/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-queue.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-98707888a4ba860d5b57d27ee0e051c5b948cbbf-9870788 [2021-06-01 19:44:34,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-01 19:44:34,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-01 19:44:34,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-01 19:44:35,002 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-01 19:44:35,021 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-01 19:44:35,021 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-01 19:44:35,022 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-01 19:44:35,022 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-01 19:44:35,023 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-01 19:44:35,023 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-01 19:44:35,023 INFO L138 SettingsManager]: * Use SBE=true [2021-06-01 19:44:35,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-01 19:44:35,024 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-01 19:44:35,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-01 19:44:35,024 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-01 19:44:35,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-01 19:44:35,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-01 19:44:35,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-01 19:44:35,025 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-01 19:44:35,025 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-01 19:44:35,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-01 19:44:35,025 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-01 19:44:35,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-01 19:44:35,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-01 19:44:35,026 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-01 19:44:35,026 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-01 19:44:35,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-01 19:44:35,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-01 19:44:35,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-01 19:44:35,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-01 19:44:35,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-01 19:44:35,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-01 19:44:35,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-01 19:44:35,027 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-01 19:44:35,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-01 19:44:35,028 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-01 19:44:35,334 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-01 19:44:35,351 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-01 19:44:35,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-01 19:44:35,354 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-01 19:44:35,355 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-01 19:44:35,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-queue.wvr.bpl [2021-06-01 19:44:35,357 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-queue.wvr.bpl' [2021-06-01 19:44:35,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-01 19:44:35,393 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-01 19:44:35,394 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-01 19:44:35,394 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-01 19:44:35,394 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-01 19:44:35,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 07:44:35" (1/1) ... [2021-06-01 19:44:35,413 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 07:44:35" (1/1) ... [2021-06-01 19:44:35,420 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-01 19:44:35,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-01 19:44:35,422 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-01 19:44:35,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-01 19:44:35,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 07:44:35" (1/1) ... [2021-06-01 19:44:35,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 07:44:35" (1/1) ... [2021-06-01 19:44:35,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 07:44:35" (1/1) ... [2021-06-01 19:44:35,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 07:44:35" (1/1) ... [2021-06-01 19:44:35,431 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 07:44:35" (1/1) ... [2021-06-01 19:44:35,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 07:44:35" (1/1) ... [2021-06-01 19:44:35,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 07:44:35" (1/1) ... [2021-06-01 19:44:35,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-01 19:44:35,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-01 19:44:35,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-01 19:44:35,437 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-01 19:44:35,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 07:44:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-01 19:44:35,501 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-01 19:44:35,502 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-01 19:44:35,502 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-01 19:44:35,502 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-01 19:44:35,502 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-01 19:44:35,502 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-01 19:44:35,502 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-01 19:44:35,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-01 19:44:35,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-01 19:44:35,503 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-01 19:44:35,658 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-01 19:44:35,658 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-01 19:44:35,659 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-01 19:44:35,659 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-01 19:44:35,660 INFO L202 PluginConnector]: Adding new model simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.06 07:44:35 BoogieIcfgContainer [2021-06-01 19:44:35,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-01 19:44:35,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-01 19:44:35,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-01 19:44:35,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-01 19:44:35,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 07:44:35" (1/2) ... [2021-06-01 19:44:35,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@775966a and model type simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.06 07:44:35, skipping insertion in model container [2021-06-01 19:44:35,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.06 07:44:35" (2/2) ... [2021-06-01 19:44:35,666 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-queue.wvr.bpl [2021-06-01 19:44:35,671 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-01 19:44:35,671 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-01 19:44:35,671 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-01 19:44:35,672 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-01 19:44:35,714 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-01 19:44:35,732 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-01 19:44:35,754 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-01 19:44:35,754 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-01 19:44:35,754 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-01 19:44:35,755 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-01 19:44:35,755 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-01 19:44:35,768 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-01 19:44:35,769 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-01 19:44:35,769 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-01 19:44:35,775 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-06-01 19:44:35,782 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:35,784 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:35,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-01 19:44:35,805 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:44:35,805 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:44:35,806 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:44:35,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:44:35,818 INFO L82 PathProgramCache]: Analyzing trace with hash -262068682, now seen corresponding path program 1 times [2021-06-01 19:44:35,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:44:35,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499539667] [2021-06-01 19:44:35,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:44:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:44:35,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:35,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:44:35,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499539667] [2021-06-01 19:44:35,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499539667] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 19:44:35,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 19:44:35,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-01 19:44:35,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406485787] [2021-06-01 19:44:35,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-01 19:44:35,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:44:35,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-01 19:44:35,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-01 19:44:35,949 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:35,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:44:35,963 INFO L93 Difference]: Finished difference Result 20 states and 34 transitions. [2021-06-01 19:44:35,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-01 19:44:35,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-06-01 19:44:35,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:44:35,970 INFO L225 Difference]: With dead ends: 20 [2021-06-01 19:44:35,971 INFO L226 Difference]: Without dead ends: 16 [2021-06-01 19:44:35,972 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-01 19:44:35,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-06-01 19:44:35,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-06-01 19:44:35,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:35,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 27 transitions. [2021-06-01 19:44:35,995 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 27 transitions. Word has length 9 [2021-06-01 19:44:35,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:44:35,995 INFO L482 AbstractCegarLoop]: Abstraction has 16 states and 27 transitions. [2021-06-01 19:44:35,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:35,995 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 27 transitions. [2021-06-01 19:44:35,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-01 19:44:35,996 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:44:35,996 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:44:35,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-01 19:44:35,996 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:44:35,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:44:35,997 INFO L82 PathProgramCache]: Analyzing trace with hash 488876151, now seen corresponding path program 1 times [2021-06-01 19:44:35,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:44:35,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573335645] [2021-06-01 19:44:35,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:44:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:44:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:36,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:44:36,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573335645] [2021-06-01 19:44:36,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573335645] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 19:44:36,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 19:44:36,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-01 19:44:36,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566837881] [2021-06-01 19:44:36,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-01 19:44:36,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:44:36,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-01 19:44:36,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-01 19:44:36,026 INFO L87 Difference]: Start difference. First operand 16 states and 27 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:36,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:44:36,031 INFO L93 Difference]: Finished difference Result 21 states and 34 transitions. [2021-06-01 19:44:36,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-01 19:44:36,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-01 19:44:36,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:44:36,032 INFO L225 Difference]: With dead ends: 21 [2021-06-01 19:44:36,032 INFO L226 Difference]: Without dead ends: 18 [2021-06-01 19:44:36,033 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-01 19:44:36,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-06-01 19:44:36,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-06-01 19:44:36,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:36,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 30 transitions. [2021-06-01 19:44:36,036 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 30 transitions. Word has length 10 [2021-06-01 19:44:36,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:44:36,036 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 30 transitions. [2021-06-01 19:44:36,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:36,037 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 30 transitions. [2021-06-01 19:44:36,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-01 19:44:36,037 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:44:36,037 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:44:36,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-01 19:44:36,038 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:44:36,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:44:36,038 INFO L82 PathProgramCache]: Analyzing trace with hash 426152002, now seen corresponding path program 1 times [2021-06-01 19:44:36,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:44:36,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763205808] [2021-06-01 19:44:36,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:44:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:44:36,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:36,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:44:36,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763205808] [2021-06-01 19:44:36,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763205808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:36,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156601939] [2021-06-01 19:44:36,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:44:36,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 19:44:36,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:44:36,232 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 11 treesize of output 7 [2021-06-01 19:44:36,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:44:36,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:44:36,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:44:36,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:44:36,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:36,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156601939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:36,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:44:36,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-01 19:44:36,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72417385] [2021-06-01 19:44:36,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-01 19:44:36,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:44:36,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-01 19:44:36,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-01 19:44:36,274 INFO L87 Difference]: Start difference. First operand 18 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:36,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:44:36,318 INFO L93 Difference]: Finished difference Result 25 states and 43 transitions. [2021-06-01 19:44:36,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-01 19:44:36,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-01 19:44:36,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:44:36,321 INFO L225 Difference]: With dead ends: 25 [2021-06-01 19:44:36,321 INFO L226 Difference]: Without dead ends: 21 [2021-06-01 19:44:36,321 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-01 19:44:36,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-06-01 19:44:36,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-06-01 19:44:36,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 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) [2021-06-01 19:44:36,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 36 transitions. [2021-06-01 19:44:36,331 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 36 transitions. Word has length 11 [2021-06-01 19:44:36,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:44:36,331 INFO L482 AbstractCegarLoop]: Abstraction has 21 states and 36 transitions. [2021-06-01 19:44:36,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:36,332 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 36 transitions. [2021-06-01 19:44:36,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-01 19:44:36,332 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:44:36,332 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:44:36,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-01 19:44:36,545 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:44:36,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:44:36,546 INFO L82 PathProgramCache]: Analyzing trace with hash 348880875, now seen corresponding path program 2 times [2021-06-01 19:44:36,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:44:36,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936336160] [2021-06-01 19:44:36,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:44:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:44:36,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:36,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:44:36,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936336160] [2021-06-01 19:44:36,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936336160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:36,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615670129] [2021-06-01 19:44:36,594 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 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 [2021-06-01 19:44:36,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 19:44:36,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:44:36,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-01 19:44:36,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:44:36,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:36,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615670129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:36,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:44:36,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-06-01 19:44:36,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359776465] [2021-06-01 19:44:36,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-01 19:44:36,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:44:36,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-01 19:44:36,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-01 19:44:36,712 INFO L87 Difference]: Start difference. First operand 21 states and 36 transitions. 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) [2021-06-01 19:44:36,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:44:36,727 INFO L93 Difference]: Finished difference Result 50 states and 82 transitions. [2021-06-01 19:44:36,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-01 19:44:36,729 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 12 [2021-06-01 19:44:36,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:44:36,732 INFO L225 Difference]: With dead ends: 50 [2021-06-01 19:44:36,732 INFO L226 Difference]: Without dead ends: 45 [2021-06-01 19:44:36,732 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-01 19:44:36,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-06-01 19:44:36,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2021-06-01 19:44:36,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 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) [2021-06-01 19:44:36,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-06-01 19:44:36,738 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-06-01 19:44:36,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:44:36,738 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-06-01 19:44:36,738 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) [2021-06-01 19:44:36,738 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-06-01 19:44:36,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-01 19:44:36,739 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:44:36,739 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:44:36,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:36,959 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:44:36,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:44:36,960 INFO L82 PathProgramCache]: Analyzing trace with hash 200515830, now seen corresponding path program 3 times [2021-06-01 19:44:36,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:44:36,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961130328] [2021-06-01 19:44:36,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:44:36,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:44:37,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:37,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:44:37,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961130328] [2021-06-01 19:44:37,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961130328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:37,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924957226] [2021-06-01 19:44:37,019 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:37,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-01 19:44:37,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:44:37,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-01 19:44:37,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:44:37,098 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 11 treesize of output 7 [2021-06-01 19:44:37,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:44:37,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:44:37,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:44:37,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:44:37,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:37,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924957226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:37,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:44:37,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-01 19:44:37,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707789038] [2021-06-01 19:44:37,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 19:44:37,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:44:37,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 19:44:37,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-01 19:44:37,111 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:37,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:44:37,184 INFO L93 Difference]: Finished difference Result 65 states and 115 transitions. [2021-06-01 19:44:37,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 19:44:37,185 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-01 19:44:37,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:44:37,186 INFO L225 Difference]: With dead ends: 65 [2021-06-01 19:44:37,186 INFO L226 Difference]: Without dead ends: 39 [2021-06-01 19:44:37,186 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-01 19:44:37,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-01 19:44:37,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2021-06-01 19:44:37,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 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) [2021-06-01 19:44:37,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-06-01 19:44:37,190 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 13 [2021-06-01 19:44:37,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:44:37,190 INFO L482 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-06-01 19:44:37,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:37,190 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-06-01 19:44:37,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-01 19:44:37,191 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:44:37,191 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:44:37,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:37,392 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:44:37,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:44:37,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1944094135, now seen corresponding path program 4 times [2021-06-01 19:44:37,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:44:37,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545948047] [2021-06-01 19:44:37,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:44:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:44:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:37,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:44:37,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545948047] [2021-06-01 19:44:37,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545948047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:37,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888896838] [2021-06-01 19:44:37,440 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:37,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 19:44:37,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:44:37,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-01 19:44:37,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:44:37,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:37,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888896838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:37,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:44:37,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-01 19:44:37,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141669258] [2021-06-01 19:44:37,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-01 19:44:37,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:44:37,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-01 19:44:37,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-01 19:44:37,552 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:37,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:44:37,567 INFO L93 Difference]: Finished difference Result 73 states and 125 transitions. [2021-06-01 19:44:37,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-01 19:44:37,569 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-01 19:44:37,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:44:37,570 INFO L225 Difference]: With dead ends: 73 [2021-06-01 19:44:37,570 INFO L226 Difference]: Without dead ends: 66 [2021-06-01 19:44:37,570 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-01 19:44:37,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-01 19:44:37,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2021-06-01 19:44:37,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:37,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 95 transitions. [2021-06-01 19:44:37,576 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 95 transitions. Word has length 14 [2021-06-01 19:44:37,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:44:37,577 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 95 transitions. [2021-06-01 19:44:37,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:37,577 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 95 transitions. [2021-06-01 19:44:37,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-01 19:44:37,577 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:44:37,578 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:44:37,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:37,793 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:44:37,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:44:37,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1099206658, now seen corresponding path program 5 times [2021-06-01 19:44:37,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:44:37,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801691695] [2021-06-01 19:44:37,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:44:37,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:44:37,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:37,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:44:37,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801691695] [2021-06-01 19:44:37,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801691695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:37,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147430128] [2021-06-01 19:44:37,892 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:37,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 19:44:37,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:44:37,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-01 19:44:37,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:44:38,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-01 19:44:38,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-01 19:44:38,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:44:38,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:44:38,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:44:38,202 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-01 19:44:38,209 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:38,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147430128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:38,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:44:38,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-01 19:44:38,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239410463] [2021-06-01 19:44:38,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 19:44:38,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:44:38,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 19:44:38,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-01 19:44:38,212 INFO L87 Difference]: Start difference. First operand 48 states and 95 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:38,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:44:38,621 INFO L93 Difference]: Finished difference Result 229 states and 428 transitions. [2021-06-01 19:44:38,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-01 19:44:38,622 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-01 19:44:38,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:44:38,623 INFO L225 Difference]: With dead ends: 229 [2021-06-01 19:44:38,623 INFO L226 Difference]: Without dead ends: 116 [2021-06-01 19:44:38,624 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 410.3ms TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2021-06-01 19:44:38,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-01 19:44:38,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 56. [2021-06-01 19:44:38,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 55 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:38,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 113 transitions. [2021-06-01 19:44:38,630 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 113 transitions. Word has length 15 [2021-06-01 19:44:38,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:44:38,631 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 113 transitions. [2021-06-01 19:44:38,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:38,631 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 113 transitions. [2021-06-01 19:44:38,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 19:44:38,632 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:44:38,632 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:44:38,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-01 19:44:38,845 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:44:38,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:44:38,845 INFO L82 PathProgramCache]: Analyzing trace with hash -449307722, now seen corresponding path program 6 times [2021-06-01 19:44:38,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:44:38,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267097109] [2021-06-01 19:44:38,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:44:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:44:38,973 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:38,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:44:38,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267097109] [2021-06-01 19:44:38,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267097109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:38,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009317861] [2021-06-01 19:44:38,978 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:39,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 19:44:39,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:44:39,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-01 19:44:39,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:44:39,070 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 11 treesize of output 7 [2021-06-01 19:44:39,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:44:39,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:44:39,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:44:39,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:44:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:39,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009317861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:39,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:44:39,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-01 19:44:39,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228785752] [2021-06-01 19:44:39,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 19:44:39,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:44:39,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 19:44:39,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-01 19:44:39,088 INFO L87 Difference]: Start difference. First operand 56 states and 113 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:39,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:44:39,240 INFO L93 Difference]: Finished difference Result 121 states and 226 transitions. [2021-06-01 19:44:39,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 19:44:39,241 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-01 19:44:39,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:44:39,242 INFO L225 Difference]: With dead ends: 121 [2021-06-01 19:44:39,242 INFO L226 Difference]: Without dead ends: 77 [2021-06-01 19:44:39,242 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 188.6ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-01 19:44:39,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-06-01 19:44:39,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 36. [2021-06-01 19:44:39,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:39,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 66 transitions. [2021-06-01 19:44:39,246 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 66 transitions. Word has length 17 [2021-06-01 19:44:39,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:44:39,246 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 66 transitions. [2021-06-01 19:44:39,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:39,246 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 66 transitions. [2021-06-01 19:44:39,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 19:44:39,247 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:44:39,247 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:44:39,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:39,456 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:44:39,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:44:39,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1020566793, now seen corresponding path program 7 times [2021-06-01 19:44:39,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:44:39,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690186173] [2021-06-01 19:44:39,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:44:39,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:44:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:39,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:44:39,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690186173] [2021-06-01 19:44:39,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690186173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:39,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664013782] [2021-06-01 19:44:39,534 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:39,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:44:39,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-01 19:44:39,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:44:39,641 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:39,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664013782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:39,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:44:39,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-01 19:44:39,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318427374] [2021-06-01 19:44:39,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 19:44:39,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:44:39,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 19:44:39,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-01 19:44:39,643 INFO L87 Difference]: Start difference. First operand 36 states and 66 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:39,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:44:39,666 INFO L93 Difference]: Finished difference Result 128 states and 229 transitions. [2021-06-01 19:44:39,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-01 19:44:39,667 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-01 19:44:39,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:44:39,667 INFO L225 Difference]: With dead ends: 128 [2021-06-01 19:44:39,667 INFO L226 Difference]: Without dead ends: 117 [2021-06-01 19:44:39,668 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-01 19:44:39,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-01 19:44:39,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2021-06-01 19:44:39,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 86 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:39,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 179 transitions. [2021-06-01 19:44:39,686 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 179 transitions. Word has length 18 [2021-06-01 19:44:39,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:44:39,686 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 179 transitions. [2021-06-01 19:44:39,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:39,686 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 179 transitions. [2021-06-01 19:44:39,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 19:44:39,687 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:44:39,687 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:44:39,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:39,888 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:44:39,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:44:39,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1344581694, now seen corresponding path program 8 times [2021-06-01 19:44:39,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:44:39,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82340096] [2021-06-01 19:44:39,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:44:39,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:44:40,026 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:40,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:44:40,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82340096] [2021-06-01 19:44:40,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82340096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:40,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232978460] [2021-06-01 19:44:40,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:40,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 19:44:40,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:44:40,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-01 19:44:40,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:44:40,121 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 11 treesize of output 7 [2021-06-01 19:44:40,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:44:40,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:44:40,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:44:40,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:44:40,131 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:40,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232978460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:40,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:44:40,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-01 19:44:40,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248867075] [2021-06-01 19:44:40,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 19:44:40,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:44:40,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 19:44:40,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-06-01 19:44:40,133 INFO L87 Difference]: Start difference. First operand 87 states and 179 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:40,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:44:40,372 INFO L93 Difference]: Finished difference Result 179 states and 337 transitions. [2021-06-01 19:44:40,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-01 19:44:40,373 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-01 19:44:40,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:44:40,374 INFO L225 Difference]: With dead ends: 179 [2021-06-01 19:44:40,374 INFO L226 Difference]: Without dead ends: 105 [2021-06-01 19:44:40,374 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 253.4ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-01 19:44:40,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-01 19:44:40,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 41. [2021-06-01 19:44:40,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:40,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2021-06-01 19:44:40,377 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 19 [2021-06-01 19:44:40,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:44:40,377 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2021-06-01 19:44:40,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:40,377 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2021-06-01 19:44:40,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 19:44:40,378 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:44:40,378 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:44:40,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-01 19:44:40,600 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:44:40,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:44:40,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1290711147, now seen corresponding path program 9 times [2021-06-01 19:44:40,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:44:40,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326909572] [2021-06-01 19:44:40,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:44:40,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:44:40,664 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:40,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:44:40,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326909572] [2021-06-01 19:44:40,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326909572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:40,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127137198] [2021-06-01 19:44:40,665 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:40,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-01 19:44:40,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:44:40,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-01 19:44:40,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:44:40,760 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:40,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127137198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:40,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:44:40,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-01 19:44:40,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213086496] [2021-06-01 19:44:40,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-01 19:44:40,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:44:40,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-01 19:44:40,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-01 19:44:40,762 INFO L87 Difference]: Start difference. First operand 41 states and 76 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:40,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:44:40,779 INFO L93 Difference]: Finished difference Result 160 states and 290 transitions. [2021-06-01 19:44:40,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-01 19:44:40,779 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-01 19:44:40,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:44:40,780 INFO L225 Difference]: With dead ends: 160 [2021-06-01 19:44:40,780 INFO L226 Difference]: Without dead ends: 147 [2021-06-01 19:44:40,780 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-01 19:44:40,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-01 19:44:40,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 111. [2021-06-01 19:44:40,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.090909090909091) internal successors, (230), 110 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:40,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-06-01 19:44:40,785 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 20 [2021-06-01 19:44:40,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:44:40,785 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-06-01 19:44:40,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:40,785 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-06-01 19:44:40,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-01 19:44:40,786 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:44:40,786 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:44:41,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:41,009 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:44:41,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:44:41,009 INFO L82 PathProgramCache]: Analyzing trace with hash -849963402, now seen corresponding path program 10 times [2021-06-01 19:44:41,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:44:41,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648206728] [2021-06-01 19:44:41,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:44:41,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:44:41,164 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:41,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:44:41,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648206728] [2021-06-01 19:44:41,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648206728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:41,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422264777] [2021-06-01 19:44:41,165 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:41,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 19:44:41,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:44:41,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-01 19:44:41,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:44:41,258 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 11 treesize of output 7 [2021-06-01 19:44:41,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:44:41,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:44:41,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:44:41,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:44:41,269 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:41,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422264777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:41,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:44:41,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-01 19:44:41,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790256121] [2021-06-01 19:44:41,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 19:44:41,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:44:41,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 19:44:41,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-06-01 19:44:41,271 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 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) [2021-06-01 19:44:41,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:44:41,586 INFO L93 Difference]: Finished difference Result 229 states and 435 transitions. [2021-06-01 19:44:41,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 19:44:41,586 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 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 [2021-06-01 19:44:41,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:44:41,587 INFO L225 Difference]: With dead ends: 229 [2021-06-01 19:44:41,587 INFO L226 Difference]: Without dead ends: 135 [2021-06-01 19:44:41,588 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 326.7ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-06-01 19:44:41,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-01 19:44:41,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 46. [2021-06-01 19:44:41,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:41,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 86 transitions. [2021-06-01 19:44:41,591 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 86 transitions. Word has length 21 [2021-06-01 19:44:41,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:44:41,591 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 86 transitions. [2021-06-01 19:44:41,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 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) [2021-06-01 19:44:41,591 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 86 transitions. [2021-06-01 19:44:41,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-01 19:44:41,592 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:44:41,592 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:44:41,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:41,815 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:44:41,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:44:41,816 INFO L82 PathProgramCache]: Analyzing trace with hash -555990985, now seen corresponding path program 11 times [2021-06-01 19:44:41,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:44:41,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073477235] [2021-06-01 19:44:41,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:44:41,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:44:41,900 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:41,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:44:41,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073477235] [2021-06-01 19:44:41,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073477235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:41,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2215621] [2021-06-01 19:44:41,901 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:41,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-01 19:44:41,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:44:41,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-01 19:44:41,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:44:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:41,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2215621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:41,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:44:41,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-01 19:44:41,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884828138] [2021-06-01 19:44:41,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-01 19:44:42,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:44:42,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-01 19:44:42,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-06-01 19:44:42,000 INFO L87 Difference]: Start difference. First operand 46 states and 86 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:42,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:44:42,020 INFO L93 Difference]: Finished difference Result 195 states and 357 transitions. [2021-06-01 19:44:42,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 19:44:42,021 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-01 19:44:42,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:44:42,022 INFO L225 Difference]: With dead ends: 195 [2021-06-01 19:44:42,022 INFO L226 Difference]: Without dead ends: 180 [2021-06-01 19:44:42,022 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-06-01 19:44:42,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-01 19:44:42,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 138. [2021-06-01 19:44:42,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0948905109489053) internal successors, (287), 137 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:42,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 287 transitions. [2021-06-01 19:44:42,026 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 287 transitions. Word has length 22 [2021-06-01 19:44:42,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:44:42,027 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 287 transitions. [2021-06-01 19:44:42,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:42,027 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 287 transitions. [2021-06-01 19:44:42,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-01 19:44:42,028 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:44:42,028 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:44:42,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-01 19:44:42,250 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:44:42,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:44:42,251 INFO L82 PathProgramCache]: Analyzing trace with hash -454897790, now seen corresponding path program 12 times [2021-06-01 19:44:42,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:44:42,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153882757] [2021-06-01 19:44:42,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:44:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:44:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:42,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:44:42,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153882757] [2021-06-01 19:44:42,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153882757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:42,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111643716] [2021-06-01 19:44:42,445 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:42,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-01 19:44:42,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:44:42,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 19:44:42,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:44:42,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-01 19:44:42,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-01 19:44:42,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:44:42,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:44:42,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:44:42,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-01 19:44:43,006 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:43,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111643716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:43,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:44:43,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-01 19:44:43,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243316582] [2021-06-01 19:44:43,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-01 19:44:43,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:44:43,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-01 19:44:43,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2021-06-01 19:44:43,009 INFO L87 Difference]: Start difference. First operand 138 states and 287 transitions. Second operand has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 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) [2021-06-01 19:44:44,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:44:44,643 INFO L93 Difference]: Finished difference Result 869 states and 1674 transitions. [2021-06-01 19:44:44,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-01 19:44:44,643 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 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 23 [2021-06-01 19:44:44,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:44:44,646 INFO L225 Difference]: With dead ends: 869 [2021-06-01 19:44:44,646 INFO L226 Difference]: Without dead ends: 472 [2021-06-01 19:44:44,648 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 1761.9ms TimeCoverageRelationStatistics Valid=1224, Invalid=5256, Unknown=0, NotChecked=0, Total=6480 [2021-06-01 19:44:44,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-01 19:44:44,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 150. [2021-06-01 19:44:44,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1006711409395975) internal successors, (313), 149 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:44,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 313 transitions. [2021-06-01 19:44:44,656 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 313 transitions. Word has length 23 [2021-06-01 19:44:44,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:44:44,657 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 313 transitions. [2021-06-01 19:44:44,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 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) [2021-06-01 19:44:44,657 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 313 transitions. [2021-06-01 19:44:44,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 19:44:44,659 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:44:44,659 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:44:44,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-01 19:44:44,882 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:44:44,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:44:44,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1467420982, now seen corresponding path program 13 times [2021-06-01 19:44:44,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:44:44,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145432339] [2021-06-01 19:44:44,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:44:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:44:45,137 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:45,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:44:45,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145432339] [2021-06-01 19:44:45,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145432339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:45,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312387390] [2021-06-01 19:44:45,137 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:45,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:44:45,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-01 19:44:45,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:44:45,236 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 11 treesize of output 7 [2021-06-01 19:44:45,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:44:45,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:44:45,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:44:45,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:44:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:45,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312387390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:45,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:44:45,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-01 19:44:45,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332370446] [2021-06-01 19:44:45,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-01 19:44:45,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:44:45,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-01 19:44:45,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-06-01 19:44:45,248 INFO L87 Difference]: Start difference. First operand 150 states and 313 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:45,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:44:45,687 INFO L93 Difference]: Finished difference Result 325 states and 626 transitions. [2021-06-01 19:44:45,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-01 19:44:45,688 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-01 19:44:45,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:44:45,689 INFO L225 Difference]: With dead ends: 325 [2021-06-01 19:44:45,689 INFO L226 Difference]: Without dead ends: 205 [2021-06-01 19:44:45,689 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 489.9ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-06-01 19:44:45,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-01 19:44:45,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 56. [2021-06-01 19:44:45,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.9272727272727272) internal successors, (106), 55 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:45,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 106 transitions. [2021-06-01 19:44:45,692 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 106 transitions. Word has length 25 [2021-06-01 19:44:45,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:44:45,692 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 106 transitions. [2021-06-01 19:44:45,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:45,692 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 106 transitions. [2021-06-01 19:44:45,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-01 19:44:45,693 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:44:45,693 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:44:45,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-01 19:44:45,909 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:44:45,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:44:45,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1731519113, now seen corresponding path program 14 times [2021-06-01 19:44:45,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:44:45,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504922868] [2021-06-01 19:44:45,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:44:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:44:45,990 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:45,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:44:45,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504922868] [2021-06-01 19:44:45,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504922868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:45,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772937736] [2021-06-01 19:44:45,990 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:46,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 19:44:46,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:44:46,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-01 19:44:46,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:44:46,081 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:46,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772937736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:46,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:44:46,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-01 19:44:46,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085464386] [2021-06-01 19:44:46,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 19:44:46,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:44:46,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 19:44:46,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-06-01 19:44:46,082 INFO L87 Difference]: Start difference. First operand 56 states and 106 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:46,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:44:46,106 INFO L93 Difference]: Finished difference Result 274 states and 509 transitions. [2021-06-01 19:44:46,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 19:44:46,107 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-01 19:44:46,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:44:46,108 INFO L225 Difference]: With dead ends: 274 [2021-06-01 19:44:46,108 INFO L226 Difference]: Without dead ends: 255 [2021-06-01 19:44:46,108 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-06-01 19:44:46,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-01 19:44:46,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 201. [2021-06-01 19:44:46,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.095) internal successors, (419), 200 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:46,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 419 transitions. [2021-06-01 19:44:46,113 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 419 transitions. Word has length 26 [2021-06-01 19:44:46,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:44:46,113 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 419 transitions. [2021-06-01 19:44:46,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:46,114 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 419 transitions. [2021-06-01 19:44:46,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-01 19:44:46,114 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:44:46,114 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:44:46,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:46,337 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:44:46,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:44:46,337 INFO L82 PathProgramCache]: Analyzing trace with hash 252907330, now seen corresponding path program 15 times [2021-06-01 19:44:46,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:44:46,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305522536] [2021-06-01 19:44:46,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:44:46,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:44:46,625 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:46,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:44:46,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305522536] [2021-06-01 19:44:46,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305522536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:46,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458318817] [2021-06-01 19:44:46,626 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:46,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-01 19:44:46,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:44:46,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-01 19:44:46,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:44:46,742 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 11 treesize of output 7 [2021-06-01 19:44:46,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:44:46,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:44:46,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:44:46,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:44:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:46,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458318817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:46,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:44:46,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-06-01 19:44:46,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198168124] [2021-06-01 19:44:46,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-01 19:44:46,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:44:46,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-01 19:44:46,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-06-01 19:44:46,754 INFO L87 Difference]: Start difference. First operand 201 states and 419 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:47,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:44:47,303 INFO L93 Difference]: Finished difference Result 415 states and 801 transitions. [2021-06-01 19:44:47,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-01 19:44:47,303 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-01 19:44:47,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:44:47,304 INFO L225 Difference]: With dead ends: 415 [2021-06-01 19:44:47,304 INFO L226 Difference]: Without dead ends: 249 [2021-06-01 19:44:47,305 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 621.3ms TimeCoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2021-06-01 19:44:47,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-01 19:44:47,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 61. [2021-06-01 19:44:47,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 60 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:47,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2021-06-01 19:44:47,308 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 27 [2021-06-01 19:44:47,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:44:47,308 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2021-06-01 19:44:47,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:47,308 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2021-06-01 19:44:47,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-01 19:44:47,309 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:44:47,309 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:44:47,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-01 19:44:47,525 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:44:47,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:44:47,525 INFO L82 PathProgramCache]: Analyzing trace with hash -726736661, now seen corresponding path program 16 times [2021-06-01 19:44:47,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:44:47,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10298324] [2021-06-01 19:44:47,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:44:47,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:44:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:47,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:44:47,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10298324] [2021-06-01 19:44:47,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10298324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:47,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410203488] [2021-06-01 19:44:47,609 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:47,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 19:44:47,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:44:47,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 19:44:47,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:44:47,705 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:47,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410203488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:47,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:44:47,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-01 19:44:47,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550260943] [2021-06-01 19:44:47,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-01 19:44:47,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:44:47,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-01 19:44:47,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-06-01 19:44:47,706 INFO L87 Difference]: Start difference. First operand 61 states and 116 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:47,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:44:47,734 INFO L93 Difference]: Finished difference Result 318 states and 594 transitions. [2021-06-01 19:44:47,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 19:44:47,735 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 28 [2021-06-01 19:44:47,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:44:47,736 INFO L225 Difference]: With dead ends: 318 [2021-06-01 19:44:47,736 INFO L226 Difference]: Without dead ends: 297 [2021-06-01 19:44:47,736 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-06-01 19:44:47,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-06-01 19:44:47,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 237. [2021-06-01 19:44:47,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.093220338983051) internal successors, (494), 236 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:47,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 494 transitions. [2021-06-01 19:44:47,742 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 494 transitions. Word has length 28 [2021-06-01 19:44:47,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:44:47,742 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 494 transitions. [2021-06-01 19:44:47,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:47,742 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 494 transitions. [2021-06-01 19:44:47,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-01 19:44:47,743 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:44:47,743 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:44:47,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-01 19:44:47,966 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:44:47,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:44:47,966 INFO L82 PathProgramCache]: Analyzing trace with hash -658404362, now seen corresponding path program 17 times [2021-06-01 19:44:47,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:44:47,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689478175] [2021-06-01 19:44:47,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:44:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:44:48,271 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:48,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:44:48,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689478175] [2021-06-01 19:44:48,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689478175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:48,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791624792] [2021-06-01 19:44:48,272 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:48,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-01 19:44:48,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:44:48,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-01 19:44:48,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:44:49,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-01 19:44:49,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-01 19:44:49,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:44:49,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:44:49,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:44:49,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-01 19:44:49,142 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 45 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:49,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791624792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:49,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:44:49,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-01 19:44:49,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585532622] [2021-06-01 19:44:49,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-01 19:44:49,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:44:49,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-01 19:44:49,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1533, Unknown=0, NotChecked=0, Total=1806 [2021-06-01 19:44:49,143 INFO L87 Difference]: Start difference. First operand 237 states and 494 transitions. Second operand has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 42 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) [2021-06-01 19:44:52,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:44:52,798 INFO L93 Difference]: Finished difference Result 1727 states and 3354 transitions. [2021-06-01 19:44:52,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-01 19:44:52,798 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 42 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 29 [2021-06-01 19:44:52,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:44:52,802 INFO L225 Difference]: With dead ends: 1727 [2021-06-01 19:44:52,802 INFO L226 Difference]: Without dead ends: 1012 [2021-06-01 19:44:52,806 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4325 ImplicationChecksByTransitivity, 3884.2ms TimeCoverageRelationStatistics Valid=2986, Invalid=13526, Unknown=0, NotChecked=0, Total=16512 [2021-06-01 19:44:52,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2021-06-01 19:44:52,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 252. [2021-06-01 19:44:52,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.095617529880478) internal successors, (526), 251 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:52,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 526 transitions. [2021-06-01 19:44:52,815 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 526 transitions. Word has length 29 [2021-06-01 19:44:52,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:44:52,815 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 526 transitions. [2021-06-01 19:44:52,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 42 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) [2021-06-01 19:44:52,816 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 526 transitions. [2021-06-01 19:44:52,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-01 19:44:52,816 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:44:52,816 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:44:53,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:53,033 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:44:53,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:44:53,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1964765438, now seen corresponding path program 18 times [2021-06-01 19:44:53,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:44:53,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259950121] [2021-06-01 19:44:53,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:44:53,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:44:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:53,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:44:53,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259950121] [2021-06-01 19:44:53,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259950121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:53,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251897346] [2021-06-01 19:44:53,355 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:53,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-01 19:44:53,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:44:53,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-01 19:44:53,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:44:53,475 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 11 treesize of output 7 [2021-06-01 19:44:53,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:44:53,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:44:53,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:44:53,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:44:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:53,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251897346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:53,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:44:53,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-01 19:44:53,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69358226] [2021-06-01 19:44:53,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-01 19:44:53,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:44:53,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-01 19:44:53,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-06-01 19:44:53,485 INFO L87 Difference]: Start difference. First operand 252 states and 526 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:54,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:44:54,192 INFO L93 Difference]: Finished difference Result 541 states and 1052 transitions. [2021-06-01 19:44:54,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-01 19:44:54,209 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-01 19:44:54,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:44:54,210 INFO L225 Difference]: With dead ends: 541 [2021-06-01 19:44:54,210 INFO L226 Difference]: Without dead ends: 343 [2021-06-01 19:44:54,211 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 768.2ms TimeCoverageRelationStatistics Valid=355, Invalid=1807, Unknown=0, NotChecked=0, Total=2162 [2021-06-01 19:44:54,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-06-01 19:44:54,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 71. [2021-06-01 19:44:54,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.9428571428571428) internal successors, (136), 70 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:54,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 136 transitions. [2021-06-01 19:44:54,215 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 136 transitions. Word has length 31 [2021-06-01 19:44:54,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:44:54,215 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 136 transitions. [2021-06-01 19:44:54,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:54,215 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 136 transitions. [2021-06-01 19:44:54,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-01 19:44:54,215 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:44:54,215 INFO L554 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:44:54,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:54,439 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:44:54,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:44:54,439 INFO L82 PathProgramCache]: Analyzing trace with hash -755115733, now seen corresponding path program 19 times [2021-06-01 19:44:54,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:44:54,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696559149] [2021-06-01 19:44:54,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:44:54,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:44:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:54,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:44:54,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696559149] [2021-06-01 19:44:54,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696559149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:54,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64802885] [2021-06-01 19:44:54,561 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:44:54,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-01 19:44:54,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:44:54,705 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:54,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64802885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:54,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:44:54,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-01 19:44:54,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290043377] [2021-06-01 19:44:54,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-01 19:44:54,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:44:54,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-01 19:44:54,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-06-01 19:44:54,707 INFO L87 Difference]: Start difference. First operand 71 states and 136 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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) [2021-06-01 19:44:54,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:44:54,740 INFO L93 Difference]: Finished difference Result 415 states and 782 transitions. [2021-06-01 19:44:54,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-01 19:44:54,741 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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 32 [2021-06-01 19:44:54,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:44:54,742 INFO L225 Difference]: With dead ends: 415 [2021-06-01 19:44:54,742 INFO L226 Difference]: Without dead ends: 390 [2021-06-01 19:44:54,743 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-06-01 19:44:54,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-01 19:44:54,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 318. [2021-06-01 19:44:54,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.088328075709779) internal successors, (662), 317 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:54,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 662 transitions. [2021-06-01 19:44:54,751 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 662 transitions. Word has length 32 [2021-06-01 19:44:54,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:44:54,752 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 662 transitions. [2021-06-01 19:44:54,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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) [2021-06-01 19:44:54,752 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 662 transitions. [2021-06-01 19:44:54,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-01 19:44:54,753 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:44:54,753 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:44:54,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:54,973 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:44:54,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:44:54,973 INFO L82 PathProgramCache]: Analyzing trace with hash -396491082, now seen corresponding path program 20 times [2021-06-01 19:44:54,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:44:54,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620112008] [2021-06-01 19:44:54,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:44:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:44:55,316 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:55,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:44:55,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620112008] [2021-06-01 19:44:55,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620112008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:55,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488019057] [2021-06-01 19:44:55,317 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:55,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 19:44:55,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:44:55,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-01 19:44:55,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:44:55,437 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 11 treesize of output 7 [2021-06-01 19:44:55,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:44:55,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:44:55,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:44:55,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:44:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:55,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488019057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:55,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:44:55,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-01 19:44:55,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301707941] [2021-06-01 19:44:55,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-01 19:44:55,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:44:55,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-01 19:44:55,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-06-01 19:44:55,449 INFO L87 Difference]: Start difference. First operand 318 states and 662 transitions. Second operand has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 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) [2021-06-01 19:44:56,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:44:56,301 INFO L93 Difference]: Finished difference Result 655 states and 1275 transitions. [2021-06-01 19:44:56,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-01 19:44:56,301 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 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 33 [2021-06-01 19:44:56,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:44:56,302 INFO L225 Difference]: With dead ends: 655 [2021-06-01 19:44:56,302 INFO L226 Difference]: Without dead ends: 399 [2021-06-01 19:44:56,303 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 915.9ms TimeCoverageRelationStatistics Valid=411, Invalid=2139, Unknown=0, NotChecked=0, Total=2550 [2021-06-01 19:44:56,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-01 19:44:56,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 76. [2021-06-01 19:44:56,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 75 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:56,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 146 transitions. [2021-06-01 19:44:56,307 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 146 transitions. Word has length 33 [2021-06-01 19:44:56,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:44:56,307 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 146 transitions. [2021-06-01 19:44:56,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 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) [2021-06-01 19:44:56,307 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 146 transitions. [2021-06-01 19:44:56,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-01 19:44:56,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:44:56,307 INFO L554 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:44:56,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-01 19:44:56,530 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:44:56,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:44:56,530 INFO L82 PathProgramCache]: Analyzing trace with hash 616749047, now seen corresponding path program 21 times [2021-06-01 19:44:56,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:44:56,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774014682] [2021-06-01 19:44:56,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:44:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:44:56,649 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:56,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:44:56,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774014682] [2021-06-01 19:44:56,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774014682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:56,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611788577] [2021-06-01 19:44:56,650 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 [2021-06-01 19:44:56,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-01 19:44:56,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:44:56,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-01 19:44:56,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:44:56,769 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:56,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611788577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:56,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:44:56,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-01 19:44:56,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708717709] [2021-06-01 19:44:56,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 19:44:56,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:44:56,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 19:44:56,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-06-01 19:44:56,771 INFO L87 Difference]: Start difference. First operand 76 states and 146 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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) [2021-06-01 19:44:56,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:44:56,807 INFO L93 Difference]: Finished difference Result 468 states and 885 transitions. [2021-06-01 19:44:56,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-01 19:44:56,808 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 34 [2021-06-01 19:44:56,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:44:56,809 INFO L225 Difference]: With dead ends: 468 [2021-06-01 19:44:56,809 INFO L226 Difference]: Without dead ends: 441 [2021-06-01 19:44:56,810 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-06-01 19:44:56,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-06-01 19:44:56,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 363. [2021-06-01 19:44:56,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.085635359116022) internal successors, (755), 362 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:56,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 755 transitions. [2021-06-01 19:44:56,817 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 755 transitions. Word has length 34 [2021-06-01 19:44:56,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:44:56,817 INFO L482 AbstractCegarLoop]: Abstraction has 363 states and 755 transitions. [2021-06-01 19:44:56,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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) [2021-06-01 19:44:56,817 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 755 transitions. [2021-06-01 19:44:56,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 19:44:56,818 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:44:56,818 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:44:57,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-01 19:44:57,041 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:44:57,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:44:57,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1657654978, now seen corresponding path program 22 times [2021-06-01 19:44:57,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:44:57,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193310491] [2021-06-01 19:44:57,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:44:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:44:57,550 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:57,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:44:57,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193310491] [2021-06-01 19:44:57,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193310491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:57,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262485526] [2021-06-01 19:44:57,550 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:57,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 19:44:57,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:44:57,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-01 19:44:57,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:44:57,653 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 11 treesize of output 7 [2021-06-01 19:44:57,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:44:57,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:44:57,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:44:57,657 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:44:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:57,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262485526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:57,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:44:57,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2021-06-01 19:44:57,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730648862] [2021-06-01 19:44:57,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-01 19:44:57,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:44:57,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-01 19:44:57,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2021-06-01 19:44:57,665 INFO L87 Difference]: Start difference. First operand 363 states and 755 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 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) [2021-06-01 19:44:58,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:44:58,675 INFO L93 Difference]: Finished difference Result 747 states and 1457 transitions. [2021-06-01 19:44:58,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-01 19:44:58,676 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 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 35 [2021-06-01 19:44:58,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:44:58,677 INFO L225 Difference]: With dead ends: 747 [2021-06-01 19:44:58,677 INFO L226 Difference]: Without dead ends: 457 [2021-06-01 19:44:58,677 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1204.1ms TimeCoverageRelationStatistics Valid=471, Invalid=2499, Unknown=0, NotChecked=0, Total=2970 [2021-06-01 19:44:58,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-01 19:44:58,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 81. [2021-06-01 19:44:58,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.95) internal successors, (156), 80 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:58,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 156 transitions. [2021-06-01 19:44:58,681 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 156 transitions. Word has length 35 [2021-06-01 19:44:58,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:44:58,681 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 156 transitions. [2021-06-01 19:44:58,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 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) [2021-06-01 19:44:58,681 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 156 transitions. [2021-06-01 19:44:58,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-01 19:44:58,682 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:44:58,682 INFO L554 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:44:58,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:58,897 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:44:58,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:44:58,897 INFO L82 PathProgramCache]: Analyzing trace with hash -129232533, now seen corresponding path program 23 times [2021-06-01 19:44:58,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:44:58,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523368413] [2021-06-01 19:44:58,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:44:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:44:59,022 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:59,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:44:59,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523368413] [2021-06-01 19:44:59,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523368413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:59,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543685339] [2021-06-01 19:44:59,023 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:59,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-01 19:44:59,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:44:59,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-01 19:44:59,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:44:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:59,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543685339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:59,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:44:59,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-01 19:44:59,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054113719] [2021-06-01 19:44:59,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 19:44:59,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:44:59,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 19:44:59,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-06-01 19:44:59,153 INFO L87 Difference]: Start difference. First operand 81 states and 156 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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) [2021-06-01 19:44:59,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:44:59,187 INFO L93 Difference]: Finished difference Result 524 states and 994 transitions. [2021-06-01 19:44:59,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 19:44:59,188 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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 36 [2021-06-01 19:44:59,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:44:59,189 INFO L225 Difference]: With dead ends: 524 [2021-06-01 19:44:59,189 INFO L226 Difference]: Without dead ends: 495 [2021-06-01 19:44:59,189 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-06-01 19:44:59,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-01 19:44:59,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 411. [2021-06-01 19:44:59,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0829268292682928) internal successors, (854), 410 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:44:59,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 854 transitions. [2021-06-01 19:44:59,196 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 854 transitions. Word has length 36 [2021-06-01 19:44:59,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:44:59,196 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 854 transitions. [2021-06-01 19:44:59,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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) [2021-06-01 19:44:59,197 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 854 transitions. [2021-06-01 19:44:59,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 19:44:59,197 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:44:59,197 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:44:59,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-01 19:44:59,420 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:44:59,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:44:59,420 INFO L82 PathProgramCache]: Analyzing trace with hash -546012810, now seen corresponding path program 24 times [2021-06-01 19:44:59,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:44:59,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730938687] [2021-06-01 19:44:59,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:44:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:44:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:44:59,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:44:59,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730938687] [2021-06-01 19:44:59,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730938687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:44:59,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824986494] [2021-06-01 19:44:59,944 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:44:59,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-01 19:44:59,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:44:59,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-01 19:44:59,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:45:00,053 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 11 treesize of output 7 [2021-06-01 19:45:00,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:45:00,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:45:00,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:45:00,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:45:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:45:00,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824986494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:45:00,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:45:00,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-01 19:45:00,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507561993] [2021-06-01 19:45:00,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-01 19:45:00,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:45:00,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-01 19:45:00,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2021-06-01 19:45:00,062 INFO L87 Difference]: Start difference. First operand 411 states and 854 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 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) [2021-06-01 19:45:01,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:45:01,300 INFO L93 Difference]: Finished difference Result 845 states and 1651 transitions. [2021-06-01 19:45:01,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-01 19:45:01,301 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 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 37 [2021-06-01 19:45:01,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:45:01,303 INFO L225 Difference]: With dead ends: 845 [2021-06-01 19:45:01,303 INFO L226 Difference]: Without dead ends: 519 [2021-06-01 19:45:01,303 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1390.9ms TimeCoverageRelationStatistics Valid=535, Invalid=2887, Unknown=0, NotChecked=0, Total=3422 [2021-06-01 19:45:01,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-01 19:45:01,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 86. [2021-06-01 19:45:01,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.9529411764705882) internal successors, (166), 85 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:45:01,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 166 transitions. [2021-06-01 19:45:01,307 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 166 transitions. Word has length 37 [2021-06-01 19:45:01,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:45:01,307 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 166 transitions. [2021-06-01 19:45:01,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 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) [2021-06-01 19:45:01,307 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 166 transitions. [2021-06-01 19:45:01,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-01 19:45:01,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:45:01,307 INFO L554 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:45:01,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:45:01,521 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:45:01,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:45:01,521 INFO L82 PathProgramCache]: Analyzing trace with hash 276542775, now seen corresponding path program 25 times [2021-06-01 19:45:01,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:45:01,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524184748] [2021-06-01 19:45:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:45:01,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:45:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:45:01,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:45:01,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524184748] [2021-06-01 19:45:01,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524184748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:45:01,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533314234] [2021-06-01 19:45:01,671 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:45:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:45:01,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-01 19:45:01,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:45:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:45:01,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533314234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:45:01,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:45:01,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-01 19:45:01,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536860033] [2021-06-01 19:45:01,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-01 19:45:01,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:45:01,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-01 19:45:01,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-06-01 19:45:01,785 INFO L87 Difference]: Start difference. First operand 86 states and 166 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:45:01,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:45:01,822 INFO L93 Difference]: Finished difference Result 583 states and 1109 transitions. [2021-06-01 19:45:01,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-01 19:45:01,822 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-01 19:45:01,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:45:01,823 INFO L225 Difference]: With dead ends: 583 [2021-06-01 19:45:01,823 INFO L226 Difference]: Without dead ends: 552 [2021-06-01 19:45:01,824 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-06-01 19:45:01,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-06-01 19:45:01,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 462. [2021-06-01 19:45:01,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.0802603036876355) internal successors, (959), 461 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:45:01,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 959 transitions. [2021-06-01 19:45:01,831 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 959 transitions. Word has length 38 [2021-06-01 19:45:01,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:45:01,831 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 959 transitions. [2021-06-01 19:45:01,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:45:01,831 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 959 transitions. [2021-06-01 19:45:01,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-01 19:45:01,832 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:45:01,832 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:45:02,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-01 19:45:02,056 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:45:02,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:45:02,057 INFO L82 PathProgramCache]: Analyzing trace with hash -817344894, now seen corresponding path program 26 times [2021-06-01 19:45:02,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:45:02,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611331516] [2021-06-01 19:45:02,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:45:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:45:02,589 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:45:02,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:45:02,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611331516] [2021-06-01 19:45:02,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611331516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:45:02,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322514204] [2021-06-01 19:45:02,589 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:45:02,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 19:45:02,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:45:02,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-01 19:45:02,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:45:02,727 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 11 treesize of output 7 [2021-06-01 19:45:02,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:45:02,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:45:02,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:45:02,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:45:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:45:02,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322514204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:45:02,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:45:02,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-01 19:45:02,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487315165] [2021-06-01 19:45:02,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 19:45:02,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:45:02,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 19:45:02,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 19:45:02,737 INFO L87 Difference]: Start difference. First operand 462 states and 959 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 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) [2021-06-01 19:45:04,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:45:04,041 INFO L93 Difference]: Finished difference Result 949 states and 1857 transitions. [2021-06-01 19:45:04,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-01 19:45:04,041 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 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 39 [2021-06-01 19:45:04,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:45:04,042 INFO L225 Difference]: With dead ends: 949 [2021-06-01 19:45:04,042 INFO L226 Difference]: Without dead ends: 585 [2021-06-01 19:45:04,043 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1419.1ms TimeCoverageRelationStatistics Valid=603, Invalid=3303, Unknown=0, NotChecked=0, Total=3906 [2021-06-01 19:45:04,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-01 19:45:04,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 91. [2021-06-01 19:45:04,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.9555555555555555) internal successors, (176), 90 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:45:04,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 176 transitions. [2021-06-01 19:45:04,046 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 176 transitions. Word has length 39 [2021-06-01 19:45:04,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:45:04,046 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 176 transitions. [2021-06-01 19:45:04,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 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) [2021-06-01 19:45:04,047 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 176 transitions. [2021-06-01 19:45:04,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-01 19:45:04,047 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:45:04,047 INFO L554 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:45:04,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-01 19:45:04,261 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:45:04,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:45:04,261 INFO L82 PathProgramCache]: Analyzing trace with hash 455182763, now seen corresponding path program 27 times [2021-06-01 19:45:04,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:45:04,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728705359] [2021-06-01 19:45:04,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:45:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:45:04,432 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:45:04,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:45:04,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728705359] [2021-06-01 19:45:04,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728705359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:45:04,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629700108] [2021-06-01 19:45:04,432 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:45:04,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-01 19:45:04,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:45:04,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 19:45:04,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:45:04,595 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:45:04,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629700108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:45:04,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:45:04,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-06-01 19:45:04,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129584899] [2021-06-01 19:45:04,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-01 19:45:04,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:45:04,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-01 19:45:04,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-06-01 19:45:04,596 INFO L87 Difference]: Start difference. First operand 91 states and 176 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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) [2021-06-01 19:45:04,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:45:04,643 INFO L93 Difference]: Finished difference Result 645 states and 1230 transitions. [2021-06-01 19:45:04,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-01 19:45:04,644 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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 40 [2021-06-01 19:45:04,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:45:04,645 INFO L225 Difference]: With dead ends: 645 [2021-06-01 19:45:04,645 INFO L226 Difference]: Without dead ends: 612 [2021-06-01 19:45:04,647 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 123.0ms TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-06-01 19:45:04,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-01 19:45:04,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 516. [2021-06-01 19:45:04,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 2.0776699029126213) internal successors, (1070), 515 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:45:04,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1070 transitions. [2021-06-01 19:45:04,654 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1070 transitions. Word has length 40 [2021-06-01 19:45:04,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:45:04,655 INFO L482 AbstractCegarLoop]: Abstraction has 516 states and 1070 transitions. [2021-06-01 19:45:04,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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) [2021-06-01 19:45:04,655 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1070 transitions. [2021-06-01 19:45:04,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-01 19:45:04,655 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:45:04,656 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:45:04,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-01 19:45:04,869 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:45:04,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:45:04,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1496120374, now seen corresponding path program 28 times [2021-06-01 19:45:04,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:45:04,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956610539] [2021-06-01 19:45:04,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:45:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:45:05,438 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:45:05,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:45:05,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956610539] [2021-06-01 19:45:05,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956610539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:45:05,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817288536] [2021-06-01 19:45:05,438 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:45:05,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 19:45:05,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:45:05,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-01 19:45:05,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:45:05,565 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 11 treesize of output 7 [2021-06-01 19:45:05,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:45:05,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:45:05,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:45:05,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:45:05,572 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:45:05,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817288536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:45:05,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:45:05,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-01 19:45:05,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481075086] [2021-06-01 19:45:05,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-01 19:45:05,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:45:05,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-01 19:45:05,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2021-06-01 19:45:05,573 INFO L87 Difference]: Start difference. First operand 516 states and 1070 transitions. Second operand has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 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) [2021-06-01 19:45:07,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:45:07,016 INFO L93 Difference]: Finished difference Result 1059 states and 2075 transitions. [2021-06-01 19:45:07,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-01 19:45:07,016 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 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 41 [2021-06-01 19:45:07,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:45:07,018 INFO L225 Difference]: With dead ends: 1059 [2021-06-01 19:45:07,018 INFO L226 Difference]: Without dead ends: 655 [2021-06-01 19:45:07,019 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1581.5ms TimeCoverageRelationStatistics Valid=675, Invalid=3747, Unknown=0, NotChecked=0, Total=4422 [2021-06-01 19:45:07,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-06-01 19:45:07,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 96. [2021-06-01 19:45:07,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.9578947368421054) internal successors, (186), 95 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:45:07,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 186 transitions. [2021-06-01 19:45:07,023 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 186 transitions. Word has length 41 [2021-06-01 19:45:07,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:45:07,023 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 186 transitions. [2021-06-01 19:45:07,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 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) [2021-06-01 19:45:07,023 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 186 transitions. [2021-06-01 19:45:07,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-01 19:45:07,023 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:45:07,023 INFO L554 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:45:07,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:45:07,232 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:45:07,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:45:07,232 INFO L82 PathProgramCache]: Analyzing trace with hash -841837961, now seen corresponding path program 29 times [2021-06-01 19:45:07,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:45:07,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726887675] [2021-06-01 19:45:07,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:45:07,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:45:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:45:07,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:45:07,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726887675] [2021-06-01 19:45:07,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726887675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:45:07,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493433443] [2021-06-01 19:45:07,409 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 [2021-06-01 19:45:07,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-01 19:45:07,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:45:07,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-01 19:45:07,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:45:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:45:07,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493433443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:45:07,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:45:07,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 19 [2021-06-01 19:45:07,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389940141] [2021-06-01 19:45:07,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-01 19:45:07,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:45:07,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-01 19:45:07,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-06-01 19:45:07,573 INFO L87 Difference]: Start difference. First operand 96 states and 186 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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) [2021-06-01 19:45:07,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:45:07,615 INFO L93 Difference]: Finished difference Result 710 states and 1357 transitions. [2021-06-01 19:45:07,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-01 19:45:07,616 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 42 [2021-06-01 19:45:07,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:45:07,618 INFO L225 Difference]: With dead ends: 710 [2021-06-01 19:45:07,618 INFO L226 Difference]: Without dead ends: 675 [2021-06-01 19:45:07,618 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 143.8ms TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-06-01 19:45:07,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-06-01 19:45:07,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 573. [2021-06-01 19:45:07,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.075174825174825) internal successors, (1187), 572 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:45:07,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1187 transitions. [2021-06-01 19:45:07,628 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1187 transitions. Word has length 42 [2021-06-01 19:45:07,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:45:07,628 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1187 transitions. [2021-06-01 19:45:07,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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) [2021-06-01 19:45:07,628 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1187 transitions. [2021-06-01 19:45:07,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-01 19:45:07,629 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:45:07,629 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:45:07,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-01 19:45:07,854 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:45:07,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:45:07,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1228173758, now seen corresponding path program 30 times [2021-06-01 19:45:07,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:45:07,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856206923] [2021-06-01 19:45:07,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:45:07,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:45:08,485 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:45:08,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:45:08,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856206923] [2021-06-01 19:45:08,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856206923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:45:08,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799227630] [2021-06-01 19:45:08,486 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 [2021-06-01 19:45:08,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-01 19:45:08,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:45:08,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-01 19:45:08,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:45:10,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-01 19:45:10,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-01 19:45:10,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:45:10,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:45:10,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:45:10,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-01 19:45:10,229 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 136 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:45:10,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799227630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:45:10,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:45:10,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2021-06-01 19:45:10,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257865063] [2021-06-01 19:45:10,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-06-01 19:45:10,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:45:10,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-06-01 19:45:10,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=700, Invalid=4270, Unknown=0, NotChecked=0, Total=4970 [2021-06-01 19:45:10,230 INFO L87 Difference]: Start difference. First operand 573 states and 1187 transitions. Second operand has 71 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:45:25,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:45:25,577 INFO L93 Difference]: Finished difference Result 5479 states and 10739 transitions. [2021-06-01 19:45:25,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2021-06-01 19:45:25,577 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-01 19:45:25,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:45:25,587 INFO L225 Difference]: With dead ends: 5479 [2021-06-01 19:45:25,587 INFO L226 Difference]: Without dead ends: 3672 [2021-06-01 19:45:25,591 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23730 ImplicationChecksByTransitivity, 15794.2ms TimeCoverageRelationStatistics Valid=13164, Invalid=62736, Unknown=0, NotChecked=0, Total=75900 [2021-06-01 19:45:25,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3672 states. [2021-06-01 19:45:25,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3672 to 595. [2021-06-01 19:45:25,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 2.0757575757575757) internal successors, (1233), 594 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:45:25,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1233 transitions. [2021-06-01 19:45:25,611 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1233 transitions. Word has length 43 [2021-06-01 19:45:25,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:45:25,611 INFO L482 AbstractCegarLoop]: Abstraction has 595 states and 1233 transitions. [2021-06-01 19:45:25,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:45:25,611 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1233 transitions. [2021-06-01 19:45:25,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-01 19:45:25,612 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:45:25,612 INFO L554 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:45:25,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:45:25,825 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:45:25,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:45:25,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1297123594, now seen corresponding path program 31 times [2021-06-01 19:45:25,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:45:25,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891002577] [2021-06-01 19:45:25,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:45:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:45:26,580 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:45:26,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:45:26,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891002577] [2021-06-01 19:45:26,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891002577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:45:26,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185818575] [2021-06-01 19:45:26,580 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 [2021-06-01 19:45:26,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:45:26,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 75 conjunts are in the unsatisfiable core [2021-06-01 19:45:26,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:45:26,717 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 11 treesize of output 7 [2021-06-01 19:45:26,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:45:26,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:45:26,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:45:26,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:45:26,724 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:45:26,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185818575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:45:26,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:45:26,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-01 19:45:26,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383472809] [2021-06-01 19:45:26,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-01 19:45:26,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:45:26,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-01 19:45:26,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2021-06-01 19:45:26,725 INFO L87 Difference]: Start difference. First operand 595 states and 1233 transitions. Second operand has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 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) [2021-06-01 19:45:28,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:45:28,591 INFO L93 Difference]: Finished difference Result 1255 states and 2466 transitions. [2021-06-01 19:45:28,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-01 19:45:28,592 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 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 45 [2021-06-01 19:45:28,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:45:28,594 INFO L225 Difference]: With dead ends: 1255 [2021-06-01 19:45:28,594 INFO L226 Difference]: Without dead ends: 805 [2021-06-01 19:45:28,594 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 2094.3ms TimeCoverageRelationStatistics Valid=831, Invalid=4719, Unknown=0, NotChecked=0, Total=5550 [2021-06-01 19:45:28,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2021-06-01 19:45:28,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 106. [2021-06-01 19:45:28,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 105 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:45:28,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 206 transitions. [2021-06-01 19:45:28,598 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 206 transitions. Word has length 45 [2021-06-01 19:45:28,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:45:28,598 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 206 transitions. [2021-06-01 19:45:28,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 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) [2021-06-01 19:45:28,598 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 206 transitions. [2021-06-01 19:45:28,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-01 19:45:28,598 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:45:28,599 INFO L554 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:45:28,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-01 19:45:28,821 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:45:28,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:45:28,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1533055049, now seen corresponding path program 32 times [2021-06-01 19:45:28,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:45:28,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992785373] [2021-06-01 19:45:28,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:45:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:45:29,039 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:45:29,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:45:29,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992785373] [2021-06-01 19:45:29,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992785373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:45:29,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698053489] [2021-06-01 19:45:29,040 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) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:45:29,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 19:45:29,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:45:29,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-01 19:45:29,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:45:29,188 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:45:29,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698053489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:45:29,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:45:29,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 21 [2021-06-01 19:45:29,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065322251] [2021-06-01 19:45:29,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-01 19:45:29,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:45:29,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-01 19:45:29,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-06-01 19:45:29,190 INFO L87 Difference]: Start difference. First operand 106 states and 206 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:45:29,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:45:29,246 INFO L93 Difference]: Finished difference Result 849 states and 1629 transitions. [2021-06-01 19:45:29,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-01 19:45:29,247 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 46 [2021-06-01 19:45:29,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:45:29,249 INFO L225 Difference]: With dead ends: 849 [2021-06-01 19:45:29,249 INFO L226 Difference]: Without dead ends: 810 [2021-06-01 19:45:29,250 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 176.9ms TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-06-01 19:45:29,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2021-06-01 19:45:29,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 696. [2021-06-01 19:45:29,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 695 states have (on average 2.0705035971223023) internal successors, (1439), 695 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:45:29,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1439 transitions. [2021-06-01 19:45:29,259 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1439 transitions. Word has length 46 [2021-06-01 19:45:29,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:45:29,259 INFO L482 AbstractCegarLoop]: Abstraction has 696 states and 1439 transitions. [2021-06-01 19:45:29,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:45:29,259 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1439 transitions. [2021-06-01 19:45:29,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-01 19:45:29,260 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:45:29,260 INFO L554 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:45:29,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-01 19:45:29,469 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:45:29,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:45:29,469 INFO L82 PathProgramCache]: Analyzing trace with hash 768577026, now seen corresponding path program 33 times [2021-06-01 19:45:29,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:45:29,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956078505] [2021-06-01 19:45:29,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:45:29,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:45:30,295 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:45:30,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:45:30,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956078505] [2021-06-01 19:45:30,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956078505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:45:30,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965680423] [2021-06-01 19:45:30,296 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:45:30,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-01 19:45:30,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:45:30,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 79 conjunts are in the unsatisfiable core [2021-06-01 19:45:30,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:45:30,450 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 11 treesize of output 7 [2021-06-01 19:45:30,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:45:30,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:45:30,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:45:30,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:45:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:45:30,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965680423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:45:30,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:45:30,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2021-06-01 19:45:30,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282724324] [2021-06-01 19:45:30,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-01 19:45:30,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:45:30,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-01 19:45:30,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2021-06-01 19:45:30,460 INFO L87 Difference]: Start difference. First operand 696 states and 1439 transitions. Second operand has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 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) [2021-06-01 19:45:32,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:45:32,518 INFO L93 Difference]: Finished difference Result 1425 states and 2801 transitions. [2021-06-01 19:45:32,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-01 19:45:32,518 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 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 47 [2021-06-01 19:45:32,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:45:32,520 INFO L225 Difference]: With dead ends: 1425 [2021-06-01 19:45:32,520 INFO L226 Difference]: Without dead ends: 889 [2021-06-01 19:45:32,520 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 2316.0ms TimeCoverageRelationStatistics Valid=915, Invalid=5247, Unknown=0, NotChecked=0, Total=6162 [2021-06-01 19:45:32,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2021-06-01 19:45:32,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 111. [2021-06-01 19:45:32,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.9636363636363636) internal successors, (216), 110 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:45:32,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 216 transitions. [2021-06-01 19:45:32,523 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 216 transitions. Word has length 47 [2021-06-01 19:45:32,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:45:32,523 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 216 transitions. [2021-06-01 19:45:32,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 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) [2021-06-01 19:45:32,523 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 216 transitions. [2021-06-01 19:45:32,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-01 19:45:32,524 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:45:32,524 INFO L554 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:45:32,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-01 19:45:32,732 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:45:32,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:45:32,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1920845269, now seen corresponding path program 34 times [2021-06-01 19:45:32,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:45:32,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128723410] [2021-06-01 19:45:32,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:45:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:45:32,946 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:45:32,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:45:32,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128723410] [2021-06-01 19:45:32,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128723410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:45:32,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079893746] [2021-06-01 19:45:32,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:45:32,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 19:45:32,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:45:32,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-01 19:45:32,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:45:33,082 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:45:33,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079893746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:45:33,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:45:33,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 22 [2021-06-01 19:45:33,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365514796] [2021-06-01 19:45:33,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-01 19:45:33,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:45:33,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-01 19:45:33,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-06-01 19:45:33,084 INFO L87 Difference]: Start difference. First operand 111 states and 216 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:45:33,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:45:33,158 INFO L93 Difference]: Finished difference Result 923 states and 1774 transitions. [2021-06-01 19:45:33,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-01 19:45:33,158 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-01 19:45:33,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:45:33,160 INFO L225 Difference]: With dead ends: 923 [2021-06-01 19:45:33,160 INFO L226 Difference]: Without dead ends: 882 [2021-06-01 19:45:33,160 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 181.3ms TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-06-01 19:45:33,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-06-01 19:45:33,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 762. [2021-06-01 19:45:33,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 2.0683311432325886) internal successors, (1574), 761 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:45:33,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1574 transitions. [2021-06-01 19:45:33,170 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1574 transitions. Word has length 48 [2021-06-01 19:45:33,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:45:33,170 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 1574 transitions. [2021-06-01 19:45:33,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:45:33,171 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1574 transitions. [2021-06-01 19:45:33,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-01 19:45:33,172 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:45:33,172 INFO L554 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:45:33,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-01 19:45:33,395 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:45:33,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:45:33,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1960578634, now seen corresponding path program 35 times [2021-06-01 19:45:33,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:45:33,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555251425] [2021-06-01 19:45:33,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:45:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:45:34,242 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:45:34,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:45:34,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555251425] [2021-06-01 19:45:34,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555251425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:45:34,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216403995] [2021-06-01 19:45:34,242 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:45:34,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-01 19:45:34,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:45:34,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-01 19:45:34,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:45:36,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-01 19:45:36,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-01 19:45:36,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:45:36,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:45:36,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:45:36,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-01 19:45:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 190 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:45:36,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216403995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:45:36,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:45:36,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 82 [2021-06-01 19:45:36,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971294902] [2021-06-01 19:45:36,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-06-01 19:45:36,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:45:36,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-06-01 19:45:36,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=943, Invalid=5863, Unknown=0, NotChecked=0, Total=6806 [2021-06-01 19:45:36,722 INFO L87 Difference]: Start difference. First operand 762 states and 1574 transitions. Second operand has 83 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 82 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:02,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:46:02,111 INFO L93 Difference]: Finished difference Result 8032 states and 15779 transitions. [2021-06-01 19:46:02,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 294 states. [2021-06-01 19:46:02,112 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 82 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-01 19:46:02,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:46:02,127 INFO L225 Difference]: With dead ends: 8032 [2021-06-01 19:46:02,127 INFO L226 Difference]: Without dead ends: 5607 [2021-06-01 19:46:02,132 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 352 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41000 ImplicationChecksByTransitivity, 25607.4ms TimeCoverageRelationStatistics Valid=21491, Invalid=103471, Unknown=0, NotChecked=0, Total=124962 [2021-06-01 19:46:02,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5607 states. [2021-06-01 19:46:02,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5607 to 787. [2021-06-01 19:46:02,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 2.068702290076336) internal successors, (1626), 786 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:02,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1626 transitions. [2021-06-01 19:46:02,158 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1626 transitions. Word has length 49 [2021-06-01 19:46:02,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:46:02,158 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 1626 transitions. [2021-06-01 19:46:02,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 82 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:02,158 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1626 transitions. [2021-06-01 19:46:02,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-01 19:46:02,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:46:02,160 INFO L554 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:46:02,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-01 19:46:02,378 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:46:02,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:46:02,379 INFO L82 PathProgramCache]: Analyzing trace with hash -154382910, now seen corresponding path program 36 times [2021-06-01 19:46:02,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:46:02,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94856127] [2021-06-01 19:46:02,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:46:02,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:46:03,498 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:03,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:46:03,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94856127] [2021-06-01 19:46:03,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94856127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:03,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013545468] [2021-06-01 19:46:03,498 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:46:03,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-01 19:46:03,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:46:03,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 87 conjunts are in the unsatisfiable core [2021-06-01 19:46:03,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:46:03,641 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 11 treesize of output 7 [2021-06-01 19:46:03,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:46:03,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:46:03,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:46:03,645 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:46:03,650 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:03,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013545468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:03,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:46:03,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2021-06-01 19:46:03,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574426837] [2021-06-01 19:46:03,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-01 19:46:03,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:46:03,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-01 19:46:03,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2021-06-01 19:46:03,651 INFO L87 Difference]: Start difference. First operand 787 states and 1626 transitions. Second operand has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:06,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:46:06,204 INFO L93 Difference]: Finished difference Result 1651 states and 3252 transitions. [2021-06-01 19:46:06,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-01 19:46:06,205 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-01 19:46:06,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:46:06,207 INFO L225 Difference]: With dead ends: 1651 [2021-06-01 19:46:06,207 INFO L226 Difference]: Without dead ends: 1063 [2021-06-01 19:46:06,207 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 2965.7ms TimeCoverageRelationStatistics Valid=1095, Invalid=6387, Unknown=0, NotChecked=0, Total=7482 [2021-06-01 19:46:06,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2021-06-01 19:46:06,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 121. [2021-06-01 19:46:06,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.9666666666666666) internal successors, (236), 120 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:06,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 236 transitions. [2021-06-01 19:46:06,212 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 236 transitions. Word has length 51 [2021-06-01 19:46:06,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:46:06,212 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 236 transitions. [2021-06-01 19:46:06,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:06,213 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 236 transitions. [2021-06-01 19:46:06,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-01 19:46:06,213 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:46:06,213 INFO L554 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:46:06,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-01 19:46:06,429 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:46:06,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:46:06,429 INFO L82 PathProgramCache]: Analyzing trace with hash -467832213, now seen corresponding path program 37 times [2021-06-01 19:46:06,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:46:06,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249385311] [2021-06-01 19:46:06,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:46:06,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:46:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:06,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:46:06,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249385311] [2021-06-01 19:46:06,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249385311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:06,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225066486] [2021-06-01 19:46:06,736 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:46:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:46:06,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-01 19:46:06,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:46:06,897 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:06,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225066486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:06,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:46:06,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 24 [2021-06-01 19:46:06,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721144592] [2021-06-01 19:46:06,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-01 19:46:06,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:46:06,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-01 19:46:06,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-06-01 19:46:06,898 INFO L87 Difference]: Start difference. First operand 121 states and 236 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:06,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:46:06,971 INFO L93 Difference]: Finished difference Result 1080 states and 2082 transitions. [2021-06-01 19:46:06,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-01 19:46:06,971 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-01 19:46:06,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:46:06,974 INFO L225 Difference]: With dead ends: 1080 [2021-06-01 19:46:06,974 INFO L226 Difference]: Without dead ends: 1035 [2021-06-01 19:46:06,974 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 270.1ms TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-06-01 19:46:06,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2021-06-01 19:46:06,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 903. [2021-06-01 19:46:06,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 2.0643015521064303) internal successors, (1862), 902 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:06,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1862 transitions. [2021-06-01 19:46:06,984 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1862 transitions. Word has length 52 [2021-06-01 19:46:06,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:46:06,985 INFO L482 AbstractCegarLoop]: Abstraction has 903 states and 1862 transitions. [2021-06-01 19:46:06,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:06,985 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1862 transitions. [2021-06-01 19:46:06,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-01 19:46:06,986 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:46:06,986 INFO L554 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:46:07,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-01 19:46:07,193 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:46:07,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:46:07,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1135766646, now seen corresponding path program 38 times [2021-06-01 19:46:07,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:46:07,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647340404] [2021-06-01 19:46:07,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:46:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:46:08,283 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:08,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:46:08,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647340404] [2021-06-01 19:46:08,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647340404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:08,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670997192] [2021-06-01 19:46:08,283 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:46:08,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 19:46:08,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:46:08,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 91 conjunts are in the unsatisfiable core [2021-06-01 19:46:08,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:46:08,464 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 11 treesize of output 7 [2021-06-01 19:46:08,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:46:08,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:46:08,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:46:08,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:46:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:08,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670997192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:08,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:46:08,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2021-06-01 19:46:08,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234483088] [2021-06-01 19:46:08,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-01 19:46:08,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:46:08,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-01 19:46:08,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2021-06-01 19:46:08,473 INFO L87 Difference]: Start difference. First operand 903 states and 1862 transitions. Second operand has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 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) [2021-06-01 19:46:11,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:46:11,295 INFO L93 Difference]: Finished difference Result 1845 states and 3635 transitions. [2021-06-01 19:46:11,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-01 19:46:11,295 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 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 53 [2021-06-01 19:46:11,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:46:11,297 INFO L225 Difference]: With dead ends: 1845 [2021-06-01 19:46:11,297 INFO L226 Difference]: Without dead ends: 1159 [2021-06-01 19:46:11,297 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 3151.1ms TimeCoverageRelationStatistics Valid=1191, Invalid=6999, Unknown=0, NotChecked=0, Total=8190 [2021-06-01 19:46:11,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-06-01 19:46:11,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 126. [2021-06-01 19:46:11,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.968) internal successors, (246), 125 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:11,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 246 transitions. [2021-06-01 19:46:11,301 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 246 transitions. Word has length 53 [2021-06-01 19:46:11,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:46:11,301 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 246 transitions. [2021-06-01 19:46:11,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 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) [2021-06-01 19:46:11,301 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 246 transitions. [2021-06-01 19:46:11,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-01 19:46:11,302 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:46:11,302 INFO L554 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:46:11,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-01 19:46:11,524 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:46:11,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:46:11,524 INFO L82 PathProgramCache]: Analyzing trace with hash 872098359, now seen corresponding path program 39 times [2021-06-01 19:46:11,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:46:11,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030044302] [2021-06-01 19:46:11,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:46:11,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:46:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:11,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:46:11,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030044302] [2021-06-01 19:46:11,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030044302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:11,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232253348] [2021-06-01 19:46:11,824 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:46:11,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-01 19:46:11,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:46:11,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-01 19:46:11,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:46:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:11,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232253348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:11,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:46:11,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 25 [2021-06-01 19:46:11,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422116970] [2021-06-01 19:46:11,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-01 19:46:11,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:46:11,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-01 19:46:11,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-06-01 19:46:11,983 INFO L87 Difference]: Start difference. First operand 126 states and 246 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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) [2021-06-01 19:46:12,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:46:12,061 INFO L93 Difference]: Finished difference Result 1163 states and 2245 transitions. [2021-06-01 19:46:12,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-01 19:46:12,061 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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 54 [2021-06-01 19:46:12,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:46:12,063 INFO L225 Difference]: With dead ends: 1163 [2021-06-01 19:46:12,063 INFO L226 Difference]: Without dead ends: 1116 [2021-06-01 19:46:12,063 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 256.7ms TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-06-01 19:46:12,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-06-01 19:46:12,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 978. [2021-06-01 19:46:12,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 2.0624360286591608) internal successors, (2015), 977 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:12,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 2015 transitions. [2021-06-01 19:46:12,075 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 2015 transitions. Word has length 54 [2021-06-01 19:46:12,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:46:12,075 INFO L482 AbstractCegarLoop]: Abstraction has 978 states and 2015 transitions. [2021-06-01 19:46:12,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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) [2021-06-01 19:46:12,075 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 2015 transitions. [2021-06-01 19:46:12,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-01 19:46:12,076 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:46:12,076 INFO L554 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:46:12,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:46:12,297 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:46:12,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:46:12,297 INFO L82 PathProgramCache]: Analyzing trace with hash 37342594, now seen corresponding path program 40 times [2021-06-01 19:46:12,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:46:12,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423540208] [2021-06-01 19:46:12,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:46:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:46:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:13,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:46:13,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423540208] [2021-06-01 19:46:13,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423540208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:13,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462878778] [2021-06-01 19:46:13,394 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:46:13,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 19:46:13,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:46:13,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 95 conjunts are in the unsatisfiable core [2021-06-01 19:46:13,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:46:13,546 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 11 treesize of output 7 [2021-06-01 19:46:13,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:46:13,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:46:13,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:46:13,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:46:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:13,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462878778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:13,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:46:13,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2021-06-01 19:46:13,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145021142] [2021-06-01 19:46:13,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-06-01 19:46:13,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:46:13,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-06-01 19:46:13,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2021-06-01 19:46:13,554 INFO L87 Difference]: Start difference. First operand 978 states and 2015 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:16,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:46:16,663 INFO L93 Difference]: Finished difference Result 1997 states and 3937 transitions. [2021-06-01 19:46:16,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-01 19:46:16,664 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-01 19:46:16,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:46:16,666 INFO L225 Difference]: With dead ends: 1997 [2021-06-01 19:46:16,666 INFO L226 Difference]: Without dead ends: 1257 [2021-06-01 19:46:16,666 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 3390.0ms TimeCoverageRelationStatistics Valid=1291, Invalid=7639, Unknown=0, NotChecked=0, Total=8930 [2021-06-01 19:46:16,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-06-01 19:46:16,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 131. [2021-06-01 19:46:16,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.9692307692307693) internal successors, (256), 130 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:16,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 256 transitions. [2021-06-01 19:46:16,673 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 256 transitions. Word has length 55 [2021-06-01 19:46:16,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:46:16,673 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 256 transitions. [2021-06-01 19:46:16,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:16,673 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 256 transitions. [2021-06-01 19:46:16,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-01 19:46:16,674 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:46:16,674 INFO L554 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:46:16,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:46:16,878 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:46:16,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:46:16,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1180691115, now seen corresponding path program 41 times [2021-06-01 19:46:16,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:46:16,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965174094] [2021-06-01 19:46:16,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:46:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:46:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:17,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:46:17,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965174094] [2021-06-01 19:46:17,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965174094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:17,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398917553] [2021-06-01 19:46:17,193 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:46:17,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-01 19:46:17,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:46:17,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-01 19:46:17,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:46:17,362 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:17,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398917553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:17,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:46:17,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 26 [2021-06-01 19:46:17,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977872467] [2021-06-01 19:46:17,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-01 19:46:17,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:46:17,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-01 19:46:17,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-06-01 19:46:17,363 INFO L87 Difference]: Start difference. First operand 131 states and 256 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:17,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:46:17,425 INFO L93 Difference]: Finished difference Result 1249 states and 2414 transitions. [2021-06-01 19:46:17,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-01 19:46:17,425 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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 56 [2021-06-01 19:46:17,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:46:17,427 INFO L225 Difference]: With dead ends: 1249 [2021-06-01 19:46:17,427 INFO L226 Difference]: Without dead ends: 1200 [2021-06-01 19:46:17,427 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 275.4ms TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-06-01 19:46:17,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-06-01 19:46:17,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1056. [2021-06-01 19:46:17,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1055 states have (on average 2.060663507109005) internal successors, (2174), 1055 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:17,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 2174 transitions. [2021-06-01 19:46:17,438 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 2174 transitions. Word has length 56 [2021-06-01 19:46:17,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:46:17,439 INFO L482 AbstractCegarLoop]: Abstraction has 1056 states and 2174 transitions. [2021-06-01 19:46:17,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:17,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 2174 transitions. [2021-06-01 19:46:17,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-01 19:46:17,440 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:46:17,440 INFO L554 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:46:17,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-01 19:46:17,658 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:46:17,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:46:17,659 INFO L82 PathProgramCache]: Analyzing trace with hash 2139285302, now seen corresponding path program 42 times [2021-06-01 19:46:17,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:46:17,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972792836] [2021-06-01 19:46:17,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:46:17,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:46:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:18,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:46:18,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972792836] [2021-06-01 19:46:18,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972792836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:18,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570006730] [2021-06-01 19:46:18,863 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:46:18,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-01 19:46:18,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:46:18,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 99 conjunts are in the unsatisfiable core [2021-06-01 19:46:18,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:46:19,008 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 11 treesize of output 7 [2021-06-01 19:46:19,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:46:19,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:46:19,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:46:19,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:46:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:19,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570006730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:19,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:46:19,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2021-06-01 19:46:19,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325711190] [2021-06-01 19:46:19,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-01 19:46:19,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:46:19,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-01 19:46:19,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2021-06-01 19:46:19,035 INFO L87 Difference]: Start difference. First operand 1056 states and 2174 transitions. Second operand has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 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) [2021-06-01 19:46:22,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:46:22,447 INFO L93 Difference]: Finished difference Result 2155 states and 4251 transitions. [2021-06-01 19:46:22,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-01 19:46:22,447 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 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 57 [2021-06-01 19:46:22,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:46:22,449 INFO L225 Difference]: With dead ends: 2155 [2021-06-01 19:46:22,449 INFO L226 Difference]: Without dead ends: 1359 [2021-06-01 19:46:22,450 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 3732.3ms TimeCoverageRelationStatistics Valid=1395, Invalid=8307, Unknown=0, NotChecked=0, Total=9702 [2021-06-01 19:46:22,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-06-01 19:46:22,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 136. [2021-06-01 19:46:22,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 135 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:22,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 266 transitions. [2021-06-01 19:46:22,456 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 266 transitions. Word has length 57 [2021-06-01 19:46:22,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:46:22,457 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 266 transitions. [2021-06-01 19:46:22,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 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) [2021-06-01 19:46:22,457 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 266 transitions. [2021-06-01 19:46:22,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-06-01 19:46:22,457 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:46:22,457 INFO L554 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:46:22,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:46:22,673 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:46:22,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:46:22,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1916405623, now seen corresponding path program 43 times [2021-06-01 19:46:22,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:46:22,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709750540] [2021-06-01 19:46:22,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:46:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:46:23,048 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:23,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:46:23,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709750540] [2021-06-01 19:46:23,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709750540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:23,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616130116] [2021-06-01 19:46:23,049 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:46:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:46:23,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-01 19:46:23,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:46:23,234 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:23,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616130116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:23,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:46:23,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 27 [2021-06-01 19:46:23,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131478436] [2021-06-01 19:46:23,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-01 19:46:23,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:46:23,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-01 19:46:23,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-06-01 19:46:23,235 INFO L87 Difference]: Start difference. First operand 136 states and 266 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:23,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:46:23,322 INFO L93 Difference]: Finished difference Result 1338 states and 2589 transitions. [2021-06-01 19:46:23,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-01 19:46:23,323 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-06-01 19:46:23,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:46:23,325 INFO L225 Difference]: With dead ends: 1338 [2021-06-01 19:46:23,325 INFO L226 Difference]: Without dead ends: 1287 [2021-06-01 19:46:23,325 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 338.0ms TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-06-01 19:46:23,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-06-01 19:46:23,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1137. [2021-06-01 19:46:23,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 2.0589788732394365) internal successors, (2339), 1136 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:23,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 2339 transitions. [2021-06-01 19:46:23,338 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 2339 transitions. Word has length 58 [2021-06-01 19:46:23,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:46:23,338 INFO L482 AbstractCegarLoop]: Abstraction has 1137 states and 2339 transitions. [2021-06-01 19:46:23,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:23,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 2339 transitions. [2021-06-01 19:46:23,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-01 19:46:23,340 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:46:23,340 INFO L554 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:46:23,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:46:23,563 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:46:23,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:46:23,563 INFO L82 PathProgramCache]: Analyzing trace with hash -292549310, now seen corresponding path program 44 times [2021-06-01 19:46:23,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:46:23,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102422182] [2021-06-01 19:46:23,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:46:23,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:46:24,798 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:24,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:46:24,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102422182] [2021-06-01 19:46:24,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102422182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:24,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564417684] [2021-06-01 19:46:24,798 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:46:24,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 19:46:24,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:46:24,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 103 conjunts are in the unsatisfiable core [2021-06-01 19:46:24,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:46:24,957 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 11 treesize of output 7 [2021-06-01 19:46:24,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:46:24,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:46:24,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:46:24,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:46:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:24,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564417684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:24,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:46:24,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2021-06-01 19:46:24,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854073477] [2021-06-01 19:46:24,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-06-01 19:46:24,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:46:24,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-06-01 19:46:24,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2021-06-01 19:46:24,967 INFO L87 Difference]: Start difference. First operand 1137 states and 2339 transitions. Second operand has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:28,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:46:28,659 INFO L93 Difference]: Finished difference Result 2319 states and 4577 transitions. [2021-06-01 19:46:28,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-01 19:46:28,660 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 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 59 [2021-06-01 19:46:28,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:46:28,662 INFO L225 Difference]: With dead ends: 2319 [2021-06-01 19:46:28,662 INFO L226 Difference]: Without dead ends: 1465 [2021-06-01 19:46:28,663 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 3989.7ms TimeCoverageRelationStatistics Valid=1503, Invalid=9003, Unknown=0, NotChecked=0, Total=10506 [2021-06-01 19:46:28,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2021-06-01 19:46:28,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 141. [2021-06-01 19:46:28,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.9714285714285715) internal successors, (276), 140 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:28,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 276 transitions. [2021-06-01 19:46:28,669 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 276 transitions. Word has length 59 [2021-06-01 19:46:28,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:46:28,670 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 276 transitions. [2021-06-01 19:46:28,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:28,670 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 276 transitions. [2021-06-01 19:46:28,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-01 19:46:28,670 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:46:28,670 INFO L554 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:46:28,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-01 19:46:28,893 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:46:28,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:46:28,893 INFO L82 PathProgramCache]: Analyzing trace with hash -456023317, now seen corresponding path program 45 times [2021-06-01 19:46:28,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:46:28,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243959062] [2021-06-01 19:46:28,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:46:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:46:29,264 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:29,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:46:29,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243959062] [2021-06-01 19:46:29,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243959062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:29,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931075024] [2021-06-01 19:46:29,264 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:46:29,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-01 19:46:29,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:46:29,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-01 19:46:29,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:46:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:29,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931075024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:29,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:46:29,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 28 [2021-06-01 19:46:29,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687138138] [2021-06-01 19:46:29,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-01 19:46:29,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:46:29,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-01 19:46:29,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-06-01 19:46:29,462 INFO L87 Difference]: Start difference. First operand 141 states and 276 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:29,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:46:29,539 INFO L93 Difference]: Finished difference Result 1430 states and 2770 transitions. [2021-06-01 19:46:29,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-01 19:46:29,539 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-01 19:46:29,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:46:29,541 INFO L225 Difference]: With dead ends: 1430 [2021-06-01 19:46:29,541 INFO L226 Difference]: Without dead ends: 1377 [2021-06-01 19:46:29,541 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 334.1ms TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-06-01 19:46:29,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2021-06-01 19:46:29,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 1221. [2021-06-01 19:46:29,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 2.057377049180328) internal successors, (2510), 1220 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:29,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 2510 transitions. [2021-06-01 19:46:29,556 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 2510 transitions. Word has length 60 [2021-06-01 19:46:29,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:46:29,556 INFO L482 AbstractCegarLoop]: Abstraction has 1221 states and 2510 transitions. [2021-06-01 19:46:29,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:29,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 2510 transitions. [2021-06-01 19:46:29,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-06-01 19:46:29,558 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:46:29,558 INFO L554 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:46:29,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-01 19:46:29,773 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:46:29,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:46:29,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1547869706, now seen corresponding path program 46 times [2021-06-01 19:46:29,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:46:29,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354801409] [2021-06-01 19:46:29,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:46:29,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:46:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:31,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:46:31,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354801409] [2021-06-01 19:46:31,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354801409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:31,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015840450] [2021-06-01 19:46:31,105 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:46:31,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 19:46:31,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:46:31,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 107 conjunts are in the unsatisfiable core [2021-06-01 19:46:31,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:46:31,272 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 11 treesize of output 7 [2021-06-01 19:46:31,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:46:31,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:46:31,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:46:31,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:46:31,279 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:31,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015840450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:31,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:46:31,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2021-06-01 19:46:31,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064790285] [2021-06-01 19:46:31,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-06-01 19:46:31,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:46:31,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-06-01 19:46:31,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2021-06-01 19:46:31,280 INFO L87 Difference]: Start difference. First operand 1221 states and 2510 transitions. Second operand has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:35,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:46:35,337 INFO L93 Difference]: Finished difference Result 2489 states and 4915 transitions. [2021-06-01 19:46:35,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-01 19:46:35,337 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-06-01 19:46:35,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:46:35,339 INFO L225 Difference]: With dead ends: 2489 [2021-06-01 19:46:35,339 INFO L226 Difference]: Without dead ends: 1575 [2021-06-01 19:46:35,339 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 4353.6ms TimeCoverageRelationStatistics Valid=1615, Invalid=9727, Unknown=0, NotChecked=0, Total=11342 [2021-06-01 19:46:35,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-06-01 19:46:35,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 146. [2021-06-01 19:46:35,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.9724137931034482) internal successors, (286), 145 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:35,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 286 transitions. [2021-06-01 19:46:35,345 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 286 transitions. Word has length 61 [2021-06-01 19:46:35,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:46:35,345 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 286 transitions. [2021-06-01 19:46:35,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:35,345 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 286 transitions. [2021-06-01 19:46:35,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-01 19:46:35,345 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:46:35,345 INFO L554 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:46:35,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-01 19:46:35,546 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:46:35,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:46:35,546 INFO L82 PathProgramCache]: Analyzing trace with hash -716249929, now seen corresponding path program 47 times [2021-06-01 19:46:35,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:46:35,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106746046] [2021-06-01 19:46:35,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:46:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:46:35,906 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:35,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:46:35,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106746046] [2021-06-01 19:46:35,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106746046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:35,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036576386] [2021-06-01 19:46:35,906 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:46:35,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-01 19:46:35,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:46:35,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 54 conjunts are in the unsatisfiable core [2021-06-01 19:46:35,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:46:36,081 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:36,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036576386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:36,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:46:36,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 29 [2021-06-01 19:46:36,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065163361] [2021-06-01 19:46:36,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-01 19:46:36,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:46:36,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-01 19:46:36,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-06-01 19:46:36,082 INFO L87 Difference]: Start difference. First operand 146 states and 286 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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) [2021-06-01 19:46:36,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:46:36,157 INFO L93 Difference]: Finished difference Result 1525 states and 2957 transitions. [2021-06-01 19:46:36,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-01 19:46:36,157 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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 62 [2021-06-01 19:46:36,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:46:36,159 INFO L225 Difference]: With dead ends: 1525 [2021-06-01 19:46:36,159 INFO L226 Difference]: Without dead ends: 1470 [2021-06-01 19:46:36,159 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 320.7ms TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-06-01 19:46:36,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2021-06-01 19:46:36,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1308. [2021-06-01 19:46:36,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1308 states, 1307 states have (on average 2.0558530986993113) internal successors, (2687), 1307 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:36,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 2687 transitions. [2021-06-01 19:46:36,174 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 2687 transitions. Word has length 62 [2021-06-01 19:46:36,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:46:36,174 INFO L482 AbstractCegarLoop]: Abstraction has 1308 states and 2687 transitions. [2021-06-01 19:46:36,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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) [2021-06-01 19:46:36,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 2687 transitions. [2021-06-01 19:46:36,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-01 19:46:36,176 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:46:36,176 INFO L554 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:46:36,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:46:36,399 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:46:36,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:46:36,399 INFO L82 PathProgramCache]: Analyzing trace with hash -2008609534, now seen corresponding path program 48 times [2021-06-01 19:46:36,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:46:36,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942908367] [2021-06-01 19:46:36,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:46:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:46:37,842 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:37,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:46:37,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942908367] [2021-06-01 19:46:37,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942908367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:37,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74789013] [2021-06-01 19:46:37,843 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:46:37,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-01 19:46:37,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:46:37,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 111 conjunts are in the unsatisfiable core [2021-06-01 19:46:37,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:46:38,004 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 11 treesize of output 7 [2021-06-01 19:46:38,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:46:38,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:46:38,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:46:38,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:46:38,012 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:38,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74789013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:38,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:46:38,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2021-06-01 19:46:38,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848842960] [2021-06-01 19:46:38,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-06-01 19:46:38,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:46:38,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-06-01 19:46:38,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2021-06-01 19:46:38,013 INFO L87 Difference]: Start difference. First operand 1308 states and 2687 transitions. Second operand has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:42,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:46:42,439 INFO L93 Difference]: Finished difference Result 2665 states and 5265 transitions. [2021-06-01 19:46:42,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-01 19:46:42,439 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-01 19:46:42,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:46:42,441 INFO L225 Difference]: With dead ends: 2665 [2021-06-01 19:46:42,441 INFO L226 Difference]: Without dead ends: 1689 [2021-06-01 19:46:42,442 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 4710.5ms TimeCoverageRelationStatistics Valid=1731, Invalid=10479, Unknown=0, NotChecked=0, Total=12210 [2021-06-01 19:46:42,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2021-06-01 19:46:42,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 151. [2021-06-01 19:46:42,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.9733333333333334) internal successors, (296), 150 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:42,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 296 transitions. [2021-06-01 19:46:42,448 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 296 transitions. Word has length 63 [2021-06-01 19:46:42,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:46:42,448 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 296 transitions. [2021-06-01 19:46:42,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:42,448 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 296 transitions. [2021-06-01 19:46:42,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-06-01 19:46:42,449 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:46:42,449 INFO L554 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:46:42,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-01 19:46:42,649 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:46:42,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:46:42,650 INFO L82 PathProgramCache]: Analyzing trace with hash -2114282709, now seen corresponding path program 49 times [2021-06-01 19:46:42,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:46:42,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473030896] [2021-06-01 19:46:42,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:46:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:46:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:43,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:46:43,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473030896] [2021-06-01 19:46:43,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473030896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:43,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740609714] [2021-06-01 19:46:43,037 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:46:43,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:46:43,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 56 conjunts are in the unsatisfiable core [2021-06-01 19:46:43,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:46:43,219 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:43,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740609714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:43,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:46:43,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 30 [2021-06-01 19:46:43,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921156832] [2021-06-01 19:46:43,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-01 19:46:43,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:46:43,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-01 19:46:43,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-06-01 19:46:43,220 INFO L87 Difference]: Start difference. First operand 151 states and 296 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:43,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:46:43,300 INFO L93 Difference]: Finished difference Result 1623 states and 3150 transitions. [2021-06-01 19:46:43,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-01 19:46:43,301 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-06-01 19:46:43,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:46:43,303 INFO L225 Difference]: With dead ends: 1623 [2021-06-01 19:46:43,303 INFO L226 Difference]: Without dead ends: 1566 [2021-06-01 19:46:43,303 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 351.1ms TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-06-01 19:46:43,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2021-06-01 19:46:43,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 1398. [2021-06-01 19:46:43,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 2.0544022906227632) internal successors, (2870), 1397 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:43,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 2870 transitions. [2021-06-01 19:46:43,319 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 2870 transitions. Word has length 64 [2021-06-01 19:46:43,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:46:43,319 INFO L482 AbstractCegarLoop]: Abstraction has 1398 states and 2870 transitions. [2021-06-01 19:46:43,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:43,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 2870 transitions. [2021-06-01 19:46:43,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-01 19:46:43,321 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:46:43,321 INFO L554 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:46:43,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:46:43,543 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:46:43,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:46:43,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1468652726, now seen corresponding path program 50 times [2021-06-01 19:46:43,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:46:43,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472849810] [2021-06-01 19:46:43,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:46:43,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:46:45,047 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:45,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:46:45,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472849810] [2021-06-01 19:46:45,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472849810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:45,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15404347] [2021-06-01 19:46:45,048 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:46:45,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 19:46:45,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:46:45,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 115 conjunts are in the unsatisfiable core [2021-06-01 19:46:45,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:46:45,224 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 11 treesize of output 7 [2021-06-01 19:46:45,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:46:45,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:46:45,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:46:45,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:46:45,232 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:45,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15404347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:45,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:46:45,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2021-06-01 19:46:45,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186082296] [2021-06-01 19:46:45,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-06-01 19:46:45,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:46:45,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-06-01 19:46:45,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2021-06-01 19:46:45,233 INFO L87 Difference]: Start difference. First operand 1398 states and 2870 transitions. Second operand has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 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) [2021-06-01 19:46:49,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:46:49,944 INFO L93 Difference]: Finished difference Result 2847 states and 5627 transitions. [2021-06-01 19:46:49,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-01 19:46:49,946 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 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 65 [2021-06-01 19:46:49,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:46:49,948 INFO L225 Difference]: With dead ends: 2847 [2021-06-01 19:46:49,948 INFO L226 Difference]: Without dead ends: 1807 [2021-06-01 19:46:49,949 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 5055.8ms TimeCoverageRelationStatistics Valid=1851, Invalid=11259, Unknown=0, NotChecked=0, Total=13110 [2021-06-01 19:46:49,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2021-06-01 19:46:49,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 156. [2021-06-01 19:46:49,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.9741935483870967) internal successors, (306), 155 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:49,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 306 transitions. [2021-06-01 19:46:49,955 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 306 transitions. Word has length 65 [2021-06-01 19:46:49,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:46:49,955 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 306 transitions. [2021-06-01 19:46:49,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 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) [2021-06-01 19:46:49,955 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 306 transitions. [2021-06-01 19:46:49,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-01 19:46:49,956 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:46:49,956 INFO L554 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:46:50,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:46:50,161 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:46:50,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:46:50,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1693335049, now seen corresponding path program 51 times [2021-06-01 19:46:50,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:46:50,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77170020] [2021-06-01 19:46:50,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:46:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:46:50,582 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:50,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:46:50,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77170020] [2021-06-01 19:46:50,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77170020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:50,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893279598] [2021-06-01 19:46:50,583 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 [2021-06-01 19:46:50,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-01 19:46:50,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:46:50,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-01 19:46:50,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:46:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:50,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893279598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:50,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:46:50,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 31 [2021-06-01 19:46:50,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901931239] [2021-06-01 19:46:50,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-01 19:46:50,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:46:50,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-01 19:46:50,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-06-01 19:46:50,803 INFO L87 Difference]: Start difference. First operand 156 states and 306 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:50,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:46:50,903 INFO L93 Difference]: Finished difference Result 1724 states and 3349 transitions. [2021-06-01 19:46:50,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-01 19:46:50,903 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-01 19:46:50,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:46:50,905 INFO L225 Difference]: With dead ends: 1724 [2021-06-01 19:46:50,905 INFO L226 Difference]: Without dead ends: 1665 [2021-06-01 19:46:50,905 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 380.7ms TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-06-01 19:46:50,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2021-06-01 19:46:50,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1491. [2021-06-01 19:46:50,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1491 states, 1490 states have (on average 2.0530201342281877) internal successors, (3059), 1490 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:50,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 3059 transitions. [2021-06-01 19:46:50,924 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 3059 transitions. Word has length 66 [2021-06-01 19:46:50,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:46:50,924 INFO L482 AbstractCegarLoop]: Abstraction has 1491 states and 3059 transitions. [2021-06-01 19:46:50,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:50,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 3059 transitions. [2021-06-01 19:46:50,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-01 19:46:50,926 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:46:50,926 INFO L554 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:46:51,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-01 19:46:51,133 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:46:51,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:46:51,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1238813890, now seen corresponding path program 52 times [2021-06-01 19:46:51,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:46:51,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816856580] [2021-06-01 19:46:51,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:46:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:46:52,899 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:52,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:46:52,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816856580] [2021-06-01 19:46:52,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816856580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:52,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119907464] [2021-06-01 19:46:52,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-01 19:46:52,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 19:46:52,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:46:52,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 119 conjunts are in the unsatisfiable core [2021-06-01 19:46:52,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:46:53,066 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 11 treesize of output 7 [2021-06-01 19:46:53,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:46:53,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:46:53,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:46:53,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:46:53,075 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:53,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119907464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:53,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:46:53,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2021-06-01 19:46:53,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177986685] [2021-06-01 19:46:53,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-06-01 19:46:53,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:46:53,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-06-01 19:46:53,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2021-06-01 19:46:53,076 INFO L87 Difference]: Start difference. First operand 1491 states and 3059 transitions. Second operand has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:58,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:46:58,190 INFO L93 Difference]: Finished difference Result 3035 states and 6001 transitions. [2021-06-01 19:46:58,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-01 19:46:58,191 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-01 19:46:58,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:46:58,192 INFO L225 Difference]: With dead ends: 3035 [2021-06-01 19:46:58,192 INFO L226 Difference]: Without dead ends: 1929 [2021-06-01 19:46:58,193 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 5625.4ms TimeCoverageRelationStatistics Valid=1975, Invalid=12067, Unknown=0, NotChecked=0, Total=14042 [2021-06-01 19:46:58,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2021-06-01 19:46:58,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 161. [2021-06-01 19:46:58,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.975) internal successors, (316), 160 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:58,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 316 transitions. [2021-06-01 19:46:58,198 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 316 transitions. Word has length 67 [2021-06-01 19:46:58,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:46:58,198 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 316 transitions. [2021-06-01 19:46:58,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:58,198 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 316 transitions. [2021-06-01 19:46:58,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-06-01 19:46:58,198 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:46:58,198 INFO L554 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:46:58,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:46:58,399 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:46:58,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:46:58,399 INFO L82 PathProgramCache]: Analyzing trace with hash -228404373, now seen corresponding path program 53 times [2021-06-01 19:46:58,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:46:58,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145748607] [2021-06-01 19:46:58,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:46:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:46:58,830 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:58,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:46:58,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145748607] [2021-06-01 19:46:58,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145748607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:58,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906171455] [2021-06-01 19:46:58,831 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 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 [2021-06-01 19:46:58,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-01 19:46:58,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:46:58,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 60 conjunts are in the unsatisfiable core [2021-06-01 19:46:58,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:46:59,028 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:46:59,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906171455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:46:59,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:46:59,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 32 [2021-06-01 19:46:59,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109302663] [2021-06-01 19:46:59,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 19:46:59,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:46:59,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 19:46:59,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 19:46:59,029 INFO L87 Difference]: Start difference. First operand 161 states and 316 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:59,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:46:59,112 INFO L93 Difference]: Finished difference Result 1828 states and 3554 transitions. [2021-06-01 19:46:59,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-01 19:46:59,112 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-06-01 19:46:59,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:46:59,113 INFO L225 Difference]: With dead ends: 1828 [2021-06-01 19:46:59,113 INFO L226 Difference]: Without dead ends: 1767 [2021-06-01 19:46:59,113 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 383.1ms TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 19:46:59,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-06-01 19:46:59,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1587. [2021-06-01 19:46:59,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 2.051702395964691) internal successors, (3254), 1586 states have internal predecessors, (3254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:59,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 3254 transitions. [2021-06-01 19:46:59,129 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 3254 transitions. Word has length 68 [2021-06-01 19:46:59,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:46:59,129 INFO L482 AbstractCegarLoop]: Abstraction has 1587 states and 3254 transitions. [2021-06-01 19:46:59,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:46:59,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 3254 transitions. [2021-06-01 19:46:59,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-06-01 19:46:59,131 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:46:59,131 INFO L554 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:46:59,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-01 19:46:59,346 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:46:59,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:46:59,346 INFO L82 PathProgramCache]: Analyzing trace with hash 68179830, now seen corresponding path program 54 times [2021-06-01 19:46:59,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:46:59,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785688539] [2021-06-01 19:46:59,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:46:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:47:01,103 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:47:01,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:47:01,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785688539] [2021-06-01 19:47:01,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785688539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:47:01,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966425000] [2021-06-01 19:47:01,103 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 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 [2021-06-01 19:47:01,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-01 19:47:01,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:47:01,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 123 conjunts are in the unsatisfiable core [2021-06-01 19:47:01,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:47:01,279 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 11 treesize of output 7 [2021-06-01 19:47:01,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:47:01,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:47:01,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:47:01,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:47:01,286 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:47:01,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966425000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:47:01,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:47:01,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2021-06-01 19:47:01,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867553503] [2021-06-01 19:47:01,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-06-01 19:47:01,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:47:01,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-06-01 19:47:01,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2021-06-01 19:47:01,287 INFO L87 Difference]: Start difference. First operand 1587 states and 3254 transitions. Second operand has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:06,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:47:06,865 INFO L93 Difference]: Finished difference Result 3229 states and 6387 transitions. [2021-06-01 19:47:06,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-01 19:47:06,866 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-06-01 19:47:06,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:47:06,867 INFO L225 Difference]: With dead ends: 3229 [2021-06-01 19:47:06,867 INFO L226 Difference]: Without dead ends: 2055 [2021-06-01 19:47:06,868 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 6003.7ms TimeCoverageRelationStatistics Valid=2103, Invalid=12903, Unknown=0, NotChecked=0, Total=15006 [2021-06-01 19:47:06,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2021-06-01 19:47:06,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 166. [2021-06-01 19:47:06,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 165 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:06,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 326 transitions. [2021-06-01 19:47:06,873 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 326 transitions. Word has length 69 [2021-06-01 19:47:06,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:47:06,873 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 326 transitions. [2021-06-01 19:47:06,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:06,873 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 326 transitions. [2021-06-01 19:47:06,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-01 19:47:06,874 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:47:06,874 INFO L554 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:47:07,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-01 19:47:07,074 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:47:07,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:47:07,075 INFO L82 PathProgramCache]: Analyzing trace with hash 2136645431, now seen corresponding path program 55 times [2021-06-01 19:47:07,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:47:07,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404046421] [2021-06-01 19:47:07,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:47:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:47:07,537 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:47:07,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:47:07,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404046421] [2021-06-01 19:47:07,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404046421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:47:07,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80987000] [2021-06-01 19:47:07,537 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 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 [2021-06-01 19:47:07,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:47:07,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 62 conjunts are in the unsatisfiable core [2021-06-01 19:47:07,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:47:07,726 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:47:07,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80987000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:47:07,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:47:07,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 33 [2021-06-01 19:47:07,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920282405] [2021-06-01 19:47:07,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-01 19:47:07,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:47:07,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-01 19:47:07,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-06-01 19:47:07,727 INFO L87 Difference]: Start difference. First operand 166 states and 326 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:07,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:47:07,827 INFO L93 Difference]: Finished difference Result 1935 states and 3765 transitions. [2021-06-01 19:47:07,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-01 19:47:07,827 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-01 19:47:07,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:47:07,828 INFO L225 Difference]: With dead ends: 1935 [2021-06-01 19:47:07,828 INFO L226 Difference]: Without dead ends: 1872 [2021-06-01 19:47:07,829 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 417.1ms TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-06-01 19:47:07,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2021-06-01 19:47:07,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1686. [2021-06-01 19:47:07,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 2.050445103857567) internal successors, (3455), 1685 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:07,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 3455 transitions. [2021-06-01 19:47:07,842 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 3455 transitions. Word has length 70 [2021-06-01 19:47:07,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:47:07,842 INFO L482 AbstractCegarLoop]: Abstraction has 1686 states and 3455 transitions. [2021-06-01 19:47:07,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:07,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 3455 transitions. [2021-06-01 19:47:07,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-01 19:47:07,844 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:47:07,844 INFO L554 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:47:08,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:47:08,061 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:47:08,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:47:08,061 INFO L82 PathProgramCache]: Analyzing trace with hash -608744318, now seen corresponding path program 56 times [2021-06-01 19:47:08,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:47:08,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635705788] [2021-06-01 19:47:08,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:47:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:47:09,922 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:47:09,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:47:09,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635705788] [2021-06-01 19:47:09,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635705788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:47:09,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802547017] [2021-06-01 19:47:09,922 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 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 [2021-06-01 19:47:09,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 19:47:09,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:47:09,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 127 conjunts are in the unsatisfiable core [2021-06-01 19:47:09,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:47:10,094 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 11 treesize of output 7 [2021-06-01 19:47:10,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:47:10,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:47:10,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:47:10,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:47:10,101 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:47:10,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802547017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:47:10,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:47:10,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2021-06-01 19:47:10,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633437758] [2021-06-01 19:47:10,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-06-01 19:47:10,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:47:10,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-06-01 19:47:10,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2021-06-01 19:47:10,103 INFO L87 Difference]: Start difference. First operand 1686 states and 3455 transitions. Second operand has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:16,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:47:16,038 INFO L93 Difference]: Finished difference Result 3429 states and 6785 transitions. [2021-06-01 19:47:16,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-01 19:47:16,038 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-01 19:47:16,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:47:16,040 INFO L225 Difference]: With dead ends: 3429 [2021-06-01 19:47:16,040 INFO L226 Difference]: Without dead ends: 2185 [2021-06-01 19:47:16,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 6357.0ms TimeCoverageRelationStatistics Valid=2235, Invalid=13767, Unknown=0, NotChecked=0, Total=16002 [2021-06-01 19:47:16,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2185 states. [2021-06-01 19:47:16,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2185 to 171. [2021-06-01 19:47:16,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.9764705882352942) internal successors, (336), 170 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:16,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 336 transitions. [2021-06-01 19:47:16,046 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 336 transitions. Word has length 71 [2021-06-01 19:47:16,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:47:16,047 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 336 transitions. [2021-06-01 19:47:16,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:16,047 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 336 transitions. [2021-06-01 19:47:16,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-06-01 19:47:16,047 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:47:16,047 INFO L554 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:47:16,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-01 19:47:16,248 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:47:16,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:47:16,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1668133973, now seen corresponding path program 57 times [2021-06-01 19:47:16,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:47:16,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746545202] [2021-06-01 19:47:16,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:47:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:47:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:47:16,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:47:16,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746545202] [2021-06-01 19:47:16,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746545202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:47:16,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052131924] [2021-06-01 19:47:16,731 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 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 [2021-06-01 19:47:16,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-01 19:47:16,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:47:16,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 64 conjunts are in the unsatisfiable core [2021-06-01 19:47:16,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:47:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:47:16,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052131924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:47:16,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:47:16,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 34 [2021-06-01 19:47:16,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614543081] [2021-06-01 19:47:16,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-01 19:47:16,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:47:16,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-01 19:47:16,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-06-01 19:47:16,929 INFO L87 Difference]: Start difference. First operand 171 states and 336 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:17,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:47:17,035 INFO L93 Difference]: Finished difference Result 2045 states and 3982 transitions. [2021-06-01 19:47:17,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-01 19:47:17,036 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-06-01 19:47:17,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:47:17,038 INFO L225 Difference]: With dead ends: 2045 [2021-06-01 19:47:17,038 INFO L226 Difference]: Without dead ends: 1980 [2021-06-01 19:47:17,038 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 437.7ms TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-06-01 19:47:17,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2021-06-01 19:47:17,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1788. [2021-06-01 19:47:17,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1787 states have (on average 2.0492445439283715) internal successors, (3662), 1787 states have internal predecessors, (3662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:17,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 3662 transitions. [2021-06-01 19:47:17,053 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 3662 transitions. Word has length 72 [2021-06-01 19:47:17,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:47:17,053 INFO L482 AbstractCegarLoop]: Abstraction has 1788 states and 3662 transitions. [2021-06-01 19:47:17,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:17,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 3662 transitions. [2021-06-01 19:47:17,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-06-01 19:47:17,055 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:47:17,055 INFO L554 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:47:17,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:47:17,261 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:47:17,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:47:17,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1417204278, now seen corresponding path program 58 times [2021-06-01 19:47:17,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:47:17,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024215908] [2021-06-01 19:47:17,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:47:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:47:19,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:47:19,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:47:19,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024215908] [2021-06-01 19:47:19,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024215908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:47:19,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511428581] [2021-06-01 19:47:19,171 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 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 [2021-06-01 19:47:19,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 19:47:19,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:47:19,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 131 conjunts are in the unsatisfiable core [2021-06-01 19:47:19,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:47:19,346 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 11 treesize of output 7 [2021-06-01 19:47:19,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:47:19,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:47:19,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:47:19,348 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:47:19,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:47:19,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511428581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:47:19,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:47:19,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2021-06-01 19:47:19,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885357893] [2021-06-01 19:47:19,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-06-01 19:47:19,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:47:19,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-06-01 19:47:19,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2021-06-01 19:47:19,355 INFO L87 Difference]: Start difference. First operand 1788 states and 3662 transitions. Second operand has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:25,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:47:25,775 INFO L93 Difference]: Finished difference Result 3635 states and 7195 transitions. [2021-06-01 19:47:25,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-01 19:47:25,775 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-06-01 19:47:25,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:47:25,778 INFO L225 Difference]: With dead ends: 3635 [2021-06-01 19:47:25,778 INFO L226 Difference]: Without dead ends: 2319 [2021-06-01 19:47:25,779 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 6810.4ms TimeCoverageRelationStatistics Valid=2371, Invalid=14659, Unknown=0, NotChecked=0, Total=17030 [2021-06-01 19:47:25,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-06-01 19:47:25,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 176. [2021-06-01 19:47:25,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.977142857142857) internal successors, (346), 175 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:25,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 346 transitions. [2021-06-01 19:47:25,786 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 346 transitions. Word has length 73 [2021-06-01 19:47:25,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:47:25,786 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 346 transitions. [2021-06-01 19:47:25,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:25,786 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 346 transitions. [2021-06-01 19:47:25,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-06-01 19:47:25,787 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:47:25,787 INFO L554 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:47:25,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-01 19:47:25,987 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:47:25,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:47:25,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1006730359, now seen corresponding path program 59 times [2021-06-01 19:47:25,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:47:25,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711300750] [2021-06-01 19:47:25,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:47:25,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:47:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:47:26,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:47:26,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711300750] [2021-06-01 19:47:26,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711300750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:47:26,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991722052] [2021-06-01 19:47:26,479 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 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 [2021-06-01 19:47:26,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-06-01 19:47:26,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:47:26,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-01 19:47:26,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:47:26,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:47:26,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991722052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:47:26,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:47:26,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 35 [2021-06-01 19:47:26,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377941629] [2021-06-01 19:47:26,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-01 19:47:26,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:47:26,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-01 19:47:26,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-06-01 19:47:26,690 INFO L87 Difference]: Start difference. First operand 176 states and 346 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:26,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:47:26,796 INFO L93 Difference]: Finished difference Result 2158 states and 4205 transitions. [2021-06-01 19:47:26,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-01 19:47:26,796 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-06-01 19:47:26,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:47:26,798 INFO L225 Difference]: With dead ends: 2158 [2021-06-01 19:47:26,798 INFO L226 Difference]: Without dead ends: 2091 [2021-06-01 19:47:26,798 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 450.2ms TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-06-01 19:47:26,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-06-01 19:47:26,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1893. [2021-06-01 19:47:26,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 2.0480972515856237) internal successors, (3875), 1892 states have internal predecessors, (3875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:26,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 3875 transitions. [2021-06-01 19:47:26,813 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 3875 transitions. Word has length 74 [2021-06-01 19:47:26,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:47:26,813 INFO L482 AbstractCegarLoop]: Abstraction has 1893 states and 3875 transitions. [2021-06-01 19:47:26,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:26,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 3875 transitions. [2021-06-01 19:47:26,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-01 19:47:26,814 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:47:26,814 INFO L554 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:47:27,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:47:27,015 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:47:27,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:47:27,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1805611966, now seen corresponding path program 60 times [2021-06-01 19:47:27,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:47:27,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236952405] [2021-06-01 19:47:27,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:47:27,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:47:29,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:47:29,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:47:29,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236952405] [2021-06-01 19:47:29,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236952405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:47:29,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139918403] [2021-06-01 19:47:29,034 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 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 [2021-06-01 19:47:29,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-06-01 19:47:29,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:47:29,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 135 conjunts are in the unsatisfiable core [2021-06-01 19:47:29,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:47:29,244 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 11 treesize of output 7 [2021-06-01 19:47:29,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:47:29,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:47:29,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:47:29,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:47:29,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:47:29,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139918403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:47:29,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:47:29,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2021-06-01 19:47:29,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907925558] [2021-06-01 19:47:29,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-06-01 19:47:29,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:47:29,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-06-01 19:47:29,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2021-06-01 19:47:29,252 INFO L87 Difference]: Start difference. First operand 1893 states and 3875 transitions. Second operand has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:36,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:47:36,143 INFO L93 Difference]: Finished difference Result 3847 states and 7617 transitions. [2021-06-01 19:47:36,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-01 19:47:36,144 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-01 19:47:36,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:47:36,146 INFO L225 Difference]: With dead ends: 3847 [2021-06-01 19:47:36,146 INFO L226 Difference]: Without dead ends: 2457 [2021-06-01 19:47:36,147 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 7299.1ms TimeCoverageRelationStatistics Valid=2511, Invalid=15579, Unknown=0, NotChecked=0, Total=18090 [2021-06-01 19:47:36,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-06-01 19:47:36,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 181. [2021-06-01 19:47:36,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.9777777777777779) internal successors, (356), 180 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:36,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 356 transitions. [2021-06-01 19:47:36,154 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 356 transitions. Word has length 75 [2021-06-01 19:47:36,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:47:36,154 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 356 transitions. [2021-06-01 19:47:36,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:36,154 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 356 transitions. [2021-06-01 19:47:36,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-01 19:47:36,155 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:47:36,155 INFO L554 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:47:36,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-01 19:47:36,357 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:47:36,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:47:36,357 INFO L82 PathProgramCache]: Analyzing trace with hash -116325397, now seen corresponding path program 61 times [2021-06-01 19:47:36,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:47:36,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874825929] [2021-06-01 19:47:36,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:47:36,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:47:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:47:37,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:47:37,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874825929] [2021-06-01 19:47:37,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874825929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:47:37,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491428842] [2021-06-01 19:47:37,068 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 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 [2021-06-01 19:47:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:47:37,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 68 conjunts are in the unsatisfiable core [2021-06-01 19:47:37,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:47:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:47:37,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491428842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:47:37,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:47:37,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 36 [2021-06-01 19:47:37,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860746893] [2021-06-01 19:47:37,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-01 19:47:37,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:47:37,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-01 19:47:37,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 19:47:37,296 INFO L87 Difference]: Start difference. First operand 181 states and 356 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:37,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:47:37,404 INFO L93 Difference]: Finished difference Result 2274 states and 4434 transitions. [2021-06-01 19:47:37,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-01 19:47:37,404 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-01 19:47:37,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:47:37,406 INFO L225 Difference]: With dead ends: 2274 [2021-06-01 19:47:37,406 INFO L226 Difference]: Without dead ends: 2205 [2021-06-01 19:47:37,406 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 595.7ms TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 19:47:37,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2021-06-01 19:47:37,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 2001. [2021-06-01 19:47:37,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2001 states, 2000 states have (on average 2.047) internal successors, (4094), 2000 states have internal predecessors, (4094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:37,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 4094 transitions. [2021-06-01 19:47:37,421 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 4094 transitions. Word has length 76 [2021-06-01 19:47:37,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:47:37,421 INFO L482 AbstractCegarLoop]: Abstraction has 2001 states and 4094 transitions. [2021-06-01 19:47:37,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:37,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 4094 transitions. [2021-06-01 19:47:37,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-06-01 19:47:37,422 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:47:37,422 INFO L554 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:47:37,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:47:37,623 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:47:37,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:47:37,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1242870538, now seen corresponding path program 62 times [2021-06-01 19:47:37,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:47:37,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852183833] [2021-06-01 19:47:37,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:47:37,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:47:39,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:47:39,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:47:39,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852183833] [2021-06-01 19:47:39,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852183833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:47:39,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263874469] [2021-06-01 19:47:39,998 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 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 [2021-06-01 19:47:40,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 19:47:40,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:47:40,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 139 conjunts are in the unsatisfiable core [2021-06-01 19:47:40,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:47:40,227 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 11 treesize of output 7 [2021-06-01 19:47:40,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:47:40,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:47:40,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:47:40,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:47:40,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:47:40,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263874469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:47:40,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:47:40,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2021-06-01 19:47:40,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135046821] [2021-06-01 19:47:40,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-06-01 19:47:40,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:47:40,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-06-01 19:47:40,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2021-06-01 19:47:40,235 INFO L87 Difference]: Start difference. First operand 2001 states and 4094 transitions. Second operand has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:47,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:47:47,589 INFO L93 Difference]: Finished difference Result 4065 states and 8051 transitions. [2021-06-01 19:47:47,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-01 19:47:47,589 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-06-01 19:47:47,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:47:47,591 INFO L225 Difference]: With dead ends: 4065 [2021-06-01 19:47:47,592 INFO L226 Difference]: Without dead ends: 2599 [2021-06-01 19:47:47,592 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 7974.7ms TimeCoverageRelationStatistics Valid=2655, Invalid=16527, Unknown=0, NotChecked=0, Total=19182 [2021-06-01 19:47:47,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2599 states. [2021-06-01 19:47:47,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2599 to 186. [2021-06-01 19:47:47,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.9783783783783784) internal successors, (366), 185 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:47,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 366 transitions. [2021-06-01 19:47:47,599 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 366 transitions. Word has length 77 [2021-06-01 19:47:47,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:47:47,599 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 366 transitions. [2021-06-01 19:47:47,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:47,600 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 366 transitions. [2021-06-01 19:47:47,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-06-01 19:47:47,600 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:47:47,600 INFO L554 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:47:47,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-01 19:47:47,823 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:47:47,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:47:47,823 INFO L82 PathProgramCache]: Analyzing trace with hash 148789687, now seen corresponding path program 63 times [2021-06-01 19:47:47,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:47:47,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609477945] [2021-06-01 19:47:47,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:47:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:47:48,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:47:48,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:47:48,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609477945] [2021-06-01 19:47:48,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609477945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:47:48,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108826286] [2021-06-01 19:47:48,394 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 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 [2021-06-01 19:47:48,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-06-01 19:47:48,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:47:48,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 70 conjunts are in the unsatisfiable core [2021-06-01 19:47:48,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:47:48,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:47:48,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108826286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:47:48,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:47:48,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 37 [2021-06-01 19:47:48,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849955687] [2021-06-01 19:47:48,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-01 19:47:48,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:47:48,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-01 19:47:48,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-06-01 19:47:48,632 INFO L87 Difference]: Start difference. First operand 186 states and 366 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:48,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:47:48,754 INFO L93 Difference]: Finished difference Result 2393 states and 4669 transitions. [2021-06-01 19:47:48,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-01 19:47:48,755 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-06-01 19:47:48,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:47:48,756 INFO L225 Difference]: With dead ends: 2393 [2021-06-01 19:47:48,756 INFO L226 Difference]: Without dead ends: 2322 [2021-06-01 19:47:48,757 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 530.2ms TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-06-01 19:47:48,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2021-06-01 19:47:48,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 2112. [2021-06-01 19:47:48,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 2111 states have (on average 2.045949786830886) internal successors, (4319), 2111 states have internal predecessors, (4319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:48,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 4319 transitions. [2021-06-01 19:47:48,775 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 4319 transitions. Word has length 78 [2021-06-01 19:47:48,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:47:48,776 INFO L482 AbstractCegarLoop]: Abstraction has 2112 states and 4319 transitions. [2021-06-01 19:47:48,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:48,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 4319 transitions. [2021-06-01 19:47:48,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-06-01 19:47:48,778 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:47:48,778 INFO L554 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:47:48,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:47:48,999 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:47:48,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:47:48,999 INFO L82 PathProgramCache]: Analyzing trace with hash -129332222, now seen corresponding path program 64 times [2021-06-01 19:47:48,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:47:48,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487889499] [2021-06-01 19:47:48,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:47:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:47:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:47:51,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:47:51,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487889499] [2021-06-01 19:47:51,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487889499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:47:51,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945273946] [2021-06-01 19:47:51,248 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 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 [2021-06-01 19:47:51,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 19:47:51,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:47:51,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 143 conjunts are in the unsatisfiable core [2021-06-01 19:47:51,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:47:51,446 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 11 treesize of output 7 [2021-06-01 19:47:51,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:47:51,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:47:51,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:47:51,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:47:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:47:51,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945273946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:47:51,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:47:51,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2021-06-01 19:47:51,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940868005] [2021-06-01 19:47:51,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-06-01 19:47:51,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:47:51,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-06-01 19:47:51,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2021-06-01 19:47:51,454 INFO L87 Difference]: Start difference. First operand 2112 states and 4319 transitions. Second operand has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:59,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:47:59,277 INFO L93 Difference]: Finished difference Result 4289 states and 8497 transitions. [2021-06-01 19:47:59,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-01 19:47:59,278 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-06-01 19:47:59,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:47:59,280 INFO L225 Difference]: With dead ends: 4289 [2021-06-01 19:47:59,280 INFO L226 Difference]: Without dead ends: 2745 [2021-06-01 19:47:59,281 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 8265.9ms TimeCoverageRelationStatistics Valid=2803, Invalid=17503, Unknown=0, NotChecked=0, Total=20306 [2021-06-01 19:47:59,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2021-06-01 19:47:59,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 191. [2021-06-01 19:47:59,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.9789473684210526) internal successors, (376), 190 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:59,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 376 transitions. [2021-06-01 19:47:59,289 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 376 transitions. Word has length 79 [2021-06-01 19:47:59,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:47:59,289 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 376 transitions. [2021-06-01 19:47:59,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:47:59,289 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 376 transitions. [2021-06-01 19:47:59,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-01 19:47:59,289 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:47:59,289 INFO L554 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:47:59,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-01 19:47:59,490 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:47:59,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:47:59,490 INFO L82 PathProgramCache]: Analyzing trace with hash 308739115, now seen corresponding path program 65 times [2021-06-01 19:47:59,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:47:59,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485266614] [2021-06-01 19:47:59,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:47:59,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:48:00,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:48:00,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:48:00,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485266614] [2021-06-01 19:48:00,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485266614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:48:00,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107623983] [2021-06-01 19:48:00,086 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 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 [2021-06-01 19:48:00,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-06-01 19:48:00,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:48:00,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 72 conjunts are in the unsatisfiable core [2021-06-01 19:48:00,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:48:00,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:48:00,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107623983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:48:00,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:48:00,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 38 [2021-06-01 19:48:00,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070896525] [2021-06-01 19:48:00,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-01 19:48:00,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:48:00,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-01 19:48:00,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-06-01 19:48:00,332 INFO L87 Difference]: Start difference. First operand 191 states and 376 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:48:00,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:48:00,453 INFO L93 Difference]: Finished difference Result 2515 states and 4910 transitions. [2021-06-01 19:48:00,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-01 19:48:00,453 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-01 19:48:00,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:48:00,455 INFO L225 Difference]: With dead ends: 2515 [2021-06-01 19:48:00,455 INFO L226 Difference]: Without dead ends: 2442 [2021-06-01 19:48:00,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 552.0ms TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-06-01 19:48:00,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2021-06-01 19:48:00,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2226. [2021-06-01 19:48:00,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 2225 states have (on average 2.044943820224719) internal successors, (4550), 2225 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:48:00,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 4550 transitions. [2021-06-01 19:48:00,471 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 4550 transitions. Word has length 80 [2021-06-01 19:48:00,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:48:00,471 INFO L482 AbstractCegarLoop]: Abstraction has 2226 states and 4550 transitions. [2021-06-01 19:48:00,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:48:00,471 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 4550 transitions. [2021-06-01 19:48:00,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-06-01 19:48:00,473 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:48:00,473 INFO L554 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:48:00,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-01 19:48:00,673 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:48:00,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:48:00,674 INFO L82 PathProgramCache]: Analyzing trace with hash -678443082, now seen corresponding path program 66 times [2021-06-01 19:48:00,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:48:00,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491426775] [2021-06-01 19:48:00,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:48:00,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:48:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:48:03,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:48:03,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491426775] [2021-06-01 19:48:03,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491426775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:48:03,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688329694] [2021-06-01 19:48:03,043 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 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 [2021-06-01 19:48:03,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-06-01 19:48:03,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:48:03,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 147 conjunts are in the unsatisfiable core [2021-06-01 19:48:03,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:48:03,263 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 11 treesize of output 7 [2021-06-01 19:48:03,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:48:03,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:48:03,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:48:03,266 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:48:03,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:48:03,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688329694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:48:03,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:48:03,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2021-06-01 19:48:03,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126025005] [2021-06-01 19:48:03,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-06-01 19:48:03,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:48:03,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-06-01 19:48:03,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2021-06-01 19:48:03,272 INFO L87 Difference]: Start difference. First operand 2226 states and 4550 transitions. Second operand has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:48:11,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:48:11,661 INFO L93 Difference]: Finished difference Result 4519 states and 8955 transitions. [2021-06-01 19:48:11,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-01 19:48:11,661 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-06-01 19:48:11,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:48:11,665 INFO L225 Difference]: With dead ends: 4519 [2021-06-01 19:48:11,665 INFO L226 Difference]: Without dead ends: 2895 [2021-06-01 19:48:11,666 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 8839.6ms TimeCoverageRelationStatistics Valid=2955, Invalid=18507, Unknown=0, NotChecked=0, Total=21462 [2021-06-01 19:48:11,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2895 states. [2021-06-01 19:48:11,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2895 to 196. [2021-06-01 19:48:11,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 195 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:48:11,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 386 transitions. [2021-06-01 19:48:11,676 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 386 transitions. Word has length 81 [2021-06-01 19:48:11,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:48:11,677 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 386 transitions. [2021-06-01 19:48:11,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:48:11,677 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 386 transitions. [2021-06-01 19:48:11,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-06-01 19:48:11,677 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:48:11,677 INFO L554 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:48:11,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-01 19:48:11,900 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:48:11,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:48:11,900 INFO L82 PathProgramCache]: Analyzing trace with hash 466171639, now seen corresponding path program 67 times [2021-06-01 19:48:11,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:48:11,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535132552] [2021-06-01 19:48:11,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:48:11,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:48:12,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:48:12,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:48:12,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535132552] [2021-06-01 19:48:12,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535132552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:48:12,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646847949] [2021-06-01 19:48:12,507 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 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 [2021-06-01 19:48:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:48:12,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-01 19:48:12,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:48:12,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:48:12,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646847949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:48:12,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:48:12,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 39 [2021-06-01 19:48:12,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379775313] [2021-06-01 19:48:12,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-01 19:48:12,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:48:12,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-01 19:48:12,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-06-01 19:48:12,734 INFO L87 Difference]: Start difference. First operand 196 states and 386 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:48:12,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:48:12,889 INFO L93 Difference]: Finished difference Result 2640 states and 5157 transitions. [2021-06-01 19:48:12,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-01 19:48:12,889 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-06-01 19:48:12,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:48:12,891 INFO L225 Difference]: With dead ends: 2640 [2021-06-01 19:48:12,891 INFO L226 Difference]: Without dead ends: 2565 [2021-06-01 19:48:12,891 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 561.7ms TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-06-01 19:48:12,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2565 states. [2021-06-01 19:48:12,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2565 to 2343. [2021-06-01 19:48:12,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 2.04397950469684) internal successors, (4787), 2342 states have internal predecessors, (4787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:48:12,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 4787 transitions. [2021-06-01 19:48:12,910 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 4787 transitions. Word has length 82 [2021-06-01 19:48:12,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:48:12,910 INFO L482 AbstractCegarLoop]: Abstraction has 2343 states and 4787 transitions. [2021-06-01 19:48:12,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:48:12,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 4787 transitions. [2021-06-01 19:48:12,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-06-01 19:48:12,912 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:48:12,912 INFO L554 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:48:13,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:48:13,113 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:48:13,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:48:13,113 INFO L82 PathProgramCache]: Analyzing trace with hash 971852738, now seen corresponding path program 68 times [2021-06-01 19:48:13,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:48:13,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898777584] [2021-06-01 19:48:13,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:48:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:48:15,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:48:15,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:48:15,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898777584] [2021-06-01 19:48:15,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898777584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:48:15,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985840063] [2021-06-01 19:48:15,641 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 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 [2021-06-01 19:48:15,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 19:48:15,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:48:15,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 151 conjunts are in the unsatisfiable core [2021-06-01 19:48:15,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:48:15,842 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 11 treesize of output 7 [2021-06-01 19:48:15,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:48:15,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:48:15,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:48:15,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:48:15,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:48:15,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985840063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:48:15,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:48:15,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2021-06-01 19:48:15,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260017045] [2021-06-01 19:48:15,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-06-01 19:48:15,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:48:15,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-06-01 19:48:15,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2021-06-01 19:48:15,850 INFO L87 Difference]: Start difference. First operand 2343 states and 4787 transitions. Second operand has 77 states, 77 states have (on average 1.077922077922078) internal successors, (83), 76 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:48:24,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:48:24,807 INFO L93 Difference]: Finished difference Result 4755 states and 9425 transitions. [2021-06-01 19:48:24,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-01 19:48:24,807 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.077922077922078) internal successors, (83), 76 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-06-01 19:48:24,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:48:24,810 INFO L225 Difference]: With dead ends: 4755 [2021-06-01 19:48:24,810 INFO L226 Difference]: Without dead ends: 3049 [2021-06-01 19:48:24,810 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2701 ImplicationChecksByTransitivity, 9459.2ms TimeCoverageRelationStatistics Valid=3111, Invalid=19539, Unknown=0, NotChecked=0, Total=22650 [2021-06-01 19:48:24,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-06-01 19:48:24,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 201. [2021-06-01 19:48:24,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.98) internal successors, (396), 200 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:48:24,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 396 transitions. [2021-06-01 19:48:24,821 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 396 transitions. Word has length 83 [2021-06-01 19:48:24,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:48:24,821 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 396 transitions. [2021-06-01 19:48:24,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 77 states, 77 states have (on average 1.077922077922078) internal successors, (83), 76 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:48:24,822 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 396 transitions. [2021-06-01 19:48:24,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-06-01 19:48:24,822 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:48:24,822 INFO L554 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:48:25,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-01 19:48:25,037 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:48:25,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:48:25,037 INFO L82 PathProgramCache]: Analyzing trace with hash 85734507, now seen corresponding path program 69 times [2021-06-01 19:48:25,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:48:25,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931437058] [2021-06-01 19:48:25,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:48:25,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:48:25,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:48:25,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:48:25,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931437058] [2021-06-01 19:48:25,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931437058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:48:25,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800238349] [2021-06-01 19:48:25,775 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 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 [2021-06-01 19:48:25,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-06-01 19:48:25,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:48:25,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 76 conjunts are in the unsatisfiable core [2021-06-01 19:48:25,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:48:26,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:48:26,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800238349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:48:26,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:48:26,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 40 [2021-06-01 19:48:26,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625819994] [2021-06-01 19:48:26,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-01 19:48:26,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:48:26,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-01 19:48:26,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-06-01 19:48:26,014 INFO L87 Difference]: Start difference. First operand 201 states and 396 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:48:26,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:48:26,147 INFO L93 Difference]: Finished difference Result 2768 states and 5410 transitions. [2021-06-01 19:48:26,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-01 19:48:26,148 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-06-01 19:48:26,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:48:26,150 INFO L225 Difference]: With dead ends: 2768 [2021-06-01 19:48:26,150 INFO L226 Difference]: Without dead ends: 2691 [2021-06-01 19:48:26,150 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 691.7ms TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-06-01 19:48:26,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2021-06-01 19:48:26,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 2463. [2021-06-01 19:48:26,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2462 states have (on average 2.0430544272948823) internal successors, (5030), 2462 states have internal predecessors, (5030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:48:26,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 5030 transitions. [2021-06-01 19:48:26,167 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 5030 transitions. Word has length 84 [2021-06-01 19:48:26,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:48:26,167 INFO L482 AbstractCegarLoop]: Abstraction has 2463 states and 5030 transitions. [2021-06-01 19:48:26,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:48:26,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 5030 transitions. [2021-06-01 19:48:26,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-01 19:48:26,169 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:48:26,169 INFO L554 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:48:26,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:48:26,373 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:48:26,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:48:26,373 INFO L82 PathProgramCache]: Analyzing trace with hash 713966198, now seen corresponding path program 70 times [2021-06-01 19:48:26,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:48:26,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804330317] [2021-06-01 19:48:26,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:48:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:48:29,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:48:29,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:48:29,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804330317] [2021-06-01 19:48:29,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804330317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:48:29,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185820119] [2021-06-01 19:48:29,043 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 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 [2021-06-01 19:48:29,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 19:48:29,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:48:29,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 155 conjunts are in the unsatisfiable core [2021-06-01 19:48:29,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:48:29,272 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 11 treesize of output 7 [2021-06-01 19:48:29,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:48:29,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:48:29,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:48:29,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:48:29,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:48:29,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185820119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:48:29,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:48:29,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2021-06-01 19:48:29,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666021423] [2021-06-01 19:48:29,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-06-01 19:48:29,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:48:29,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-06-01 19:48:29,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2021-06-01 19:48:29,282 INFO L87 Difference]: Start difference. First operand 2463 states and 5030 transitions. Second operand has 79 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 78 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:48:38,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:48:38,811 INFO L93 Difference]: Finished difference Result 4997 states and 9907 transitions. [2021-06-01 19:48:38,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-01 19:48:38,811 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 78 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-01 19:48:38,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:48:38,814 INFO L225 Difference]: With dead ends: 4997 [2021-06-01 19:48:38,814 INFO L226 Difference]: Without dead ends: 3207 [2021-06-01 19:48:38,814 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 10071.8ms TimeCoverageRelationStatistics Valid=3271, Invalid=20599, Unknown=0, NotChecked=0, Total=23870 [2021-06-01 19:48:38,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2021-06-01 19:48:38,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 206. [2021-06-01 19:48:38,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.9804878048780488) internal successors, (406), 205 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:48:38,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 406 transitions. [2021-06-01 19:48:38,822 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 406 transitions. Word has length 85 [2021-06-01 19:48:38,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:48:38,822 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 406 transitions. [2021-06-01 19:48:38,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 79 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 78 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:48:38,822 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 406 transitions. [2021-06-01 19:48:38,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-01 19:48:38,823 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:48:38,823 INFO L554 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:48:39,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-06-01 19:48:39,023 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:48:39,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:48:39,023 INFO L82 PathProgramCache]: Analyzing trace with hash 681186359, now seen corresponding path program 71 times [2021-06-01 19:48:39,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:48:39,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815318576] [2021-06-01 19:48:39,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:48:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:48:39,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:48:39,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:48:39,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815318576] [2021-06-01 19:48:39,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815318576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:48:39,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438113318] [2021-06-01 19:48:39,683 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 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 [2021-06-01 19:48:39,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-06-01 19:48:39,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:48:39,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 78 conjunts are in the unsatisfiable core [2021-06-01 19:48:39,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:48:39,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:48:39,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438113318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:48:39,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:48:39,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 41 [2021-06-01 19:48:39,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163376064] [2021-06-01 19:48:39,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-01 19:48:39,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:48:39,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-01 19:48:39,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-06-01 19:48:39,938 INFO L87 Difference]: Start difference. First operand 206 states and 406 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:48:40,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:48:40,121 INFO L93 Difference]: Finished difference Result 2899 states and 5669 transitions. [2021-06-01 19:48:40,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-01 19:48:40,121 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-06-01 19:48:40,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:48:40,123 INFO L225 Difference]: With dead ends: 2899 [2021-06-01 19:48:40,123 INFO L226 Difference]: Without dead ends: 2820 [2021-06-01 19:48:40,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 616.4ms TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-06-01 19:48:40,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2021-06-01 19:48:40,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 2586. [2021-06-01 19:48:40,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2586 states, 2585 states have (on average 2.042166344294004) internal successors, (5279), 2585 states have internal predecessors, (5279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:48:40,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2586 states to 2586 states and 5279 transitions. [2021-06-01 19:48:40,141 INFO L78 Accepts]: Start accepts. Automaton has 2586 states and 5279 transitions. Word has length 86 [2021-06-01 19:48:40,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:48:40,141 INFO L482 AbstractCegarLoop]: Abstraction has 2586 states and 5279 transitions. [2021-06-01 19:48:40,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:48:40,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2586 states and 5279 transitions. [2021-06-01 19:48:40,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-06-01 19:48:40,143 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:48:40,143 INFO L554 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:48:40,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:48:40,343 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:48:40,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:48:40,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1178547326, now seen corresponding path program 72 times [2021-06-01 19:48:40,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:48:40,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257839141] [2021-06-01 19:48:40,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:48:40,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:48:43,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:48:43,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:48:43,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257839141] [2021-06-01 19:48:43,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257839141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:48:43,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090805675] [2021-06-01 19:48:43,121 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 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 [2021-06-01 19:48:43,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-06-01 19:48:43,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:48:43,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 84 conjunts are in the unsatisfiable core [2021-06-01 19:48:43,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:48:51,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-01 19:48:51,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-01 19:48:51,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:48:51,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:48:51,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:48:51,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-01 19:48:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 741 proven. 819 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:48:51,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090805675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:48:51,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:48:51,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 158 [2021-06-01 19:48:51,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888647946] [2021-06-01 19:48:51,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 159 states [2021-06-01 19:48:51,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:48:51,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2021-06-01 19:48:51,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3318, Invalid=21804, Unknown=0, NotChecked=0, Total=25122 [2021-06-01 19:48:51,228 INFO L87 Difference]: Start difference. First operand 2586 states and 5279 transitions. Second operand has 159 states, 159 states have (on average 1.0628930817610063) internal successors, (169), 158 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:48:55,677 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2021-06-01 19:48:55,949 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 109 [2021-06-01 19:48:56,231 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 113 [2021-06-01 19:48:56,592 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 117 [2021-06-01 19:48:56,891 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 121 [2021-06-01 19:48:57,211 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 125 [2021-06-01 19:48:57,532 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 129 [2021-06-01 19:48:57,852 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 128 [2021-06-01 19:48:58,186 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 137 [2021-06-01 19:48:58,531 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 141 [2021-06-01 19:48:58,888 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 145 [2021-06-01 19:48:59,253 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 149 [2021-06-01 19:48:59,619 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 148 [2021-06-01 19:48:59,997 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 152 [2021-06-01 19:49:00,401 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 156 [2021-06-01 19:49:00,806 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 160 [2021-06-01 19:49:01,102 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-06-01 19:49:01,685 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-01 19:49:02,114 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-01 19:49:02,321 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-06-01 19:49:02,727 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-01 19:49:03,365 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-01 19:49:06,264 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-06-01 19:53:06,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:53:06,132 INFO L93 Difference]: Finished difference Result 43429 states and 85946 transitions. [2021-06-01 19:53:06,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 940 states. [2021-06-01 19:53:06,132 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 1.0628930817610063) internal successors, (169), 158 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-06-01 19:53:06,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:53:06,165 INFO L225 Difference]: With dead ends: 43429 [2021-06-01 19:53:06,165 INFO L226 Difference]: Without dead ends: 35000 [2021-06-01 19:53:06,206 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 1064 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1055 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431709 ImplicationChecksByTransitivity, 245064.0ms TimeCoverageRelationStatistics Valid=188064, Invalid=928128, Unknown=0, NotChecked=0, Total=1116192 [2021-06-01 19:53:06,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35000 states. [2021-06-01 19:53:06,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35000 to 2630. [2021-06-01 19:53:06,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2630 states, 2629 states have (on average 2.0422213769494104) internal successors, (5369), 2629 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:53:06,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 5369 transitions. [2021-06-01 19:53:06,344 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 5369 transitions. Word has length 87 [2021-06-01 19:53:06,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:53:06,344 INFO L482 AbstractCegarLoop]: Abstraction has 2630 states and 5369 transitions. [2021-06-01 19:53:06,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 159 states, 159 states have (on average 1.0628930817610063) internal successors, (169), 158 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:53:06,345 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 5369 transitions. [2021-06-01 19:53:06,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-06-01 19:53:06,346 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:53:06,346 INFO L554 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:53:06,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:53:06,547 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:53:06,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:53:06,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1645133110, now seen corresponding path program 73 times [2021-06-01 19:53:06,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:53:06,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334525815] [2021-06-01 19:53:06,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:53:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:53:09,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:53:09,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:53:09,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334525815] [2021-06-01 19:53:09,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334525815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:53:09,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140408226] [2021-06-01 19:53:09,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-01 19:53:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:53:09,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 163 conjunts are in the unsatisfiable core [2021-06-01 19:53:09,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:53:09,769 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 11 treesize of output 7 [2021-06-01 19:53:09,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:53:09,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:53:09,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:53:09,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:53:09,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:53:09,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140408226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:53:09,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:53:09,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2021-06-01 19:53:09,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532828768] [2021-06-01 19:53:09,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-06-01 19:53:09,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:53:09,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-06-01 19:53:09,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2021-06-01 19:53:09,778 INFO L87 Difference]: Start difference. First operand 2630 states and 5369 transitions. Second operand has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 82 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:53:13,520 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-01 19:53:15,376 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-06-01 19:53:15,579 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-01 19:53:15,777 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-01 19:53:20,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:53:20,719 INFO L93 Difference]: Finished difference Result 5413 states and 10738 transitions. [2021-06-01 19:53:20,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-01 19:53:20,720 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 82 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-06-01 19:53:20,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:53:20,723 INFO L225 Difference]: With dead ends: 5413 [2021-06-01 19:53:20,723 INFO L226 Difference]: Without dead ends: 3533 [2021-06-01 19:53:20,724 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3160 ImplicationChecksByTransitivity, 11595.1ms TimeCoverageRelationStatistics Valid=3603, Invalid=22803, Unknown=0, NotChecked=0, Total=26406 [2021-06-01 19:53:20,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3533 states. [2021-06-01 19:53:20,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3533 to 216. [2021-06-01 19:53:20,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.9813953488372094) internal successors, (426), 215 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:53:20,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 426 transitions. [2021-06-01 19:53:20,733 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 426 transitions. Word has length 89 [2021-06-01 19:53:20,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:53:20,733 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 426 transitions. [2021-06-01 19:53:20,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 82 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:53:20,733 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 426 transitions. [2021-06-01 19:53:20,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-01 19:53:20,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:53:20,733 INFO L554 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:53:20,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:53:20,934 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:53:20,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:53:20,934 INFO L82 PathProgramCache]: Analyzing trace with hash -517410441, now seen corresponding path program 74 times [2021-06-01 19:53:20,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:53:20,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159554448] [2021-06-01 19:53:20,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:53:20,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:53:21,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:53:21,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:53:21,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159554448] [2021-06-01 19:53:21,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159554448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:53:21,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962312683] [2021-06-01 19:53:21,731 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 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 [2021-06-01 19:53:21,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 19:53:21,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:53:21,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 82 conjunts are in the unsatisfiable core [2021-06-01 19:53:21,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:53:21,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:53:21,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962312683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:53:21,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:53:21,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 43 [2021-06-01 19:53:21,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628166922] [2021-06-01 19:53:21,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-01 19:53:21,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:53:21,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-01 19:53:21,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-06-01 19:53:21,976 INFO L87 Difference]: Start difference. First operand 216 states and 426 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:53:22,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:53:22,120 INFO L93 Difference]: Finished difference Result 3170 states and 6205 transitions. [2021-06-01 19:53:22,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-01 19:53:22,120 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-01 19:53:22,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:53:22,122 INFO L225 Difference]: With dead ends: 3170 [2021-06-01 19:53:22,122 INFO L226 Difference]: Without dead ends: 3087 [2021-06-01 19:53:22,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 749.8ms TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-06-01 19:53:22,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3087 states. [2021-06-01 19:53:22,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3087 to 2841. [2021-06-01 19:53:22,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2841 states, 2840 states have (on average 2.040492957746479) internal successors, (5795), 2840 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:53:22,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2841 states to 2841 states and 5795 transitions. [2021-06-01 19:53:22,151 INFO L78 Accepts]: Start accepts. Automaton has 2841 states and 5795 transitions. Word has length 90 [2021-06-01 19:53:22,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:53:22,151 INFO L482 AbstractCegarLoop]: Abstraction has 2841 states and 5795 transitions. [2021-06-01 19:53:22,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:53:22,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2841 states and 5795 transitions. [2021-06-01 19:53:22,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-06-01 19:53:22,154 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:53:22,154 INFO L554 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:53:22,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-01 19:53:22,369 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:53:22,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:53:22,369 INFO L82 PathProgramCache]: Analyzing trace with hash -2042819774, now seen corresponding path program 75 times [2021-06-01 19:53:22,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:53:22,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530171278] [2021-06-01 19:53:22,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:53:22,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:53:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:53:25,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:53:25,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530171278] [2021-06-01 19:53:25,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530171278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:53:25,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001762977] [2021-06-01 19:53:25,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-01 19:53:25,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-06-01 19:53:25,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:53:25,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 167 conjunts are in the unsatisfiable core [2021-06-01 19:53:25,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:53:25,755 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 11 treesize of output 7 [2021-06-01 19:53:25,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:53:25,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:53:25,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:53:25,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:53:25,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:53:25,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001762977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:53:25,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:53:25,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2021-06-01 19:53:25,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457347256] [2021-06-01 19:53:25,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-06-01 19:53:25,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:53:25,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-06-01 19:53:25,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2021-06-01 19:53:25,763 INFO L87 Difference]: Start difference. First operand 2841 states and 5795 transitions. Second operand has 85 states, 85 states have (on average 1.0705882352941176) internal successors, (91), 84 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:53:31,459 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-06-01 19:53:31,669 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-01 19:53:31,881 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-06-01 19:53:32,085 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-06-01 19:53:32,315 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-01 19:53:37,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:53:37,370 INFO L93 Difference]: Finished difference Result 5759 states and 11425 transitions. [2021-06-01 19:53:37,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-01 19:53:37,370 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.0705882352941176) internal successors, (91), 84 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-06-01 19:53:37,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:53:37,373 INFO L225 Difference]: With dead ends: 5759 [2021-06-01 19:53:37,373 INFO L226 Difference]: Without dead ends: 3705 [2021-06-01 19:53:37,374 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 12290.4ms TimeCoverageRelationStatistics Valid=3775, Invalid=23947, Unknown=0, NotChecked=0, Total=27722 [2021-06-01 19:53:37,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3705 states. [2021-06-01 19:53:37,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3705 to 221. [2021-06-01 19:53:37,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.981818181818182) internal successors, (436), 220 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:53:37,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 436 transitions. [2021-06-01 19:53:37,385 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 436 transitions. Word has length 91 [2021-06-01 19:53:37,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:53:37,386 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 436 transitions. [2021-06-01 19:53:37,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 1.0705882352941176) internal successors, (91), 84 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:53:37,386 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 436 transitions. [2021-06-01 19:53:37,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-06-01 19:53:37,386 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:53:37,386 INFO L554 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:53:37,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:53:37,587 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:53:37,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:53:37,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1120167147, now seen corresponding path program 76 times [2021-06-01 19:53:37,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:53:37,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195466401] [2021-06-01 19:53:37,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:53:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:53:38,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:53:38,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:53:38,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195466401] [2021-06-01 19:53:38,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195466401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:53:38,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324544170] [2021-06-01 19:53:38,348 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 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 [2021-06-01 19:53:38,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 19:53:38,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:53:38,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 84 conjunts are in the unsatisfiable core [2021-06-01 19:53:38,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:53:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:53:38,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324544170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:53:38,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:53:38,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 44 [2021-06-01 19:53:38,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885736667] [2021-06-01 19:53:38,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-01 19:53:38,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:53:38,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-01 19:53:38,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-06-01 19:53:38,629 INFO L87 Difference]: Start difference. First operand 221 states and 436 transitions. Second operand has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:53:38,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:53:38,805 INFO L93 Difference]: Finished difference Result 3310 states and 6482 transitions. [2021-06-01 19:53:38,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-01 19:53:38,805 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-06-01 19:53:38,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:53:38,807 INFO L225 Difference]: With dead ends: 3310 [2021-06-01 19:53:38,808 INFO L226 Difference]: Without dead ends: 3225 [2021-06-01 19:53:38,808 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 701.0ms TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-06-01 19:53:38,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3225 states. [2021-06-01 19:53:38,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3225 to 2973. [2021-06-01 19:53:38,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2973 states, 2972 states have (on average 2.0397039030955586) internal successors, (6062), 2972 states have internal predecessors, (6062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:53:38,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 6062 transitions. [2021-06-01 19:53:38,828 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 6062 transitions. Word has length 92 [2021-06-01 19:53:38,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:53:38,828 INFO L482 AbstractCegarLoop]: Abstraction has 2973 states and 6062 transitions. [2021-06-01 19:53:38,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:53:38,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 6062 transitions. [2021-06-01 19:53:38,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-06-01 19:53:38,830 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:53:38,830 INFO L554 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:53:39,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:53:39,030 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:53:39,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:53:39,031 INFO L82 PathProgramCache]: Analyzing trace with hash -214353930, now seen corresponding path program 77 times [2021-06-01 19:53:39,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:53:39,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002046988] [2021-06-01 19:53:39,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:53:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:53:42,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:53:42,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:53:42,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002046988] [2021-06-01 19:53:42,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002046988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:53:42,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681099616] [2021-06-01 19:53:42,324 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-01 19:53:42,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-06-01 19:53:42,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:53:42,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 171 conjunts are in the unsatisfiable core [2021-06-01 19:53:42,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:53:42,594 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 11 treesize of output 7 [2021-06-01 19:53:42,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:53:42,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:53:42,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:53:42,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:53:42,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:53:42,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681099616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:53:42,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:53:42,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2021-06-01 19:53:42,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329177256] [2021-06-01 19:53:42,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-06-01 19:53:42,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:53:42,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-06-01 19:53:42,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2021-06-01 19:53:42,603 INFO L87 Difference]: Start difference. First operand 2973 states and 6062 transitions. Second operand has 87 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 86 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:53:45,611 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-01 19:53:48,377 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-06-01 19:53:48,591 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-01 19:53:48,807 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-06-01 19:53:49,027 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-06-01 19:53:49,241 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-06-01 19:53:49,480 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-06-01 19:53:49,642 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-01 19:53:54,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:53:54,810 INFO L93 Difference]: Finished difference Result 6025 states and 11955 transitions. [2021-06-01 19:53:54,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-01 19:53:54,811 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 86 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-06-01 19:53:54,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:53:54,814 INFO L225 Difference]: With dead ends: 6025 [2021-06-01 19:53:54,814 INFO L226 Difference]: Without dead ends: 3879 [2021-06-01 19:53:54,815 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3486 ImplicationChecksByTransitivity, 12914.9ms TimeCoverageRelationStatistics Valid=3951, Invalid=25119, Unknown=0, NotChecked=0, Total=29070 [2021-06-01 19:53:54,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3879 states. [2021-06-01 19:53:54,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3879 to 226. [2021-06-01 19:53:54,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.9822222222222223) internal successors, (446), 225 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:53:54,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 446 transitions. [2021-06-01 19:53:54,824 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 446 transitions. Word has length 93 [2021-06-01 19:53:54,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:53:54,824 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 446 transitions. [2021-06-01 19:53:54,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 87 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 86 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:53:54,824 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 446 transitions. [2021-06-01 19:53:54,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-06-01 19:53:54,824 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:53:54,824 INFO L554 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:53:55,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-01 19:53:55,025 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:53:55,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:53:55,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1968033463, now seen corresponding path program 78 times [2021-06-01 19:53:55,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:53:55,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970274631] [2021-06-01 19:53:55,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:53:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:53:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:53:55,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:53:55,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970274631] [2021-06-01 19:53:55,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970274631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:53:55,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112102974] [2021-06-01 19:53:55,806 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:53:55,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-06-01 19:53:55,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:53:55,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 86 conjunts are in the unsatisfiable core [2021-06-01 19:53:55,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:53:56,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:53:56,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112102974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:53:56,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:53:56,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 45 [2021-06-01 19:53:56,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806406772] [2021-06-01 19:53:56,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-01 19:53:56,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:53:56,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-01 19:53:56,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-06-01 19:53:56,090 INFO L87 Difference]: Start difference. First operand 226 states and 446 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:53:56,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:53:56,252 INFO L93 Difference]: Finished difference Result 3453 states and 6765 transitions. [2021-06-01 19:53:56,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-01 19:53:56,253 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-06-01 19:53:56,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:53:56,255 INFO L225 Difference]: With dead ends: 3453 [2021-06-01 19:53:56,255 INFO L226 Difference]: Without dead ends: 3366 [2021-06-01 19:53:56,255 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 726.6ms TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-06-01 19:53:56,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3366 states. [2021-06-01 19:53:56,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3366 to 3108. [2021-06-01 19:53:56,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 3107 states have (on average 2.0389443192790475) internal successors, (6335), 3107 states have internal predecessors, (6335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:53:56,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 6335 transitions. [2021-06-01 19:53:56,276 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 6335 transitions. Word has length 94 [2021-06-01 19:53:56,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:53:56,276 INFO L482 AbstractCegarLoop]: Abstraction has 3108 states and 6335 transitions. [2021-06-01 19:53:56,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:53:56,277 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 6335 transitions. [2021-06-01 19:53:56,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-01 19:53:56,278 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:53:56,278 INFO L554 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:53:56,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-01 19:53:56,479 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:53:56,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:53:56,479 INFO L82 PathProgramCache]: Analyzing trace with hash -606467326, now seen corresponding path program 79 times [2021-06-01 19:53:56,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:53:56,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789817920] [2021-06-01 19:53:56,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:53:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:53:59,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:53:59,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:53:59,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789817920] [2021-06-01 19:53:59,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789817920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:53:59,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786164405] [2021-06-01 19:53:59,880 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 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 [2021-06-01 19:53:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:53:59,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 175 conjunts are in the unsatisfiable core [2021-06-01 19:53:59,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:54:00,106 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 11 treesize of output 7 [2021-06-01 19:54:00,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:54:00,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:54:00,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:54:00,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-01 19:54:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:54:00,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786164405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:54:00,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:54:00,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2021-06-01 19:54:00,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046150436] [2021-06-01 19:54:00,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-06-01 19:54:00,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:54:00,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-06-01 19:54:00,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2021-06-01 19:54:00,116 INFO L87 Difference]: Start difference. First operand 3108 states and 6335 transitions. Second operand has 89 states, 89 states have (on average 1.0674157303370786) internal successors, (95), 88 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:54:06,029 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-06-01 19:54:06,245 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-01 19:54:06,464 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-06-01 19:54:06,684 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-06-01 19:54:06,911 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-06-01 19:54:07,133 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2021-06-01 19:54:07,380 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-06-01 19:54:07,550 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-06-01 19:54:07,717 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-01 19:54:12,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:54:12,950 INFO L93 Difference]: Finished difference Result 6297 states and 12497 transitions. [2021-06-01 19:54:12,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-01 19:54:12,951 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.0674157303370786) internal successors, (95), 88 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-01 19:54:12,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:54:12,954 INFO L225 Difference]: With dead ends: 6297 [2021-06-01 19:54:12,954 INFO L226 Difference]: Without dead ends: 4057 [2021-06-01 19:54:12,955 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3655 ImplicationChecksByTransitivity, 13477.6ms TimeCoverageRelationStatistics Valid=4131, Invalid=26319, Unknown=0, NotChecked=0, Total=30450 [2021-06-01 19:54:12,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4057 states. [2021-06-01 19:54:12,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4057 to 231. [2021-06-01 19:54:12,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.982608695652174) internal successors, (456), 230 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:54:12,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 456 transitions. [2021-06-01 19:54:12,964 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 456 transitions. Word has length 95 [2021-06-01 19:54:12,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:54:12,964 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 456 transitions. [2021-06-01 19:54:12,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 89 states, 89 states have (on average 1.0674157303370786) internal successors, (95), 88 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:54:12,964 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 456 transitions. [2021-06-01 19:54:12,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-01 19:54:12,965 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:54:12,965 INFO L554 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:54:13,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:54:13,165 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:54:13,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:54:13,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1597547221, now seen corresponding path program 80 times [2021-06-01 19:54:13,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:54:13,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192319878] [2021-06-01 19:54:13,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:54:13,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:54:13,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:54:13,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:54:13,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192319878] [2021-06-01 19:54:13,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192319878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:54:13,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077168026] [2021-06-01 19:54:13,995 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 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 [2021-06-01 19:54:14,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 19:54:14,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:54:14,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 88 conjunts are in the unsatisfiable core [2021-06-01 19:54:14,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:54:14,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:54:14,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077168026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:54:14,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:54:14,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 46 [2021-06-01 19:54:14,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532424225] [2021-06-01 19:54:14,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-01 19:54:14,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:54:14,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-01 19:54:14,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-06-01 19:54:14,236 INFO L87 Difference]: Start difference. First operand 231 states and 456 transitions. Second operand has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:54:14,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 19:54:14,418 INFO L93 Difference]: Finished difference Result 3599 states and 7054 transitions. [2021-06-01 19:54:14,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-01 19:54:14,418 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-01 19:54:14,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 19:54:14,421 INFO L225 Difference]: With dead ends: 3599 [2021-06-01 19:54:14,421 INFO L226 Difference]: Without dead ends: 3510 [2021-06-01 19:54:14,422 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 776.5ms TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-06-01 19:54:14,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3510 states. [2021-06-01 19:54:14,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3510 to 3246. [2021-06-01 19:54:14,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3246 states, 3245 states have (on average 2.0382126348228042) internal successors, (6614), 3245 states have internal predecessors, (6614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:54:14,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3246 states to 3246 states and 6614 transitions. [2021-06-01 19:54:14,447 INFO L78 Accepts]: Start accepts. Automaton has 3246 states and 6614 transitions. Word has length 96 [2021-06-01 19:54:14,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 19:54:14,447 INFO L482 AbstractCegarLoop]: Abstraction has 3246 states and 6614 transitions. [2021-06-01 19:54:14,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:54:14,447 INFO L276 IsEmpty]: Start isEmpty. Operand 3246 states and 6614 transitions. [2021-06-01 19:54:14,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-06-01 19:54:14,449 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 19:54:14,449 INFO L554 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 19:54:14,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:54:14,650 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 19:54:14,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 19:54:14,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1791642954, now seen corresponding path program 81 times [2021-06-01 19:54:14,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 19:54:14,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841970413] [2021-06-01 19:54:14,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 19:54:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 19:54:18,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:54:18,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 19:54:18,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841970413] [2021-06-01 19:54:18,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841970413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:54:18,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715697867] [2021-06-01 19:54:18,128 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 [2021-06-01 19:54:18,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-06-01 19:54:18,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 19:54:18,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 94 conjunts are in the unsatisfiable core [2021-06-01 19:54:18,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 19:54:28,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-01 19:54:28,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-01 19:54:28,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-01 19:54:28,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-01 19:54:28,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-01 19:54:28,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-01 19:54:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 946 proven. 1034 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 19:54:28,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715697867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 19:54:28,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 19:54:28,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 178 [2021-06-01 19:54:28,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302535259] [2021-06-01 19:54:28,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 179 states [2021-06-01 19:54:28,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 19:54:28,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2021-06-01 19:54:28,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4183, Invalid=27679, Unknown=0, NotChecked=0, Total=31862 [2021-06-01 19:54:28,501 INFO L87 Difference]: Start difference. First operand 3246 states and 6614 transitions. Second operand has 179 states, 179 states have (on average 1.0558659217877095) internal successors, (189), 178 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 19:54:32,926 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2021-06-01 19:54:33,192 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 109 [2021-06-01 19:54:33,462 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 113 [2021-06-01 19:54:33,742 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 112 [2021-06-01 19:54:34,030 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 121 [2021-06-01 19:54:34,328 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 120 [2021-06-01 19:54:34,633 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 129 [2021-06-01 19:54:34,952 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 128 [2021-06-01 19:54:35,274 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 137 [2021-06-01 19:54:35,615 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 141 [2021-06-01 19:54:35,960 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 145 [2021-06-01 19:54:36,316 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 144 [2021-06-01 19:54:36,688 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 148 [2021-06-01 19:54:37,073 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 157 [2021-06-01 19:54:37,453 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 156 [2021-06-01 19:54:37,845 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 160 [2021-06-01 19:54:38,243 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 164 [2021-06-01 19:54:38,665 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 173 [2021-06-01 19:54:39,099 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 177 [2021-06-01 19:54:39,532 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 176 [2021-06-01 19:54:39,975 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 180 [2021-06-01 19:54:40,302 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2021-06-01 19:54:40,617 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2021-06-01 19:54:40,940 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2021-06-01 19:54:41,190 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2021-06-01 19:54:41,466 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2021-06-01 19:54:41,718 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2021-06-01 19:54:41,958 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-06-01 19:54:42,221 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2021-06-01 19:54:42,482 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-06-01 19:54:42,721 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-06-01 19:54:42,983 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2021-06-01 19:54:43,237 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2021-06-01 19:54:43,494 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-06-01 19:54:43,732 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-01 19:54:43,992 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2021-06-01 19:54:44,240 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2021-06-01 19:54:44,492 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-06-01 19:54:44,992 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2021-06-01 19:54:45,261 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2021-06-01 19:54:45,502 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-06-01 19:54:45,743 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-01 19:54:46,248 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2021-06-01 19:54:46,501 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-06-01 19:54:46,738 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-01 19:54:46,974 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-06-01 19:54:47,480 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2021-06-01 19:54:47,737 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-06-01 19:54:47,983 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-01 19:54:48,213 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-01 19:54:48,964 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-06-01 19:54:49,217 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-01 19:54:49,473 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-01 19:54:50,438 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-06-01 19:54:50,704 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-01 19:54:50,952 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-01 19:54:52,137 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-01 19:54:52,396 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-01 19:54:53,864 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-01 19:54:54,135 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-01 19:54:55,779 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-01 19:54:57,658 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-01 19:55:24,014 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-01 19:55:37,085 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 130 Received shutdown request... [2021-06-01 19:57:17,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 697 states. [2021-06-01 19:57:18,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 19:57:18,157 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-01 19:57:18,159 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-01 19:57:18,161 WARN L196 ceAbstractionStarter]: Timeout [2021-06-01 19:57:18,161 INFO L202 PluginConnector]: Adding new model simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.06 07:57:18 BasicIcfg [2021-06-01 19:57:18,161 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-01 19:57:18,162 INFO L168 Benchmark]: Toolchain (without parser) took 762769.15 ms. Allocated memory was 327.2 MB in the beginning and 1.7 GB in the end (delta: 1.4 GB). Free memory was 307.0 MB in the beginning and 674.3 MB in the end (delta: -367.3 MB). Peak memory consumption was 1.0 GB. Max. memory is 16.0 GB. [2021-06-01 19:57:18,162 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.32 ms. Allocated memory is still 327.2 MB. Free memory is still 308.1 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-01 19:57:18,162 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.21 ms. Allocated memory is still 327.2 MB. Free memory was 306.9 MB in the beginning and 305.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-01 19:57:18,162 INFO L168 Benchmark]: Boogie Preprocessor took 15.45 ms. Allocated memory is still 327.2 MB. Free memory was 305.4 MB in the beginning and 304.5 MB in the end (delta: 895.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-01 19:57:18,162 INFO L168 Benchmark]: RCFGBuilder took 223.26 ms. Allocated memory is still 327.2 MB. Free memory was 304.5 MB in the beginning and 293.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-01 19:57:18,162 INFO L168 Benchmark]: TraceAbstraction took 762499.66 ms. Allocated memory was 327.2 MB in the beginning and 1.7 GB in the end (delta: 1.4 GB). Free memory was 293.1 MB in the beginning and 674.3 MB in the end (delta: -381.2 MB). Peak memory consumption was 1.0 GB. Max. memory is 16.0 GB. [2021-06-01 19:57:18,162 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 0.32 ms. Allocated memory is still 327.2 MB. Free memory is still 308.1 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.21 ms. Allocated memory is still 327.2 MB. Free memory was 306.9 MB in the beginning and 305.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.45 ms. Allocated memory is still 327.2 MB. Free memory was 305.4 MB in the beginning and 304.5 MB in the end (delta: 895.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 223.26 ms. Allocated memory is still 327.2 MB. Free memory was 304.5 MB in the beginning and 293.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 762499.66 ms. Allocated memory was 327.2 MB in the beginning and 1.7 GB in the end (delta: 1.4 GB). Free memory was 293.1 MB in the beginning and 674.3 MB in the end (delta: -381.2 MB). Peak memory consumption was 1.0 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (3246states) and FLOYD_HOARE automaton (currently 697 states, 179 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 872 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 762405.6ms, OverallIterations: 83, TraceHistogramMax: 44, EmptinessCheckTime: 90.4ms, AutomataDifference: 634829.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9408 SDtfs, 129844 SDslu, 339525 SDs, 0 SdLazy, 95977 SolverSat, 41280 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 47490.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12131 GetRequests, 4909 SyntacticMatches, 72 SemanticMatches, 7149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822443 ImplicationChecksByTransitivity, 648887.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3246occurred in iteration=82, InterpolantAutomatonStates: 4418, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 913.9ms AutomataMinimizationTime, 82 MinimizatonAttempts, 99360 StatesRemovedByMinimization, 79 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 562.3ms SsaConstructionTime, 2917.5ms SatisfiabilityAnalysisTime, 104172.2ms InterpolantComputationTime, 8911 NumberOfCodeBlocks, 8911 NumberOfCodeBlocksAsserted, 659 NumberOfCheckSat, 8747 ConstructedInterpolants, 154 QuantifiedInterpolants, 56579 SizeOfPredicates, 51 NumberOfNonLiveVariables, 18527 ConjunctsInSsa, 5607 ConjunctsInUnsatCore, 164 InterpolantComputations, 2 PerfectInterpolantSequences, 29773/114327 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