55,547 INFO L87 Difference]: Start difference. First operand 70166 states and 299741 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:56,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:04:56,861 INFO L93 Difference]: Finished difference Result 107773 states and 448693 transitions. [2021-06-05 21:04:56,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:04:56,862 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 21:04:56,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:04:57,195 INFO L225 Difference]: With dead ends: 107773 [2021-06-05 21:04:57,195 INFO L226 Difference]: Without dead ends: 107773 [2021-06-05 21:04:57,195 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 236.3ms TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:04:57,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107773 states. [2021-06-05 21:04:59,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107773 to 85136. [2021-06-05 21:04:59,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85136 states, 85135 states have (on average 4.30706524930992) internal successors, (366682), 85135 states have internal predecessors, (366682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:59,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85136 states to 85136 states and 366682 transitions. [2021-06-05 21:04:59,646 INFO L78 Accepts]: Start accepts. Automaton has 85136 states and 366682 transitions. Word has length 30 [2021-06-05 21:04:59,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:04:59,647 INFO L482 AbstractCegarLoop]: Abstraction has 85136 states and 366682 transitions. [2021-06-05 21:04:59,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:04:59,647 INFO L276 IsEmpty]: Start isEmpty. Operand 85136 states and 366682 transitions. [2021-06-05 21:04:59,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:04:59,770 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:04:59,770 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] [2021-06-05 21:04:59,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:04:59,970 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:04:59,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:04:59,970 INFO L82 PathProgramCache]: Analyzing trace with hash 733919980, now seen corresponding path program 24 times [2021-06-05 21:04:59,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:04:59,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106230270] [2021-06-05 21:04:59,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:04:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:00,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:00,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106230270] [2021-06-05 21:05:00,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106230270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:00,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528548994] [2021-06-05 21:05:00,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:00,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:05:00,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:00,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:05:00,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:00,118 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:00,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528548994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:00,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:00,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-06-05 21:05:00,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926040353] [2021-06-05 21:05:00,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:05:00,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:00,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:05:00,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:05:00,119 INFO L87 Difference]: Start difference. First operand 85136 states and 366682 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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) [2021-06-05 21:05:01,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:01,916 INFO L93 Difference]: Finished difference Result 136874 states and 574741 transitions. [2021-06-05 21:05:01,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 21:05:01,916 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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 30 [2021-06-05 21:05:01,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:02,340 INFO L225 Difference]: With dead ends: 136874 [2021-06-05 21:05:02,340 INFO L226 Difference]: Without dead ends: 135508 [2021-06-05 21:05:02,341 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 401.8ms TimeCoverageRelationStatistics Valid=373, Invalid=1187, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:05:02,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135508 states. [2021-06-05 21:05:04,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135508 to 93986. [2021-06-05 21:05:04,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93986 states, 93985 states have (on average 4.333212746714901) internal successors, (407257), 93985 states have internal predecessors, (407257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:05,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93986 states to 93986 states and 407257 transitions. [2021-06-05 21:05:05,540 INFO L78 Accepts]: Start accepts. Automaton has 93986 states and 407257 transitions. Word has length 30 [2021-06-05 21:05:05,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:05,540 INFO L482 AbstractCegarLoop]: Abstraction has 93986 states and 407257 transitions. [2021-06-05 21:05:05,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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) [2021-06-05 21:05:05,541 INFO L276 IsEmpty]: Start isEmpty. Operand 93986 states and 407257 transitions. [2021-06-05 21:05:05,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:05:05,681 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:05,681 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] [2021-06-05 21:05:05,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:05,881 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:05,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:05,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1685858338, now seen corresponding path program 25 times [2021-06-05 21:05:05,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:05,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201021007] [2021-06-05 21:05:05,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:05,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:05:05,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:05,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201021007] [2021-06-05 21:05:05,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201021007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:05,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468460562] [2021-06-05 21:05:05,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:05,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:05,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:06,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:05:06,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:05:06,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:05:06,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:05:06,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-06-05 21:05:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:05:06,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468460562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:06,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:06,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:05:06,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857346935] [2021-06-05 21:05:06,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:05:06,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:06,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:05:06,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:05:06,069 INFO L87 Difference]: Start difference. First operand 93986 states and 407257 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-06-05 21:05:08,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:08,529 INFO L93 Difference]: Finished difference Result 122538 states and 522164 transitions. [2021-06-05 21:05:08,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 21:05:08,530 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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 30 [2021-06-05 21:05:08,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:08,937 INFO L225 Difference]: With dead ends: 122538 [2021-06-05 21:05:08,938 INFO L226 Difference]: Without dead ends: 122036 [2021-06-05 21:05:08,938 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 702.4ms TimeCoverageRelationStatistics Valid=377, Invalid=1785, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 21:05:09,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122036 states. [2021-06-05 21:05:11,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122036 to 107696. [2021-06-05 21:05:11,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107696 states, 107695 states have (on average 4.352569757184642) internal successors, (468750), 107695 states have internal predecessors, (468750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:12,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107696 states to 107696 states and 468750 transitions. [2021-06-05 21:05:12,233 INFO L78 Accepts]: Start accepts. Automaton has 107696 states and 468750 transitions. Word has length 30 [2021-06-05 21:05:12,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:12,233 INFO L482 AbstractCegarLoop]: Abstraction has 107696 states and 468750 transitions. [2021-06-05 21:05:12,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-06-05 21:05:12,237 INFO L276 IsEmpty]: Start isEmpty. Operand 107696 states and 468750 transitions. [2021-06-05 21:05:12,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:05:12,396 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:12,396 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] [2021-06-05 21:05:12,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:12,611 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:12,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:12,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1675959326, now seen corresponding path program 5 times [2021-06-05 21:05:12,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:12,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036619960] [2021-06-05 21:05:12,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:12,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:05:12,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:12,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036619960] [2021-06-05 21:05:12,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036619960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:12,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556119802] [2021-06-05 21:05:12,653 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:12,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:05:12,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:12,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:05:12,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:12,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:05:12,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556119802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:12,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:12,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 21:05:12,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059380793] [2021-06-05 21:05:12,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:05:12,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:12,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:05:12,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:05:12,762 INFO L87 Difference]: Start difference. First operand 107696 states and 468750 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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) [2021-06-05 21:05:14,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:14,502 INFO L93 Difference]: Finished difference Result 152595 states and 646553 transitions. [2021-06-05 21:05:14,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:05:14,503 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 21:05:14,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:14,978 INFO L225 Difference]: With dead ends: 152595 [2021-06-05 21:05:14,978 INFO L226 Difference]: Without dead ends: 152595 [2021-06-05 21:05:14,979 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 246.1ms TimeCoverageRelationStatistics Valid=271, Invalid=659, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:05:15,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152595 states. [2021-06-05 21:05:17,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152595 to 126512. [2021-06-05 21:05:17,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126512 states, 126511 states have (on average 4.371912323829548) internal successors, (553095), 126511 states have internal predecessors, (553095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:18,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126512 states to 126512 states and 553095 transitions. [2021-06-05 21:05:18,753 INFO L78 Accepts]: Start accepts. Automaton has 126512 states and 553095 transitions. Word has length 30 [2021-06-05 21:05:18,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:18,753 INFO L482 AbstractCegarLoop]: Abstraction has 126512 states and 553095 transitions. [2021-06-05 21:05:18,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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) [2021-06-05 21:05:18,753 INFO L276 IsEmpty]: Start isEmpty. Operand 126512 states and 553095 transitions. [2021-06-05 21:05:18,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:05:18,904 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:18,904 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] [2021-06-05 21:05:19,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:19,105 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:19,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:19,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1840643646, now seen corresponding path program 26 times [2021-06-05 21:05:19,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:19,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486245651] [2021-06-05 21:05:19,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:19,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:05:19,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:19,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486245651] [2021-06-05 21:05:19,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486245651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:19,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107276017] [2021-06-05 21:05:19,147 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:19,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:05:19,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:19,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:05:19,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:19,274 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:05:19,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107276017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:19,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:19,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:05:19,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175747352] [2021-06-05 21:05:19,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:05:19,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:19,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:05:19,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:05:19,275 INFO L87 Difference]: Start difference. First operand 126512 states and 553095 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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) [2021-06-05 21:05:20,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:20,775 INFO L93 Difference]: Finished difference Result 141394 states and 612178 transitions. [2021-06-05 21:05:20,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:05:20,776 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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 30 [2021-06-05 21:05:20,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:21,232 INFO L225 Difference]: With dead ends: 141394 [2021-06-05 21:05:21,232 INFO L226 Difference]: Without dead ends: 141322 [2021-06-05 21:05:21,232 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 250.7ms TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:05:21,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141322 states. [2021-06-05 21:05:23,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141322 to 126703. [2021-06-05 21:05:24,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126703 states, 126702 states have (on average 4.370017837129643) internal successors, (553690), 126702 states have internal predecessors, (553690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:24,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126703 states to 126703 states and 553690 transitions. [2021-06-05 21:05:24,907 INFO L78 Accepts]: Start accepts. Automaton has 126703 states and 553690 transitions. Word has length 30 [2021-06-05 21:05:24,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:24,907 INFO L482 AbstractCegarLoop]: Abstraction has 126703 states and 553690 transitions. [2021-06-05 21:05:24,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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) [2021-06-05 21:05:24,907 INFO L276 IsEmpty]: Start isEmpty. Operand 126703 states and 553690 transitions. [2021-06-05 21:05:25,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:05:25,064 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:25,064 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] [2021-06-05 21:05:25,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 21:05:25,264 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:25,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:25,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1447640776, now seen corresponding path program 27 times [2021-06-05 21:05:25,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:25,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236880628] [2021-06-05 21:05:25,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:25,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:25,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:05:25,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:25,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236880628] [2021-06-05 21:05:25,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236880628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:25,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598079529] [2021-06-05 21:05:25,300 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:25,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:05:25,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:25,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:05:25,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:25,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:05:25,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598079529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:25,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:25,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:05:25,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343436268] [2021-06-05 21:05:25,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:05:25,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:25,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:05:25,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:05:25,428 INFO L87 Difference]: Start difference. First operand 126703 states and 553690 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:26,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:26,900 INFO L93 Difference]: Finished difference Result 141176 states and 611517 transitions. [2021-06-05 21:05:26,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:05:26,900 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 21:05:26,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:27,366 INFO L225 Difference]: With dead ends: 141176 [2021-06-05 21:05:27,367 INFO L226 Difference]: Without dead ends: 141132 [2021-06-05 21:05:27,367 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 223.2ms TimeCoverageRelationStatistics Valid=190, Invalid=460, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:05:27,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141132 states. [2021-06-05 21:05:29,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141132 to 126705. [2021-06-05 21:05:30,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126705 states, 126704 states have (on average 4.370067243338806) internal successors, (553705), 126704 states have internal predecessors, (553705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:30,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126705 states to 126705 states and 553705 transitions. [2021-06-05 21:05:30,931 INFO L78 Accepts]: Start accepts. Automaton has 126705 states and 553705 transitions. Word has length 30 [2021-06-05 21:05:30,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:30,932 INFO L482 AbstractCegarLoop]: Abstraction has 126705 states and 553705 transitions. [2021-06-05 21:05:30,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:30,932 INFO L276 IsEmpty]: Start isEmpty. Operand 126705 states and 553705 transitions. [2021-06-05 21:05:31,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:05:31,086 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:31,086 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] [2021-06-05 21:05:31,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:31,287 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:31,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:31,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1706436100, now seen corresponding path program 28 times [2021-06-05 21:05:31,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:31,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078424181] [2021-06-05 21:05:31,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:31,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:05:31,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:31,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078424181] [2021-06-05 21:05:31,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078424181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:31,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257238364] [2021-06-05 21:05:31,321 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:31,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:05:31,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:31,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:31,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:31,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:05:31,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:05:31,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:05:31,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:05:31,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-06-05 21:05:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:05:31,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257238364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:31,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:31,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:05:31,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556727397] [2021-06-05 21:05:31,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:05:31,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:31,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:05:31,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:05:31,460 INFO L87 Difference]: Start difference. First operand 126705 states and 553705 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-06-05 21:05:33,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:33,503 INFO L93 Difference]: Finished difference Result 149894 states and 645986 transitions. [2021-06-05 21:05:33,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 21:05:33,503 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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 30 [2021-06-05 21:05:33,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:33,971 INFO L225 Difference]: With dead ends: 149894 [2021-06-05 21:05:33,972 INFO L226 Difference]: Without dead ends: 149494 [2021-06-05 21:05:33,972 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 515.6ms TimeCoverageRelationStatistics Valid=240, Invalid=1400, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:05:34,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149494 states. [2021-06-05 21:05:36,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149494 to 129512. [2021-06-05 21:05:36,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129512 states, 129511 states have (on average 4.370130722486893) internal successors, (565980), 129511 states have internal predecessors, (565980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:37,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129512 states to 129512 states and 565980 transitions. [2021-06-05 21:05:37,667 INFO L78 Accepts]: Start accepts. Automaton has 129512 states and 565980 transitions. Word has length 30 [2021-06-05 21:05:37,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:37,667 INFO L482 AbstractCegarLoop]: Abstraction has 129512 states and 565980 transitions. [2021-06-05 21:05:37,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-06-05 21:05:37,667 INFO L276 IsEmpty]: Start isEmpty. Operand 129512 states and 565980 transitions. [2021-06-05 21:05:37,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:05:37,815 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:37,816 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] [2021-06-05 21:05:38,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 21:05:38,016 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:38,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:38,016 INFO L82 PathProgramCache]: Analyzing trace with hash 461248004, now seen corresponding path program 29 times [2021-06-05 21:05:38,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:38,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234312539] [2021-06-05 21:05:38,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:38,055 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:05:38,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:38,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234312539] [2021-06-05 21:05:38,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234312539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:38,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326577632] [2021-06-05 21:05:38,056 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:38,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:05:38,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:38,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:05:38,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:05:38,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326577632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:38,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:38,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:05:38,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167496975] [2021-06-05 21:05:38,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:05:38,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:38,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:05:38,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:05:38,178 INFO L87 Difference]: Start difference. First operand 129512 states and 565980 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-06-05 21:05:41,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:41,098 INFO L93 Difference]: Finished difference Result 214461 states and 912367 transitions. [2021-06-05 21:05:41,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 21:05:41,098 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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 30 [2021-06-05 21:05:41,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:41,804 INFO L225 Difference]: With dead ends: 214461 [2021-06-05 21:05:41,804 INFO L226 Difference]: Without dead ends: 212520 [2021-06-05 21:05:41,804 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 713.3ms TimeCoverageRelationStatistics Valid=726, Invalid=2030, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 21:05:42,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212520 states. [2021-06-05 21:05:45,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212520 to 132616. [2021-06-05 21:05:45,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132616 states, 132615 states have (on average 4.362892583795197) internal successors, (578585), 132615 states have internal predecessors, (578585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:46,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132616 states to 132616 states and 578585 transitions. [2021-06-05 21:05:46,110 INFO L78 Accepts]: Start accepts. Automaton has 132616 states and 578585 transitions. Word has length 30 [2021-06-05 21:05:46,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:46,110 INFO L482 AbstractCegarLoop]: Abstraction has 132616 states and 578585 transitions. [2021-06-05 21:05:46,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-06-05 21:05:46,110 INFO L276 IsEmpty]: Start isEmpty. Operand 132616 states and 578585 transitions. [2021-06-05 21:05:46,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:05:46,821 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:46,821 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] [2021-06-05 21:05:47,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:47,036 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:47,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:47,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1201227792, now seen corresponding path program 30 times [2021-06-05 21:05:47,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:47,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347098296] [2021-06-05 21:05:47,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:47,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:47,077 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:05:47,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:47,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347098296] [2021-06-05 21:05:47,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347098296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:47,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852430651] [2021-06-05 21:05:47,078 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:47,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:05:47,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:05:47,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:05:47,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:05:47,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852430651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:47,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:47,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 21:05:47,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291401743] [2021-06-05 21:05:47,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:05:47,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:47,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:05:47,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:05:47,189 INFO L87 Difference]: Start difference. First operand 132616 states and 578585 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:50,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:05:50,024 INFO L93 Difference]: Finished difference Result 300250 states and 1286549 transitions. [2021-06-05 21:05:50,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 21:05:50,025 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 21:05:50,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:05:51,547 INFO L225 Difference]: With dead ends: 300250 [2021-06-05 21:05:51,547 INFO L226 Difference]: Without dead ends: 300250 [2021-06-05 21:05:51,548 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 452.7ms TimeCoverageRelationStatistics Valid=418, Invalid=1304, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:05:51,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300250 states. [2021-06-05 21:05:56,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300250 to 212691. [2021-06-05 21:05:57,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212691 states, 212690 states have (on average 4.4037519394423805) internal successors, (936634), 212690 states have internal predecessors, (936634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:58,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212691 states to 212691 states and 936634 transitions. [2021-06-05 21:05:58,610 INFO L78 Accepts]: Start accepts. Automaton has 212691 states and 936634 transitions. Word has length 30 [2021-06-05 21:05:58,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:05:58,610 INFO L482 AbstractCegarLoop]: Abstraction has 212691 states and 936634 transitions. [2021-06-05 21:05:58,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:05:58,610 INFO L276 IsEmpty]: Start isEmpty. Operand 212691 states and 936634 transitions. [2021-06-05 21:05:58,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:05:58,830 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:05:58,830 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] [2021-06-05 21:05:59,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:59,031 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:05:59,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:05:59,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1407643986, now seen corresponding path program 31 times [2021-06-05 21:05:59,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:05:59,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75795145] [2021-06-05 21:05:59,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:05:59,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:05:59,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:05:59,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75795145] [2021-06-05 21:05:59,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75795145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:59,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064929560] [2021-06-05 21:05:59,073 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:05:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:05:59,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:05:59,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:05:59,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-06-05 21:05:59,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:05:59,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:05:59,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:05:59,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:20 [2021-06-05 21:05:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:05:59,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064929560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:05:59,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:05:59,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:05:59,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209261005] [2021-06-05 21:05:59,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:05:59,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:05:59,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:05:59,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:05:59,213 INFO L87 Difference]: Start difference. First operand 212691 states and 936634 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-06-05 21:06:00,328 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-06-05 21:06:04,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:04,026 INFO L93 Difference]: Finished difference Result 282236 states and 1220316 transitions. [2021-06-05 21:06:04,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 21:06:04,027 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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 30 [2021-06-05 21:06:04,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:05,539 INFO L225 Difference]: With dead ends: 282236 [2021-06-05 21:06:05,539 INFO L226 Difference]: Without dead ends: 281826 [2021-06-05 21:06:05,539 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1410.4ms TimeCoverageRelationStatistics Valid=560, Invalid=2410, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 21:06:05,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281826 states. [2021-06-05 21:06:10,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281826 to 224350. [2021-06-05 21:06:11,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224350 states, 224349 states have (on average 4.40408916464972) internal successors, (988053), 224349 states have internal predecessors, (988053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:12,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224350 states to 224350 states and 988053 transitions. [2021-06-05 21:06:12,505 INFO L78 Accepts]: Start accepts. Automaton has 224350 states and 988053 transitions. Word has length 30 [2021-06-05 21:06:12,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:12,505 INFO L482 AbstractCegarLoop]: Abstraction has 224350 states and 988053 transitions. [2021-06-05 21:06:12,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-06-05 21:06:12,505 INFO L276 IsEmpty]: Start isEmpty. Operand 224350 states and 988053 transitions. [2021-06-05 21:06:12,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:06:12,758 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:12,758 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] [2021-06-05 21:06:12,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:12,958 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:12,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:12,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1625498796, now seen corresponding path program 32 times [2021-06-05 21:06:12,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:12,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822918522] [2021-06-05 21:06:12,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:12,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:12,996 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:06:12,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:12,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822918522] [2021-06-05 21:06:12,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822918522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:12,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195115974] [2021-06-05 21:06:12,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:13,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:06:13,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:13,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:06:13,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:13,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:06:13,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195115974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:13,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:13,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:06:13,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903910286] [2021-06-05 21:06:13,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:06:13,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:13,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:06:13,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:06:13,120 INFO L87 Difference]: Start difference. First operand 224350 states and 988053 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-06-05 21:06:18,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:18,937 INFO L93 Difference]: Finished difference Result 486397 states and 2091172 transitions. [2021-06-05 21:06:18,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 21:06:18,938 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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 30 [2021-06-05 21:06:18,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:21,340 INFO L225 Difference]: With dead ends: 486397 [2021-06-05 21:06:21,340 INFO L226 Difference]: Without dead ends: 483934 [2021-06-05 21:06:21,341 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2369 ImplicationChecksByTransitivity, 1231.8ms TimeCoverageRelationStatistics Valid=1330, Invalid=5810, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 21:06:21,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483934 states. [2021-06-05 21:06:29,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483934 to 267199. [2021-06-05 21:06:30,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267199 states, 267198 states have (on average 4.399258227980749) internal successors, (1175473), 267198 states have internal predecessors, (1175473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:31,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267199 states to 267199 states and 1175473 transitions. [2021-06-05 21:06:31,807 INFO L78 Accepts]: Start accepts. Automaton has 267199 states and 1175473 transitions. Word has length 30 [2021-06-05 21:06:31,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:31,807 INFO L482 AbstractCegarLoop]: Abstraction has 267199 states and 1175473 transitions. [2021-06-05 21:06:31,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-06-05 21:06:31,807 INFO L276 IsEmpty]: Start isEmpty. Operand 267199 states and 1175473 transitions. [2021-06-05 21:06:32,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 21:06:32,722 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:32,722 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] [2021-06-05 21:06:32,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:32,938 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:32,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:32,938 INFO L82 PathProgramCache]: Analyzing trace with hash -154432502, now seen corresponding path program 33 times [2021-06-05 21:06:32,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:32,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250261557] [2021-06-05 21:06:32,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:32,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:06:32,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:32,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250261557] [2021-06-05 21:06:32,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250261557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:32,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598392492] [2021-06-05 21:06:32,987 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:33,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:06:33,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:33,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:06:33,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:06:33,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598392492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:33,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:33,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:06:33,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610093161] [2021-06-05 21:06:33,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:06:33,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:33,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:06:33,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:06:33,086 INFO L87 Difference]: Start difference. First operand 267199 states and 1175473 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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) [2021-06-05 21:06:36,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:36,751 INFO L93 Difference]: Finished difference Result 404661 states and 1760197 transitions. [2021-06-05 21:06:36,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:06:36,751 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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 30 [2021-06-05 21:06:36,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:38,849 INFO L225 Difference]: With dead ends: 404661 [2021-06-05 21:06:38,849 INFO L226 Difference]: Without dead ends: 403634 [2021-06-05 21:06:38,849 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 307.6ms TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:06:39,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403634 states. [2021-06-05 21:06:44,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403634 to 196954. [2021-06-05 21:06:44,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196954 states, 196953 states have (on average 4.401897914730926) internal successors, (866967), 196953 states have internal predecessors, (866967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:45,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196954 states to 196954 states and 866967 transitions. [2021-06-05 21:06:45,421 INFO L78 Accepts]: Start accepts. Automaton has 196954 states and 866967 transitions. Word has length 30 [2021-06-05 21:06:45,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:45,421 INFO L482 AbstractCegarLoop]: Abstraction has 196954 states and 866967 transitions. [2021-06-05 21:06:45,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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) [2021-06-05 21:06:45,421 INFO L276 IsEmpty]: Start isEmpty. Operand 196954 states and 866967 transitions. [2021-06-05 21:06:46,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:06:46,290 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:46,290 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:06:46,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 21:06:46,505 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:46,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:46,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1759456308, now seen corresponding path program 34 times [2021-06-05 21:06:46,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:46,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142820299] [2021-06-05 21:06:46,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:46,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:06:46,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:46,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142820299] [2021-06-05 21:06:46,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142820299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:46,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719209942] [2021-06-05 21:06:46,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:46,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:06:46,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:06:46,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:06:46,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:46,689 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:06:46,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719209942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:46,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:46,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 21:06:46,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329819134] [2021-06-05 21:06:46,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:06:46,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:46,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:06:46,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:06:46,689 INFO L87 Difference]: Start difference. First operand 196954 states and 866967 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:48,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:06:48,912 INFO L93 Difference]: Finished difference Result 299970 states and 1308288 transitions. [2021-06-05 21:06:48,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:06:48,913 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:06:48,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:06:50,985 INFO L225 Difference]: With dead ends: 299970 [2021-06-05 21:06:50,985 INFO L226 Difference]: Without dead ends: 297610 [2021-06-05 21:06:50,985 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 147.3ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:06:51,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297610 states. [2021-06-05 21:06:57,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297610 to 245260. [2021-06-05 21:06:57,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245260 states, 245259 states have (on average 4.444477063023172) internal successors, (1090048), 245259 states have internal predecessors, (1090048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:59,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245260 states to 245260 states and 1090048 transitions. [2021-06-05 21:06:59,045 INFO L78 Accepts]: Start accepts. Automaton has 245260 states and 1090048 transitions. Word has length 33 [2021-06-05 21:06:59,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:06:59,045 INFO L482 AbstractCegarLoop]: Abstraction has 245260 states and 1090048 transitions. [2021-06-05 21:06:59,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:06:59,045 INFO L276 IsEmpty]: Start isEmpty. Operand 245260 states and 1090048 transitions. [2021-06-05 21:06:59,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:06:59,371 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:06:59,371 INFO L554 BasicCegarLoop]: trace histogram [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] [2021-06-05 21:06:59,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 21:06:59,572 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:06:59,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:06:59,572 INFO L82 PathProgramCache]: Analyzing trace with hash -843323476, now seen corresponding path program 1 times [2021-06-05 21:06:59,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:06:59,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545889630] [2021-06-05 21:06:59,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:06:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:59,659 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:06:59,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:06:59,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545889630] [2021-06-05 21:06:59,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545889630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:59,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298532562] [2021-06-05 21:06:59,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:06:59,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:06:59,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:06:59,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:06:59,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:06:59,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:06:59,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:06:59,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:06:59,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-06-05 21:06:59,790 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:06:59,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298532562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:06:59,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:06:59,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-06-05 21:06:59,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420732954] [2021-06-05 21:06:59,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:06:59,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:06:59,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:06:59,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:06:59,791 INFO L87 Difference]: Start difference. First operand 245260 states and 1090048 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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) [2021-06-05 21:07:02,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:02,497 INFO L93 Difference]: Finished difference Result 248659 states and 1102596 transitions. [2021-06-05 21:07:02,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:07:02,498 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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 [2021-06-05 21:07:02,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:03,378 INFO L225 Difference]: With dead ends: 248659 [2021-06-05 21:07:03,378 INFO L226 Difference]: Without dead ends: 248539 [2021-06-05 21:07:03,379 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 227.5ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:07:03,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248539 states. [2021-06-05 21:07:08,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248539 to 247204. [2021-06-05 21:07:08,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247204 states, 247203 states have (on average 4.439096612905183) internal successors, (1097358), 247203 states have internal predecessors, (1097358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:10,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247204 states to 247204 states and 1097358 transitions. [2021-06-05 21:07:10,234 INFO L78 Accepts]: Start accepts. Automaton has 247204 states and 1097358 transitions. Word has length 33 [2021-06-05 21:07:10,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:10,234 INFO L482 AbstractCegarLoop]: Abstraction has 247204 states and 1097358 transitions. [2021-06-05 21:07:10,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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) [2021-06-05 21:07:10,234 INFO L276 IsEmpty]: Start isEmpty. Operand 247204 states and 1097358 transitions. [2021-06-05 21:07:10,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:07:10,571 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:10,571 INFO L554 BasicCegarLoop]: trace histogram [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] [2021-06-05 21:07:10,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:10,772 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:10,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:10,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1857877874, now seen corresponding path program 1 times [2021-06-05 21:07:10,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:10,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31513620] [2021-06-05 21:07:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:10,867 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:07:10,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:10,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31513620] [2021-06-05 21:07:10,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31513620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:10,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721071041] [2021-06-05 21:07:10,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:10,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:10,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:10,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:07:11,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721071041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:11,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:11,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 21:07:11,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373761596] [2021-06-05 21:07:11,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:07:11,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:11,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:07:11,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:07:11,045 INFO L87 Difference]: Start difference. First operand 247204 states and 1097358 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:13,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:13,206 INFO L93 Difference]: Finished difference Result 249510 states and 1105535 transitions. [2021-06-05 21:07:13,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:07:13,206 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:07:13,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:14,683 INFO L225 Difference]: With dead ends: 249510 [2021-06-05 21:07:14,683 INFO L226 Difference]: Without dead ends: 248501 [2021-06-05 21:07:14,684 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 283.3ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:07:14,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248501 states. [2021-06-05 21:07:19,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248501 to 247941. [2021-06-05 21:07:20,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247941 states, 247940 states have (on average 4.436609663628297) internal successors, (1100013), 247940 states have internal predecessors, (1100013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:21,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247941 states to 247941 states and 1100013 transitions. [2021-06-05 21:07:21,123 INFO L78 Accepts]: Start accepts. Automaton has 247941 states and 1100013 transitions. Word has length 33 [2021-06-05 21:07:21,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:21,123 INFO L482 AbstractCegarLoop]: Abstraction has 247941 states and 1100013 transitions. [2021-06-05 21:07:21,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:21,123 INFO L276 IsEmpty]: Start isEmpty. Operand 247941 states and 1100013 transitions. [2021-06-05 21:07:22,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:07:22,068 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:22,069 INFO L554 BasicCegarLoop]: trace histogram [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] [2021-06-05 21:07:22,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 21:07:22,269 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:22,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:22,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1129985132, now seen corresponding path program 2 times [2021-06-05 21:07:22,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:22,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784195362] [2021-06-05 21:07:22,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:07:22,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:22,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784195362] [2021-06-05 21:07:22,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784195362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:22,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110475044] [2021-06-05 21:07:22,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:22,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:07:22,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:22,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:07:22,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:22,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:07:22,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:07:22,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:07:22,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:07:22,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-06-05 21:07:22,477 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:07:22,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110475044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:22,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:22,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-06-05 21:07:22,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463478611] [2021-06-05 21:07:22,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:07:22,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:22,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:07:22,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:07:22,478 INFO L87 Difference]: Start difference. First operand 247941 states and 1100013 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:24,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:24,762 INFO L93 Difference]: Finished difference Result 258027 states and 1137213 transitions. [2021-06-05 21:07:24,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:07:24,762 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:07:24,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:26,267 INFO L225 Difference]: With dead ends: 258027 [2021-06-05 21:07:26,267 INFO L226 Difference]: Without dead ends: 257921 [2021-06-05 21:07:26,267 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 269.4ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:07:26,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257921 states. [2021-06-05 21:07:31,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257921 to 249856. [2021-06-05 21:07:31,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249856 states, 249855 states have (on average 4.432294730943948) internal successors, (1107431), 249855 states have internal predecessors, (1107431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:33,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249856 states to 249856 states and 1107431 transitions. [2021-06-05 21:07:33,513 INFO L78 Accepts]: Start accepts. Automaton has 249856 states and 1107431 transitions. Word has length 33 [2021-06-05 21:07:33,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:33,513 INFO L482 AbstractCegarLoop]: Abstraction has 249856 states and 1107431 transitions. [2021-06-05 21:07:33,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:33,513 INFO L276 IsEmpty]: Start isEmpty. Operand 249856 states and 1107431 transitions. [2021-06-05 21:07:33,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:07:33,995 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:33,995 INFO L554 BasicCegarLoop]: trace histogram [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] [2021-06-05 21:07:34,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 21:07:34,209 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:34,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:34,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1036448618, now seen corresponding path program 2 times [2021-06-05 21:07:34,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:34,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276045810] [2021-06-05 21:07:34,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:34,324 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:07:34,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:34,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276045810] [2021-06-05 21:07:34,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276045810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:34,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729424813] [2021-06-05 21:07:34,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:34,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:07:34,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:34,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:34,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:07:34,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729424813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:34,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:34,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 21:07:34,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430325200] [2021-06-05 21:07:34,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:07:34,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:34,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:07:34,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:07:34,521 INFO L87 Difference]: Start difference. First operand 249856 states and 1107431 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:35,271 WARN L205 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-06-05 21:07:38,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:38,298 INFO L93 Difference]: Finished difference Result 251203 states and 1111360 transitions. [2021-06-05 21:07:38,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:07:38,298 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:07:38,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:39,490 INFO L225 Difference]: With dead ends: 251203 [2021-06-05 21:07:39,490 INFO L226 Difference]: Without dead ends: 250188 [2021-06-05 21:07:39,490 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1112.8ms TimeCoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:07:40,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250188 states. [2021-06-05 21:07:44,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250188 to 249232. [2021-06-05 21:07:44,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249232 states, 249231 states have (on average 4.431382933904691) internal successors, (1104438), 249231 states have internal predecessors, (1104438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:46,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249232 states to 249232 states and 1104438 transitions. [2021-06-05 21:07:46,187 INFO L78 Accepts]: Start accepts. Automaton has 249232 states and 1104438 transitions. Word has length 33 [2021-06-05 21:07:46,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:46,187 INFO L482 AbstractCegarLoop]: Abstraction has 249232 states and 1104438 transitions. [2021-06-05 21:07:46,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:46,187 INFO L276 IsEmpty]: Start isEmpty. Operand 249232 states and 1104438 transitions. [2021-06-05 21:07:46,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:07:46,501 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:46,502 INFO L554 BasicCegarLoop]: trace histogram [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] [2021-06-05 21:07:46,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:46,702 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:46,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:46,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1947467614, now seen corresponding path program 3 times [2021-06-05 21:07:46,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:46,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821193087] [2021-06-05 21:07:46,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:46,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:46,799 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:07:46,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:46,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821193087] [2021-06-05 21:07:46,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821193087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:46,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987093457] [2021-06-05 21:07:46,799 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:46,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:07:46,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:46,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:07:46,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:07:46,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987093457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:46,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:46,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 21:07:46,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598170070] [2021-06-05 21:07:46,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:07:46,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:46,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:07:46,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:07:46,985 INFO L87 Difference]: Start difference. First operand 249232 states and 1104438 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:47,640 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2021-06-05 21:07:49,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:07:49,913 INFO L93 Difference]: Finished difference Result 253243 states and 1118843 transitions. [2021-06-05 21:07:49,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:07:49,914 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:07:49,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:07:50,768 INFO L225 Difference]: With dead ends: 253243 [2021-06-05 21:07:50,768 INFO L226 Difference]: Without dead ends: 251565 [2021-06-05 21:07:50,768 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 935.5ms TimeCoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:07:51,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251565 states. [2021-06-05 21:07:55,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251565 to 250713. [2021-06-05 21:07:56,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250713 states, 250712 states have (on average 4.423908707999617) internal successors, (1109127), 250712 states have internal predecessors, (1109127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:57,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250713 states to 250713 states and 1109127 transitions. [2021-06-05 21:07:57,717 INFO L78 Accepts]: Start accepts. Automaton has 250713 states and 1109127 transitions. Word has length 33 [2021-06-05 21:07:57,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:07:57,717 INFO L482 AbstractCegarLoop]: Abstraction has 250713 states and 1109127 transitions. [2021-06-05 21:07:57,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:07:57,717 INFO L276 IsEmpty]: Start isEmpty. Operand 250713 states and 1109127 transitions. [2021-06-05 21:07:58,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:07:58,047 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:07:58,047 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:07:58,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:58,249 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:07:58,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:07:58,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1681201706, now seen corresponding path program 35 times [2021-06-05 21:07:58,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:07:58,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259688117] [2021-06-05 21:07:58,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:07:58,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:07:58,315 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:07:58,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:07:58,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259688117] [2021-06-05 21:07:58,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259688117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:58,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288485704] [2021-06-05 21:07:58,315 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:07:58,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:07:58,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:07:58,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:07:58,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:07:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:07:58,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288485704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:07:58,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:07:58,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 21:07:58,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573649026] [2021-06-05 21:07:58,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:07:58,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:07:58,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:07:58,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:07:58,431 INFO L87 Difference]: Start difference. First operand 250713 states and 1109127 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:02,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:02,490 INFO L93 Difference]: Finished difference Result 408902 states and 1783714 transitions. [2021-06-05 21:08:02,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:08:02,491 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:08:02,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:04,003 INFO L225 Difference]: With dead ends: 408902 [2021-06-05 21:08:04,003 INFO L226 Difference]: Without dead ends: 403086 [2021-06-05 21:08:04,003 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 200.6ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:08:04,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403086 states. [2021-06-05 21:08:13,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403086 to 323030. [2021-06-05 21:08:14,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323030 states, 323029 states have (on average 4.426342526522387) internal successors, (1429837), 323029 states have internal predecessors, (1429837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:16,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323030 states to 323030 states and 1429837 transitions. [2021-06-05 21:08:16,351 INFO L78 Accepts]: Start accepts. Automaton has 323030 states and 1429837 transitions. Word has length 33 [2021-06-05 21:08:16,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:16,351 INFO L482 AbstractCegarLoop]: Abstraction has 323030 states and 1429837 transitions. [2021-06-05 21:08:16,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:16,351 INFO L276 IsEmpty]: Start isEmpty. Operand 323030 states and 1429837 transitions. [2021-06-05 21:08:16,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:08:16,795 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:16,795 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:16,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:16,995 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:16,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:16,996 INFO L82 PathProgramCache]: Analyzing trace with hash -913135154, now seen corresponding path program 36 times [2021-06-05 21:08:16,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:16,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474590004] [2021-06-05 21:08:16,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:17,055 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:08:17,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:17,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474590004] [2021-06-05 21:08:17,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474590004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:17,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113477887] [2021-06-05 21:08:17,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:17,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:08:17,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:08:17,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:08:17,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:08:17,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113477887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:17,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:17,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2021-06-05 21:08:17,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522433747] [2021-06-05 21:08:17,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:08:17,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:17,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:08:17,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:08:17,268 INFO L87 Difference]: Start difference. First operand 323030 states and 1429837 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:21,279 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 21 [2021-06-05 21:08:23,437 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-06-05 21:08:28,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:28,448 INFO L93 Difference]: Finished difference Result 564498 states and 2414011 transitions. [2021-06-05 21:08:28,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-06-05 21:08:28,448 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:08:28,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:31,156 INFO L225 Difference]: With dead ends: 564498 [2021-06-05 21:08:31,156 INFO L226 Difference]: Without dead ends: 555301 [2021-06-05 21:08:31,158 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10906 ImplicationChecksByTransitivity, 4851.1ms TimeCoverageRelationStatistics Valid=3771, Invalid=24959, Unknown=0, NotChecked=0, Total=28730 [2021-06-05 21:08:31,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555301 states. [2021-06-05 21:08:44,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555301 to 426258. [2021-06-05 21:08:45,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426258 states, 426257 states have (on average 4.406536432246274) internal successors, (1878317), 426257 states have internal predecessors, (1878317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:47,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426258 states to 426258 states and 1878317 transitions. [2021-06-05 21:08:47,683 INFO L78 Accepts]: Start accepts. Automaton has 426258 states and 1878317 transitions. Word has length 33 [2021-06-05 21:08:47,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:08:47,684 INFO L482 AbstractCegarLoop]: Abstraction has 426258 states and 1878317 transitions. [2021-06-05 21:08:47,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:47,684 INFO L276 IsEmpty]: Start isEmpty. Operand 426258 states and 1878317 transitions. [2021-06-05 21:08:48,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:08:48,844 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:08:48,844 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:08:49,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:49,045 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:08:49,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:08:49,045 INFO L82 PathProgramCache]: Analyzing trace with hash -261102064, now seen corresponding path program 37 times [2021-06-05 21:08:49,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:08:49,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780257842] [2021-06-05 21:08:49,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:08:49,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:49,114 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:08:49,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:08:49,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780257842] [2021-06-05 21:08:49,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780257842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:49,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047741276] [2021-06-05 21:08:49,114 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:08:49,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:08:49,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 21:08:49,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:08:49,240 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 21:08:49,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047741276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:08:49,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:08:49,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 21:08:49,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404657825] [2021-06-05 21:08:49,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:08:49,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:08:49,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:08:49,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:08:49,244 INFO L87 Difference]: Start difference. First operand 426258 states and 1878317 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:08:54,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:08:54,241 INFO L93 Difference]: Finished difference Result 512157 states and 2229861 transitions. [2021-06-05 21:08:54,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:08:54,242 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:08:54,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:08:57,757 INFO L225 Difference]: With dead ends: 512157 [2021-06-05 21:08:57,757 INFO L226 Difference]: Without dead ends: 504596 [2021-06-05 21:08:57,758 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 277.3ms TimeCoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:08:58,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504596 states. [2021-06-05 21:09:10,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504596 to 450713. [2021-06-05 21:09:11,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450713 states, 450712 states have (on average 4.414107012904028) internal successors, (1989491), 450712 states have internal predecessors, (1989491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:13,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450713 states to 450713 states and 1989491 transitions. [2021-06-05 21:09:13,695 INFO L78 Accepts]: Start accepts. Automaton has 450713 states and 1989491 transitions. Word has length 33 [2021-06-05 21:09:13,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:13,695 INFO L482 AbstractCegarLoop]: Abstraction has 450713 states and 1989491 transitions. [2021-06-05 21:09:13,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:13,695 INFO L276 IsEmpty]: Start isEmpty. Operand 450713 states and 1989491 transitions. [2021-06-05 21:09:14,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:09:14,891 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:14,891 INFO L554 BasicCegarLoop]: trace histogram [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] [2021-06-05 21:09:15,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-05 21:09:15,105 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:15,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:15,105 INFO L82 PathProgramCache]: Analyzing trace with hash -766822484, now seen corresponding path program 1 times [2021-06-05 21:09:15,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:15,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708986178] [2021-06-05 21:09:15,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:15,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:15,203 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:09:15,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:15,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708986178] [2021-06-05 21:09:15,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708986178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:15,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072290829] [2021-06-05 21:09:15,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:15,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:15,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:09:15,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:15,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-06-05 21:09:15,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:09:15,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:09:15,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:09:15,292 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 21:09:15,332 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:09:15,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072290829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:15,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:15,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 21:09:15,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002720948] [2021-06-05 21:09:15,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:09:15,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:15,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:09:15,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:09:15,332 INFO L87 Difference]: Start difference. First operand 450713 states and 1989491 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 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) [2021-06-05 21:09:20,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:20,278 INFO L93 Difference]: Finished difference Result 464985 states and 2044238 transitions. [2021-06-05 21:09:20,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:09:20,293 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 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 [2021-06-05 21:09:20,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:22,136 INFO L225 Difference]: With dead ends: 464985 [2021-06-05 21:09:22,137 INFO L226 Difference]: Without dead ends: 464885 [2021-06-05 21:09:22,137 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 336.1ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:09:23,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464885 states. [2021-06-05 21:09:32,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464885 to 456514. [2021-06-05 21:09:33,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456514 states, 456513 states have (on average 4.410663004120365) internal successors, (2013525), 456513 states have internal predecessors, (2013525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:37,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456514 states to 456514 states and 2013525 transitions. [2021-06-05 21:09:37,995 INFO L78 Accepts]: Start accepts. Automaton has 456514 states and 2013525 transitions. Word has length 33 [2021-06-05 21:09:37,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:09:37,995 INFO L482 AbstractCegarLoop]: Abstraction has 456514 states and 2013525 transitions. [2021-06-05 21:09:37,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 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) [2021-06-05 21:09:37,995 INFO L276 IsEmpty]: Start isEmpty. Operand 456514 states and 2013525 transitions. [2021-06-05 21:09:39,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:09:39,054 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:09:39,054 INFO L554 BasicCegarLoop]: trace histogram [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] [2021-06-05 21:09:39,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:39,270 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:09:39,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:09:39,270 INFO L82 PathProgramCache]: Analyzing trace with hash 149310348, now seen corresponding path program 1 times [2021-06-05 21:09:39,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:09:39,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139786178] [2021-06-05 21:09:39,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:09:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:09:39,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:09:39,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139786178] [2021-06-05 21:09:39,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139786178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:39,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463048755] [2021-06-05 21:09:39,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:09:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:09:39,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:09:39,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:09:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:09:39,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463048755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:09:39,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:09:39,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 21:09:39,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548952074] [2021-06-05 21:09:39,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:09:39,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:09:39,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:09:39,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:09:39,710 INFO L87 Difference]: Start difference. First operand 456514 states and 2013525 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:09:40,615 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-06-05 21:09:45,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:09:45,244 INFO L93 Difference]: Finished difference Result 472414 states and 2075820 transitions. [2021-06-05 21:09:45,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:09:45,249 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:09:45,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:09:49,048 INFO L225 Difference]: With dead ends: 472414 [2021-06-05 21:09:49,048 INFO L226 Difference]: Without dead ends: 471727 [2021-06-05 21:09:49,048 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 926.2ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:09:49,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471727 states. [2021-06-05 21:10:00,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471727 to 467183. [2021-06-05 21:10:00,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467183 states, 467182 states have (on average 4.405914611436228) internal successors, (2058364), 467182 states have internal predecessors, (2058364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:05,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467183 states to 467183 states and 2058364 transitions. [2021-06-05 21:10:05,595 INFO L78 Accepts]: Start accepts. Automaton has 467183 states and 2058364 transitions. Word has length 33 [2021-06-05 21:10:05,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:05,595 INFO L482 AbstractCegarLoop]: Abstraction has 467183 states and 2058364 transitions. [2021-06-05 21:10:05,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:05,595 INFO L276 IsEmpty]: Start isEmpty. Operand 467183 states and 2058364 transitions. [2021-06-05 21:10:06,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:10:06,775 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:06,775 INFO L554 BasicCegarLoop]: trace histogram [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] [2021-06-05 21:10:06,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:06,985 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:06,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:06,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1888066322, now seen corresponding path program 2 times [2021-06-05 21:10:06,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:06,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674592592] [2021-06-05 21:10:06,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:07,136 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:07,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:07,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674592592] [2021-06-05 21:10:07,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674592592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:07,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565162350] [2021-06-05 21:10:07,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:07,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:10:07,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:07,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:10:07,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:07,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:10:07,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:10:07,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:10:07,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:10:07,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 21:10:07,291 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:07,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565162350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:07,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:07,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 21:10:07,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045782037] [2021-06-05 21:10:07,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:10:07,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:07,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:10:07,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:10:07,292 INFO L87 Difference]: Start difference. First operand 467183 states and 2058364 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-06-05 21:10:12,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:12,683 INFO L93 Difference]: Finished difference Result 463049 states and 2040755 transitions. [2021-06-05 21:10:12,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:10:12,683 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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 33 [2021-06-05 21:10:12,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:16,451 INFO L225 Difference]: With dead ends: 463049 [2021-06-05 21:10:16,451 INFO L226 Difference]: Without dead ends: 462788 [2021-06-05 21:10:16,452 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 274.7ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:10:16,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462788 states. [2021-06-05 21:10:26,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462788 to 461080. [2021-06-05 21:10:27,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461080 states, 461079 states have (on average 4.4107495678614725) internal successors, (2033704), 461079 states have internal predecessors, (2033704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:31,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461080 states to 461080 states and 2033704 transitions. [2021-06-05 21:10:31,909 INFO L78 Accepts]: Start accepts. Automaton has 461080 states and 2033704 transitions. Word has length 33 [2021-06-05 21:10:31,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:31,909 INFO L482 AbstractCegarLoop]: Abstraction has 461080 states and 2033704 transitions. [2021-06-05 21:10:31,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-06-05 21:10:31,909 INFO L276 IsEmpty]: Start isEmpty. Operand 461080 states and 2033704 transitions. [2021-06-05 21:10:33,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:10:33,101 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:33,101 INFO L554 BasicCegarLoop]: trace histogram [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] [2021-06-05 21:10:33,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 21:10:33,321 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:33,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:33,322 INFO L82 PathProgramCache]: Analyzing trace with hash 223413042, now seen corresponding path program 1 times [2021-06-05 21:10:33,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:33,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128738227] [2021-06-05 21:10:33,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:33,563 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:33,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:33,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128738227] [2021-06-05 21:10:33,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128738227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:33,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526432067] [2021-06-05 21:10:33,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:10:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:33,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:10:33,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:33,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526432067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:33,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:33,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 21:10:33,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730005335] [2021-06-05 21:10:33,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:10:33,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:33,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:10:33,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:10:33,796 INFO L87 Difference]: Start difference. First operand 461080 states and 2033704 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:39,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:10:39,306 INFO L93 Difference]: Finished difference Result 461705 states and 2035624 transitions. [2021-06-05 21:10:39,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:10:39,306 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:10:39,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:10:41,082 INFO L225 Difference]: With dead ends: 461705 [2021-06-05 21:10:41,083 INFO L226 Difference]: Without dead ends: 461265 [2021-06-05 21:10:41,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 374.5ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:10:42,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461265 states. [2021-06-05 21:10:51,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461265 to 461051. [2021-06-05 21:10:51,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461051 states, 461050 states have (on average 4.410781910855656) internal successors, (2033591), 461050 states have internal predecessors, (2033591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:56,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461051 states to 461051 states and 2033591 transitions. [2021-06-05 21:10:56,188 INFO L78 Accepts]: Start accepts. Automaton has 461051 states and 2033591 transitions. Word has length 33 [2021-06-05 21:10:56,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:10:56,188 INFO L482 AbstractCegarLoop]: Abstraction has 461051 states and 2033591 transitions. [2021-06-05 21:10:56,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:10:56,188 INFO L276 IsEmpty]: Start isEmpty. Operand 461051 states and 2033591 transitions. [2021-06-05 21:10:57,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:10:57,291 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:10:57,292 INFO L554 BasicCegarLoop]: trace histogram [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] [2021-06-05 21:10:57,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 21:10:57,509 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:10:57,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:10:57,509 INFO L82 PathProgramCache]: Analyzing trace with hash 220197682, now seen corresponding path program 2 times [2021-06-05 21:10:57,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:10:57,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846509331] [2021-06-05 21:10:57,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:10:57,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:10:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:57,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:10:57,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846509331] [2021-06-05 21:10:57,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846509331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:57,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548843767] [2021-06-05 21:10:57,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:10:57,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:10:57,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:10:57,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:10:57,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:10:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:10:57,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548843767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:10:57,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:10:57,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 21:10:57,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105624963] [2021-06-05 21:10:57,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:10:57,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:10:57,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:10:57,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:10:57,884 INFO L87 Difference]: Start difference. First operand 461051 states and 2033591 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:03,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:03,668 INFO L93 Difference]: Finished difference Result 466128 states and 2051334 transitions. [2021-06-05 21:11:03,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:11:03,669 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:11:03,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:07,065 INFO L225 Difference]: With dead ends: 466128 [2021-06-05 21:11:07,065 INFO L226 Difference]: Without dead ends: 465302 [2021-06-05 21:11:07,065 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 342.4ms TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:11:07,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465302 states. [2021-06-05 21:11:17,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465302 to 460987. [2021-06-05 21:11:18,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460987 states, 460986 states have (on average 4.411233746794913) internal successors, (2033517), 460986 states have internal predecessors, (2033517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:22,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460987 states to 460987 states and 2033517 transitions. [2021-06-05 21:11:22,470 INFO L78 Accepts]: Start accepts. Automaton has 460987 states and 2033517 transitions. Word has length 33 [2021-06-05 21:11:22,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:22,470 INFO L482 AbstractCegarLoop]: Abstraction has 460987 states and 2033517 transitions. [2021-06-05 21:11:22,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:22,471 INFO L276 IsEmpty]: Start isEmpty. Operand 460987 states and 2033517 transitions. [2021-06-05 21:11:23,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:11:23,474 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:23,475 INFO L554 BasicCegarLoop]: trace histogram [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] [2021-06-05 21:11:23,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:23,681 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:23,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:23,681 INFO L82 PathProgramCache]: Analyzing trace with hash -168380372, now seen corresponding path program 3 times [2021-06-05 21:11:23,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:23,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939829546] [2021-06-05 21:11:23,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:23,819 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:11:23,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:23,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939829546] [2021-06-05 21:11:23,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939829546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:23,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393243508] [2021-06-05 21:11:23,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:23,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:11:23,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:23,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:11:23,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:23,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:11:23,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:11:23,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:11:23,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:11:23,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 21:11:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:11:23,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393243508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:23,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:23,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 21:11:23,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701695952] [2021-06-05 21:11:23,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:11:23,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:23,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:11:23,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:11:23,977 INFO L87 Difference]: Start difference. First operand 460987 states and 2033517 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:29,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:29,430 INFO L93 Difference]: Finished difference Result 462803 states and 2040315 transitions. [2021-06-05 21:11:29,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:11:29,431 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:11:29,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:33,272 INFO L225 Difference]: With dead ends: 462803 [2021-06-05 21:11:33,272 INFO L226 Difference]: Without dead ends: 462803 [2021-06-05 21:11:33,273 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 266.6ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:11:33,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462803 states. [2021-06-05 21:11:43,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462803 to 460848. [2021-06-05 21:11:44,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460848 states, 460847 states have (on average 4.411310044331416) internal successors, (2032939), 460847 states have internal predecessors, (2032939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:48,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460848 states to 460848 states and 2032939 transitions. [2021-06-05 21:11:48,807 INFO L78 Accepts]: Start accepts. Automaton has 460848 states and 2032939 transitions. Word has length 33 [2021-06-05 21:11:48,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:11:48,807 INFO L482 AbstractCegarLoop]: Abstraction has 460848 states and 2032939 transitions. [2021-06-05 21:11:48,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:48,807 INFO L276 IsEmpty]: Start isEmpty. Operand 460848 states and 2032939 transitions. [2021-06-05 21:11:49,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:11:49,573 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:11:49,573 INFO L554 BasicCegarLoop]: trace histogram [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] [2021-06-05 21:11:49,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:49,789 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:11:49,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:11:49,789 INFO L82 PathProgramCache]: Analyzing trace with hash 2122618956, now seen corresponding path program 3 times [2021-06-05 21:11:49,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:11:49,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077832450] [2021-06-05 21:11:49,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:11:49,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:11:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:11:49,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:11:49,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077832450] [2021-06-05 21:11:49,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077832450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:49,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242567416] [2021-06-05 21:11:49,955 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:11:49,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:11:49,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:11:49,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:11:49,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:11:50,184 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:11:50,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242567416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:11:50,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:11:50,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 21:11:50,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739402756] [2021-06-05 21:11:50,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:11:50,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:11:50,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:11:50,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:11:50,185 INFO L87 Difference]: Start difference. First operand 460848 states and 2032939 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:11:56,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:11:56,178 INFO L93 Difference]: Finished difference Result 466776 states and 2054354 transitions. [2021-06-05 21:11:56,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:11:56,178 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:11:56,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:11:58,080 INFO L225 Difference]: With dead ends: 466776 [2021-06-05 21:11:58,080 INFO L226 Difference]: Without dead ends: 466420 [2021-06-05 21:11:58,080 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 406.2ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:11:59,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466420 states. [2021-06-05 21:12:09,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466420 to 460252. [2021-06-05 21:12:09,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460252 states, 460251 states have (on average 4.412092532118344) internal successors, (2030670), 460251 states have internal predecessors, (2030670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:14,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460252 states to 460252 states and 2030670 transitions. [2021-06-05 21:12:14,128 INFO L78 Accepts]: Start accepts. Automaton has 460252 states and 2030670 transitions. Word has length 33 [2021-06-05 21:12:14,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:14,128 INFO L482 AbstractCegarLoop]: Abstraction has 460252 states and 2030670 transitions. [2021-06-05 21:12:14,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:14,128 INFO L276 IsEmpty]: Start isEmpty. Operand 460252 states and 2030670 transitions. [2021-06-05 21:12:15,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:12:15,005 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:15,005 INFO L554 BasicCegarLoop]: trace histogram [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] [2021-06-05 21:12:15,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:15,221 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:15,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:15,221 INFO L82 PathProgramCache]: Analyzing trace with hash -2101564566, now seen corresponding path program 2 times [2021-06-05 21:12:15,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:15,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320339623] [2021-06-05 21:12:15,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:12:15,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:15,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320339623] [2021-06-05 21:12:15,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320339623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:15,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185811927] [2021-06-05 21:12:15,444 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:15,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:12:15,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:15,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:12:15,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:15,726 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:12:15,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185811927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:15,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:15,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 21:12:15,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488507007] [2021-06-05 21:12:15,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:12:15,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:15,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:12:15,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:12:15,727 INFO L87 Difference]: Start difference. First operand 460252 states and 2030670 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:21,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:21,415 INFO L93 Difference]: Finished difference Result 460656 states and 2031820 transitions. [2021-06-05 21:12:21,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:12:21,415 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 21:12:21,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:23,978 INFO L225 Difference]: With dead ends: 460656 [2021-06-05 21:12:23,978 INFO L226 Difference]: Without dead ends: 460039 [2021-06-05 21:12:23,978 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 412.2ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:12:24,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460039 states. [2021-06-05 21:12:33,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460039 to 460039. [2021-06-05 21:12:33,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460039 states, 460038 states have (on average 4.412502880196853) internal successors, (2029919), 460038 states have internal predecessors, (2029919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:38,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460039 states to 460039 states and 2029919 transitions. [2021-06-05 21:12:38,276 INFO L78 Accepts]: Start accepts. Automaton has 460039 states and 2029919 transitions. Word has length 33 [2021-06-05 21:12:38,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:12:38,276 INFO L482 AbstractCegarLoop]: Abstraction has 460039 states and 2029919 transitions. [2021-06-05 21:12:38,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:12:38,276 INFO L276 IsEmpty]: Start isEmpty. Operand 460039 states and 2029919 transitions. [2021-06-05 21:12:39,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:12:39,104 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:12:39,104 INFO L554 BasicCegarLoop]: trace histogram [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] [2021-06-05 21:12:39,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:39,317 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:12:39,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:12:39,317 INFO L82 PathProgramCache]: Analyzing trace with hash 874139778, now seen corresponding path program 4 times [2021-06-05 21:12:39,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:12:39,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451795271] [2021-06-05 21:12:39,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:12:39,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:12:39,453 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:12:39,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:12:39,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451795271] [2021-06-05 21:12:39,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451795271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:39,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979025200] [2021-06-05 21:12:39,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:12:39,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:12:39,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:12:39,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:12:39,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:12:39,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:12:39,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:12:39,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:12:39,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:12:39,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 21:12:39,613 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:12:39,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979025200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:12:39,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:12:39,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 21:12:39,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431395361] [2021-06-05 21:12:39,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:12:39,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:12:39,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:12:39,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:12:39,614 INFO L87 Difference]: Start difference. First operand 460039 states and 2029919 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-06-05 21:12:40,265 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2021-06-05 21:12:45,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:12:45,309 INFO L93 Difference]: Finished difference Result 463912 states and 2044117 transitions. [2021-06-05 21:12:45,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:12:45,310 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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 33 [2021-06-05 21:12:45,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:12:49,190 INFO L225 Difference]: With dead ends: 463912 [2021-06-05 21:12:49,190 INFO L226 Difference]: Without dead ends: 463864 [2021-06-05 21:12:49,190 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 721.5ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:12:49,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463864 states. [2021-06-05 21:12:58,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463864 to 460655. [2021-06-05 21:12:59,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460655 states, 460654 states have (on average 4.411406391782118) internal successors, (2032132), 460654 states have internal predecessors, (2032132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:03,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460655 states to 460655 states and 2032132 transitions. [2021-06-05 21:13:03,815 INFO L78 Accepts]: Start accepts. Automaton has 460655 states and 2032132 transitions. Word has length 33 [2021-06-05 21:13:03,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:03,815 INFO L482 AbstractCegarLoop]: Abstraction has 460655 states and 2032132 transitions. [2021-06-05 21:13:03,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-06-05 21:13:03,816 INFO L276 IsEmpty]: Start isEmpty. Operand 460655 states and 2032132 transitions. [2021-06-05 21:13:04,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 21:13:04,802 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:04,802 INFO L554 BasicCegarLoop]: trace histogram [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] [2021-06-05 21:13:05,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:05,017 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:05,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:05,018 INFO L82 PathProgramCache]: Analyzing trace with hash -790513502, now seen corresponding path program 3 times [2021-06-05 21:13:05,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:05,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447654884] [2021-06-05 21:13:05,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:05,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:05,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:05,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447654884] [2021-06-05 21:13:05,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447654884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:05,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538435811] [2021-06-05 21:13:05,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:05,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:13:05,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:05,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:13:05,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:05,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538435811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:05,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:05,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 21:13:05,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315218932] [2021-06-05 21:13:05,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:13:05,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:05,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:13:05,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:13:05,496 INFO L87 Difference]: Start difference. First operand 460655 states and 2032132 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 21:13:10,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:13:10,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-05 21:13:10,217 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 21:13:10,219 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 21:13:10,220 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 21:13:10,220 INFO L202 PluginConnector]: Adding new model array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 09:13:10 BasicIcfg [2021-06-05 21:13:10,220 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 21:13:10,221 INFO L168 Benchmark]: Toolchain (without parser) took 581624.88 ms. Allocated memory was 341.8 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 321.4 MB in the beginning and 9.8 GB in the end (delta: -9.5 GB). Peak memory consumption was 9.6 GB. Max. memory is 16.0 GB. [2021-06-05 21:13:10,221 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 341.8 MB. Free memory was 322.6 MB in the beginning and 322.5 MB in the end (delta: 70.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 21:13:10,221 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.73 ms. Allocated memory is still 341.8 MB. Free memory was 321.3 MB in the beginning and 319.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 21:13:10,221 INFO L168 Benchmark]: Boogie Preprocessor took 30.91 ms. Allocated memory is still 341.8 MB. Free memory was 319.8 MB in the beginning and 318.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 21:13:10,221 INFO L168 Benchmark]: RCFGBuilder took 177.80 ms. Allocated memory is still 341.8 MB. Free memory was 318.7 MB in the beginning and 305.9 MB in the end (delta: 12.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-06-05 21:13:10,221 INFO L168 Benchmark]: TraceAbstraction took 581392.16 ms. Allocated memory was 341.8 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 305.5 MB in the beginning and 9.8 GB in the end (delta: -9.5 GB). Peak memory consumption was 9.6 GB. Max. memory is 16.0 GB. [2021-06-05 21:13:10,221 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 341.8 MB. Free memory was 322.6 MB in the beginning and 322.5 MB in the end (delta: 70.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.73 ms. Allocated memory is still 341.8 MB. Free memory was 321.3 MB in the beginning and 319.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 30.91 ms. Allocated memory is still 341.8 MB. Free memory was 319.8 MB in the beginning and 318.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 177.80 ms. Allocated memory is still 341.8 MB. Free memory was 318.7 MB in the beginning and 305.9 MB in the end (delta: 12.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 581392.16 ms. Allocated memory was 341.8 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 305.5 MB in the beginning and 9.8 GB in the end (delta: -9.5 GB). Peak memory consumption was 9.6 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (460655states) and FLOYD_HOARE automaton (currently 12 states, 20 states before enhancement),while ReachableStatesComputation was computing reachable states (393217 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 51 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 581288.1ms, OverallIterations: 90, TraceHistogramMax: 2, EmptinessCheckTime: 20304.9ms, AutomataDifference: 212955.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 43.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6231 SDtfs, 24676 SDslu, 40544 SDs, 0 SdLazy, 65213 SolverSat, 2079 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 24216.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4045 GetRequests, 1914 SyntacticMatches, 34 SemanticMatches, 2097 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25379 ImplicationChecksByTransitivity, 32107.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=467183occurred in iteration=82, InterpolantAutomatonStates: 1769, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 312642.1ms AutomataMinimizationTime, 89 MinimizatonAttempts, 1453234 StatesRemovedByMinimization, 87 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 290.3ms SsaConstructionTime, 979.4ms SatisfiabilityAnalysisTime, 14730.5ms InterpolantComputationTime, 4824 NumberOfCodeBlocks, 4812 NumberOfCodeBlocksAsserted, 272 NumberOfCheckSat, 4650 ConstructedInterpolants, 0 QuantifiedInterpolants, 55171 SizeOfPredicates, 488 NumberOfNonLiveVariables, 6281 ConjunctsInSsa, 1048 ConjunctsInUnsatCore, 174 InterpolantComputations, 8 PerfectInterpolantSequences, 480/1436 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown !SESSION 2021-06-05 21:03:27.231 ----------------------------------------------- eclipse.buildId=unknown java.version=11.0.11 java.vendor=Debian BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US Framework arguments: -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/array-eq-trans.wvr.bpl Command-line arguments: -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/array-eq-trans.wvr.bpl !ENTRY org.eclipse.osgi 4 0 2021-06-05 21:13:10.470 !MESSAGE Application error !STACK 1 org.eclipse.core.internal.resources.ResourceException(/)[568]: java.io.FileNotFoundException: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/763570eda/.metadata/.plugins/org.eclipse.core.resources/.root/1.tree (No such file or directory) at java.base/java.io.FileOutputStream.open0(Native Method) at java.base/java.io.FileOutputStream.open(FileOutputStream.java:298) at java.base/java.io.FileOutputStream.(FileOutputStream.java:237) at java.base/java.io.FileOutputStream.(FileOutputStream.java:187) at org.eclipse.core.internal.localstore.SafeFileOutputStream.(SafeFileOutputStream.java:55) at org.eclipse.core.internal.resources.SaveManager.saveTree(SaveManager.java:1381) at org.eclipse.core.internal.resources.SaveManager.save(SaveManager.java:1168) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2333) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2322) at de.uni_freiburg.informatik.ultimate.core.coreplugin.UltimateCore.start(UltimateCore.java:191) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:657) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:594) at org.eclipse.equinox.launcher.Main.run(Main.java:1465) at org.eclipse.equinox.launcher.Main.main(Main.java:1438) An error has occurred. See the log file /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/763570eda/.metadata/.log.