/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 19:41:54,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 19:41:54,928 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 19:41:54,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-12 19:41:54,961 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-12 19:41:54,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-12 19:41:54,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-12 19:41:54,964 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-12 19:41:54,965 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-12 19:41:54,972 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-12 19:41:54,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-12 19:41:54,973 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-08-12 19:41:54,997 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-12 19:41:54,998 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-12 19:41:54,998 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-12 19:41:54,999 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 [2021-08-12 19:41:55,071 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 19:41:55,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 19:41:55,072 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 19:41:55,072 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 19:41:55,074 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 19:41:55,074 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 19:41:55,074 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 19:41:55,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 19:41:55,075 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 19:41:55,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 19:41:55,075 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 19:41:55,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 19:41:55,076 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 19:41:55,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 19:41:55,076 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 19:41:55,076 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 19:41:55,076 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 19:41:55,076 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 19:41:55,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 19:41:55,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 19:41:55,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 19:41:55,076 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 19:41:55,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 19:41:55,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 19:41:55,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 19:41:55,077 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 19:41:55,077 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 19:41:55,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 19:41:55,077 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 19:41:55,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 19:41:55,077 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 19:41:55,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 19:41:55,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 19:41:55,316 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 19:41:55,317 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 19:41:55,318 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 19:41:55,319 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl [2021-08-12 19:41:55,326 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl' [2021-08-12 19:41:55,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 19:41:55,353 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 19:41:55,354 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 19:41:55,354 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 19:41:55,354 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 19:41:55,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:41:55" (1/1) ... [2021-08-12 19:41:55,370 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:41:55" (1/1) ... [2021-08-12 19:41:55,375 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 19:41:55,376 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 19:41:55,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 19:41:55,377 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 19:41:55,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:41:55" (1/1) ... [2021-08-12 19:41:55,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:41:55" (1/1) ... [2021-08-12 19:41:55,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:41:55" (1/1) ... [2021-08-12 19:41:55,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:41:55" (1/1) ... [2021-08-12 19:41:55,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:41:55" (1/1) ... [2021-08-12 19:41:55,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:41:55" (1/1) ... [2021-08-12 19:41:55,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:41:55" (1/1) ... [2021-08-12 19:41:55,394 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 19:41:55,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 19:41:55,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 19:41:55,394 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 19:41:55,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:41:55" (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 [2021-08-12 19:41:55,455 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-12 19:41:55,455 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-12 19:41:55,455 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-12 19:41:55,455 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-12 19:41:55,456 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-12 19:41:55,456 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-12 19:41:55,456 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 19:41:55,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 19:41:55,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 19:41:55,456 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-12 19:41:55,456 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-12 19:41:55,456 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-12 19:41:55,456 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-12 19:41:55,457 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-12 19:41:55,457 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-12 19:41:55,457 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 19:41:55,651 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 19:41:55,651 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-12 19:41:55,652 INFO L202 PluginConnector]: Adding new model buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:41:55 BoogieIcfgContainer [2021-08-12 19:41:55,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 19:41:55,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 19:41:55,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 19:41:55,673 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 19:41:55,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:41:55" (1/2) ... [2021-08-12 19:41:55,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23f7527e and model type buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 07:41:55, skipping insertion in model container [2021-08-12 19:41:55,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:41:55" (2/2) ... [2021-08-12 19:41:55,676 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-mult-alt.wvr.bpl [2021-08-12 19:41:55,679 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 19:41:55,679 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 19:41:55,680 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 19:41:55,711 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-08-12 19:41:55,724 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-12 19:41:55,737 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 19:41:55,737 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 19:41:55,738 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 19:41:55,738 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 19:41:55,738 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 19:41:55,738 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 19:41:55,738 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 19:41:55,738 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 19:41:55,765 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-08-12 19:41:55,877 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:41:55,883 INFO L276 IsEmpty]: Start isEmpty. Operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:41:55,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:41:55,902 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:41:55,903 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:41:55,903 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:41:55,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:41:55,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1014933584, now seen corresponding path program 1 times [2021-08-12 19:41:55,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:41:55,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89508225] [2021-08-12 19:41:55,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:41:55,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:41:56,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:41:56,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:41:56,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89508225] [2021-08-12 19:41:56,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89508225] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:41:56,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:41:56,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-12 19:41:56,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921144689] [2021-08-12 19:41:56,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:41:56,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:41:56,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:41:56,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:41:56,056 INFO L87 Difference]: Start difference. First operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 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 6.333333333333333) internal successors, (19), 2 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) [2021-08-12 19:41:56,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:41:56,153 INFO L93 Difference]: Finished difference Result 1158 states and 4449 transitions. [2021-08-12 19:41:56,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:41:56,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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 [2021-08-12 19:41:56,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:41:56,171 INFO L225 Difference]: With dead ends: 1158 [2021-08-12 19:41:56,171 INFO L226 Difference]: Without dead ends: 691 [2021-08-12 19:41:56,174 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:41:56,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-08-12 19:41:56,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 691. [2021-08-12 19:41:56,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 690 states have (on average 3.815942028985507) internal successors, (2633), 690 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:41:56,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 2633 transitions. [2021-08-12 19:41:56,288 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 2633 transitions. Word has length 19 [2021-08-12 19:41:56,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:41:56,288 INFO L482 AbstractCegarLoop]: Abstraction has 691 states and 2633 transitions. [2021-08-12 19:41:56,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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) [2021-08-12 19:41:56,288 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 2633 transitions. [2021-08-12 19:41:56,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 19:41:56,291 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:41:56,292 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:41:56,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 19:41:56,293 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:41:56,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:41:56,298 INFO L82 PathProgramCache]: Analyzing trace with hash 810519764, now seen corresponding path program 1 times [2021-08-12 19:41:56,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:41:56,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106807503] [2021-08-12 19:41:56,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:41:56,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:41:56,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:41:56,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:41:56,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106807503] [2021-08-12 19:41:56,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106807503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:41:56,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141352656] [2021-08-12 19:41:56,347 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 [2021-08-12 19:41:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:41:56,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-12 19:41:56,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:41:56,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:41:56,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141352656] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:41:56,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-12 19:41:56,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-08-12 19:41:56,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6099363] [2021-08-12 19:41:56,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:41:56,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:41:56,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:41:56,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:41:56,491 INFO L87 Difference]: Start difference. First operand 691 states and 2633 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:41:56,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:41:56,566 INFO L93 Difference]: Finished difference Result 1555 states and 5850 transitions. [2021-08-12 19:41:56,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:41:56,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-08-12 19:41:56,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:41:56,575 INFO L225 Difference]: With dead ends: 1555 [2021-08-12 19:41:56,575 INFO L226 Difference]: Without dead ends: 1250 [2021-08-12 19:41:56,578 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:41:56,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-08-12 19:41:56,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 815. [2021-08-12 19:41:56,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 3.839066339066339) internal successors, (3125), 814 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:41:56,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 3125 transitions. [2021-08-12 19:41:56,634 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 3125 transitions. Word has length 22 [2021-08-12 19:41:56,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:41:56,635 INFO L482 AbstractCegarLoop]: Abstraction has 815 states and 3125 transitions. [2021-08-12 19:41:56,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:41:56,636 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 3125 transitions. [2021-08-12 19:41:56,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:41:56,638 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:41:56,638 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:41:56,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-08-12 19:41:56,855 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:41:56,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:41:56,856 INFO L82 PathProgramCache]: Analyzing trace with hash 234896854, now seen corresponding path program 1 times [2021-08-12 19:41:56,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:41:56,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755327272] [2021-08-12 19:41:56,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:41:56,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:41:56,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:41:56,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:41:56,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755327272] [2021-08-12 19:41:56,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755327272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:41:56,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18462250] [2021-08-12 19:41:56,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:41:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:41:57,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:41:57,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:41:57,127 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 [2021-08-12 19:41:57,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:41:57,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:41:57,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:41:57,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-08-12 19:41:57,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:41:57,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18462250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:41:57,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:41:57,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-08-12 19:41:57,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420867245] [2021-08-12 19:41:57,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:41:57,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:41:57,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:41:57,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:41:57,159 INFO L87 Difference]: Start difference. First operand 815 states and 3125 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-08-12 19:41:57,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:41:57,314 INFO L93 Difference]: Finished difference Result 2711 states and 10527 transitions. [2021-08-12 19:41:57,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:41:57,314 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:41:57,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:41:57,326 INFO L225 Difference]: With dead ends: 2711 [2021-08-12 19:41:57,326 INFO L226 Difference]: Without dead ends: 1807 [2021-08-12 19:41:57,328 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:41:57,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2021-08-12 19:41:57,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1306. [2021-08-12 19:41:57,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.8521072796934868) internal successors, (5027), 1305 states have internal predecessors, (5027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:41:57,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 5027 transitions. [2021-08-12 19:41:57,397 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 5027 transitions. Word has length 24 [2021-08-12 19:41:57,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:41:57,398 INFO L482 AbstractCegarLoop]: Abstraction has 1306 states and 5027 transitions. [2021-08-12 19:41:57,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-08-12 19:41:57,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 5027 transitions. [2021-08-12 19:41:57,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:41:57,401 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:41:57,402 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:41:57,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:41:57,608 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:41:57,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:41:57,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1112061528, now seen corresponding path program 2 times [2021-08-12 19:41:57,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:41:57,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76068475] [2021-08-12 19:41:57,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:41:57,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:41:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:41:57,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:41:57,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76068475] [2021-08-12 19:41:57,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76068475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:41:57,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298482721] [2021-08-12 19:41:57,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:41:57,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:41:57,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:41:57,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-12 19:41:57,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:41:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:41:57,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298482721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:41:57,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:41:57,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-08-12 19:41:57,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893532274] [2021-08-12 19:41:57,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:41:57,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:41:57,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:41:57,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:41:57,747 INFO L87 Difference]: Start difference. First operand 1306 states and 5027 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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) [2021-08-12 19:41:57,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:41:57,888 INFO L93 Difference]: Finished difference Result 3284 states and 12773 transitions. [2021-08-12 19:41:57,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:41:57,888 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 26 [2021-08-12 19:41:57,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:41:57,902 INFO L225 Difference]: With dead ends: 3284 [2021-08-12 19:41:57,902 INFO L226 Difference]: Without dead ends: 2234 [2021-08-12 19:41:57,905 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:41:57,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2021-08-12 19:41:57,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 1906. [2021-08-12 19:41:57,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 3.859317585301837) internal successors, (7352), 1905 states have internal predecessors, (7352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:41:58,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 7352 transitions. [2021-08-12 19:41:58,008 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 7352 transitions. Word has length 26 [2021-08-12 19:41:58,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:41:58,008 INFO L482 AbstractCegarLoop]: Abstraction has 1906 states and 7352 transitions. [2021-08-12 19:41:58,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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) [2021-08-12 19:41:58,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 7352 transitions. [2021-08-12 19:41:58,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 19:41:58,015 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:41:58,015 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:41:58,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:41:58,235 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:41:58,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:41:58,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1469512084, now seen corresponding path program 1 times [2021-08-12 19:41:58,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:41:58,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741403248] [2021-08-12 19:41:58,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:41:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:41:58,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:41:58,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:41:58,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741403248] [2021-08-12 19:41:58,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741403248] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:41:58,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:41:58,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:41:58,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315731503] [2021-08-12 19:41:58,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:41:58,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:41:58,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:41:58,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:41:58,272 INFO L87 Difference]: Start difference. First operand 1906 states and 7352 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:41:58,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:41:58,471 INFO L93 Difference]: Finished difference Result 4639 states and 17804 transitions. [2021-08-12 19:41:58,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:41:58,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 19:41:58,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:41:58,492 INFO L225 Difference]: With dead ends: 4639 [2021-08-12 19:41:58,492 INFO L226 Difference]: Without dead ends: 3255 [2021-08-12 19:41:58,495 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:41:58,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2021-08-12 19:41:58,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 2791. [2021-08-12 19:41:58,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.8562724014336918) internal successors, (10759), 2790 states have internal predecessors, (10759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:41:58,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 10759 transitions. [2021-08-12 19:41:58,603 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 10759 transitions. Word has length 26 [2021-08-12 19:41:58,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:41:58,604 INFO L482 AbstractCegarLoop]: Abstraction has 2791 states and 10759 transitions. [2021-08-12 19:41:58,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:41:58,604 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 10759 transitions. [2021-08-12 19:41:58,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:41:58,613 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:41:58,613 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:41:58,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-12 19:41:58,614 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:41:58,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:41:58,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1414582092, now seen corresponding path program 3 times [2021-08-12 19:41:58,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:41:58,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254157188] [2021-08-12 19:41:58,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:41:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:41:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:41:58,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:41:58,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254157188] [2021-08-12 19:41:58,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254157188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:41:58,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704367089] [2021-08-12 19:41:58,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:41:58,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:41:58,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:41:58,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 19:41:58,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:41:58,887 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-12 19:41:58,887 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2021-08-12 19:41:58,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:41:58,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:41:58,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:41:58,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:3 [2021-08-12 19:41:58,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:41:58,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704367089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:41:58,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:41:58,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-12 19:41:58,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476119475] [2021-08-12 19:41:58,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:41:58,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:41:58,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:41:58,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:41:58,915 INFO L87 Difference]: Start difference. First operand 2791 states and 10759 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 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) [2021-08-12 19:41:59,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:41:59,707 INFO L93 Difference]: Finished difference Result 7732 states and 29470 transitions. [2021-08-12 19:41:59,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:41:59,708 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 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 29 [2021-08-12 19:41:59,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:41:59,745 INFO L225 Difference]: With dead ends: 7732 [2021-08-12 19:41:59,745 INFO L226 Difference]: Without dead ends: 7083 [2021-08-12 19:41:59,748 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 184.3ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:41:59,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7083 states. [2021-08-12 19:41:59,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7083 to 2938. [2021-08-12 19:41:59,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 3.892066734763364) internal successors, (11431), 2937 states have internal predecessors, (11431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:41:59,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 11431 transitions. [2021-08-12 19:41:59,900 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 11431 transitions. Word has length 29 [2021-08-12 19:41:59,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:41:59,900 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 11431 transitions. [2021-08-12 19:41:59,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 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) [2021-08-12 19:41:59,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 11431 transitions. [2021-08-12 19:41:59,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:41:59,907 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:41:59,907 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:00,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:00,123 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:00,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:00,123 INFO L82 PathProgramCache]: Analyzing trace with hash -278300307, now seen corresponding path program 1 times [2021-08-12 19:42:00,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:00,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314122203] [2021-08-12 19:42:00,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:42:00,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:00,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314122203] [2021-08-12 19:42:00,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314122203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:00,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514705303] [2021-08-12 19:42:00,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-08-12 19:42:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:00,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 19:42:00,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:00,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:42:00,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514705303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:00,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:00,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-08-12 19:42:00,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084871099] [2021-08-12 19:42:00,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:42:00,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:00,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:42:00,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:42:00,290 INFO L87 Difference]: Start difference. First operand 2938 states and 11431 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:01,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:01,220 INFO L93 Difference]: Finished difference Result 12093 states and 45867 transitions. [2021-08-12 19:42:01,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:42:01,220 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:42:01,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:01,260 INFO L225 Difference]: With dead ends: 12093 [2021-08-12 19:42:01,260 INFO L226 Difference]: Without dead ends: 10471 [2021-08-12 19:42:01,265 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:42:01,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10471 states. [2021-08-12 19:42:01,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10471 to 4032. [2021-08-12 19:42:01,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4032 states, 4031 states have (on average 4.0637558918382535) internal successors, (16381), 4031 states have internal predecessors, (16381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:01,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4032 states to 4032 states and 16381 transitions. [2021-08-12 19:42:01,583 INFO L78 Accepts]: Start accepts. Automaton has 4032 states and 16381 transitions. Word has length 29 [2021-08-12 19:42:01,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:01,584 INFO L482 AbstractCegarLoop]: Abstraction has 4032 states and 16381 transitions. [2021-08-12 19:42:01,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:01,584 INFO L276 IsEmpty]: Start isEmpty. Operand 4032 states and 16381 transitions. [2021-08-12 19:42:01,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:42:01,594 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:01,594 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:01,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-08-12 19:42:01,811 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:01,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:01,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1740155411, now seen corresponding path program 2 times [2021-08-12 19:42:01,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:01,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329129252] [2021-08-12 19:42:01,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:01,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:42:01,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:01,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329129252] [2021-08-12 19:42:01,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329129252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:01,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506995632] [2021-08-12 19:42:01,857 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 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 [2021-08-12 19:42:01,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:42:01,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:01,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 19:42:01,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:01,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:42:01,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506995632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:01,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:01,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-08-12 19:42:01,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397770710] [2021-08-12 19:42:01,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:42:01,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:01,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:42:01,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:42:01,982 INFO L87 Difference]: Start difference. First operand 4032 states and 16381 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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) [2021-08-12 19:42:02,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:02,997 INFO L93 Difference]: Finished difference Result 10379 states and 39104 transitions. [2021-08-12 19:42:02,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:42:02,998 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 29 [2021-08-12 19:42:02,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:03,036 INFO L225 Difference]: With dead ends: 10379 [2021-08-12 19:42:03,036 INFO L226 Difference]: Without dead ends: 9257 [2021-08-12 19:42:03,041 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:42:03,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9257 states. [2021-08-12 19:42:03,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9257 to 4377. [2021-08-12 19:42:03,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4377 states, 4376 states have (on average 4.039076782449726) internal successors, (17675), 4376 states have internal predecessors, (17675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:03,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4377 states to 4377 states and 17675 transitions. [2021-08-12 19:42:03,310 INFO L78 Accepts]: Start accepts. Automaton has 4377 states and 17675 transitions. Word has length 29 [2021-08-12 19:42:03,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:03,311 INFO L482 AbstractCegarLoop]: Abstraction has 4377 states and 17675 transitions. [2021-08-12 19:42:03,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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) [2021-08-12 19:42:03,311 INFO L276 IsEmpty]: Start isEmpty. Operand 4377 states and 17675 transitions. [2021-08-12 19:42:03,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:42:03,320 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:03,320 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:03,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:03,533 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:03,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:03,533 INFO L82 PathProgramCache]: Analyzing trace with hash 805726646, now seen corresponding path program 4 times [2021-08-12 19:42:03,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:03,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740561031] [2021-08-12 19:42:03,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:03,578 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:03,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:03,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740561031] [2021-08-12 19:42:03,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740561031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:03,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111768806] [2021-08-12 19:42:03,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:03,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:42:03,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:03,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 19:42:03,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:03,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111768806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:03,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:03,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-08-12 19:42:03,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228867050] [2021-08-12 19:42:03,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:42:03,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:03,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:42:03,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:42:03,679 INFO L87 Difference]: Start difference. First operand 4377 states and 17675 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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) [2021-08-12 19:42:04,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:04,301 INFO L93 Difference]: Finished difference Result 9894 states and 40307 transitions. [2021-08-12 19:42:04,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:42:04,302 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-12 19:42:04,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:04,333 INFO L225 Difference]: With dead ends: 9894 [2021-08-12 19:42:04,333 INFO L226 Difference]: Without dead ends: 8349 [2021-08-12 19:42:04,337 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:42:04,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8349 states. [2021-08-12 19:42:04,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8349 to 6935. [2021-08-12 19:42:04,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6935 states, 6934 states have (on average 4.129795211998847) internal successors, (28636), 6934 states have internal predecessors, (28636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:04,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6935 states to 6935 states and 28636 transitions. [2021-08-12 19:42:04,625 INFO L78 Accepts]: Start accepts. Automaton has 6935 states and 28636 transitions. Word has length 31 [2021-08-12 19:42:04,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:04,625 INFO L482 AbstractCegarLoop]: Abstraction has 6935 states and 28636 transitions. [2021-08-12 19:42:04,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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) [2021-08-12 19:42:04,626 INFO L276 IsEmpty]: Start isEmpty. Operand 6935 states and 28636 transitions. [2021-08-12 19:42:04,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:42:04,648 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:04,648 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:04,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:04,861 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:04,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:04,861 INFO L82 PathProgramCache]: Analyzing trace with hash 2078445969, now seen corresponding path program 3 times [2021-08-12 19:42:04,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:04,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485545366] [2021-08-12 19:42:04,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:04,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:42:04,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:04,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485545366] [2021-08-12 19:42:04,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485545366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:04,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434531972] [2021-08-12 19:42:04,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:04,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:42:04,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:04,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:42:04,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:04,984 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:42:04,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434531972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:04,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:04,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-12 19:42:04,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253586622] [2021-08-12 19:42:04,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 19:42:04,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:04,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 19:42:04,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:42:04,985 INFO L87 Difference]: Start difference. First operand 6935 states and 28636 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-08-12 19:42:05,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:05,640 INFO L93 Difference]: Finished difference Result 9255 states and 37842 transitions. [2021-08-12 19:42:05,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:42:05,640 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:42:05,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:05,673 INFO L225 Difference]: With dead ends: 9255 [2021-08-12 19:42:05,673 INFO L226 Difference]: Without dead ends: 8766 [2021-08-12 19:42:05,675 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:42:05,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8766 states. [2021-08-12 19:42:06,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8766 to 6543. [2021-08-12 19:42:06,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6543 states, 6542 states have (on average 4.076123509630083) internal successors, (26666), 6542 states have internal predecessors, (26666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:06,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6543 states to 6543 states and 26666 transitions. [2021-08-12 19:42:06,052 INFO L78 Accepts]: Start accepts. Automaton has 6543 states and 26666 transitions. Word has length 32 [2021-08-12 19:42:06,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:06,052 INFO L482 AbstractCegarLoop]: Abstraction has 6543 states and 26666 transitions. [2021-08-12 19:42:06,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-08-12 19:42:06,053 INFO L276 IsEmpty]: Start isEmpty. Operand 6543 states and 26666 transitions. [2021-08-12 19:42:06,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:42:06,067 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:06,067 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:06,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-12 19:42:06,281 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:06,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:06,281 INFO L82 PathProgramCache]: Analyzing trace with hash -2103834406, now seen corresponding path program 5 times [2021-08-12 19:42:06,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:06,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831861906] [2021-08-12 19:42:06,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:06,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:06,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831861906] [2021-08-12 19:42:06,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831861906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:06,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798599828] [2021-08-12 19:42:06,376 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 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 [2021-08-12 19:42:06,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 19:42:06,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:06,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:42:06,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:06,592 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 19:42:06,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 16 [2021-08-12 19:42:06,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:06,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:06,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:42:06,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:3 [2021-08-12 19:42:06,620 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:06,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798599828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:06,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:06,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-12 19:42:06,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557464862] [2021-08-12 19:42:06,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:42:06,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:06,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:42:06,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:42:06,621 INFO L87 Difference]: Start difference. First operand 6543 states and 26666 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 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) [2021-08-12 19:42:08,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:08,387 INFO L93 Difference]: Finished difference Result 15516 states and 62644 transitions. [2021-08-12 19:42:08,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:42:08,387 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 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 34 [2021-08-12 19:42:08,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:08,445 INFO L225 Difference]: With dead ends: 15516 [2021-08-12 19:42:08,445 INFO L226 Difference]: Without dead ends: 14945 [2021-08-12 19:42:08,451 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 285.8ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:42:08,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14945 states. [2021-08-12 19:42:08,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14945 to 6988. [2021-08-12 19:42:08,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6988 states, 6987 states have (on average 4.0978960927436665) internal successors, (28632), 6987 states have internal predecessors, (28632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:08,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6988 states to 6988 states and 28632 transitions. [2021-08-12 19:42:08,867 INFO L78 Accepts]: Start accepts. Automaton has 6988 states and 28632 transitions. Word has length 34 [2021-08-12 19:42:08,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:08,867 INFO L482 AbstractCegarLoop]: Abstraction has 6988 states and 28632 transitions. [2021-08-12 19:42:08,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 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) [2021-08-12 19:42:08,867 INFO L276 IsEmpty]: Start isEmpty. Operand 6988 states and 28632 transitions. [2021-08-12 19:42:08,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:42:08,881 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:08,881 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:09,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:09,097 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:09,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:09,097 INFO L82 PathProgramCache]: Analyzing trace with hash -261271277, now seen corresponding path program 4 times [2021-08-12 19:42:09,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:09,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4855068] [2021-08-12 19:42:09,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:09,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:09,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:09,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:09,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4855068] [2021-08-12 19:42:09,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4855068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:09,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151944645] [2021-08-12 19:42:09,189 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 [2021-08-12 19:42:09,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:42:09,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:09,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:42:09,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:09,347 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-12 19:42:09,347 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-08-12 19:42:09,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:09,356 INFO L628 ElimStorePlain]: treesize reduction 7, result has 65.0 percent of original size [2021-08-12 19:42:09,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:42:09,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-08-12 19:42:09,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-12 19:42:09,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:09,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:09,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:42:09,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-08-12 19:42:09,423 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:09,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151944645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:09,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:09,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:42:09,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368796158] [2021-08-12 19:42:09,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:42:09,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:09,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:42:09,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:42:09,424 INFO L87 Difference]: Start difference. First operand 6988 states and 28632 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:13,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:13,098 INFO L93 Difference]: Finished difference Result 25402 states and 103220 transitions. [2021-08-12 19:42:13,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:42:13,098 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-12 19:42:13,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:13,184 INFO L225 Difference]: With dead ends: 25402 [2021-08-12 19:42:13,184 INFO L226 Difference]: Without dead ends: 25281 [2021-08-12 19:42:13,191 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 271.8ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:42:13,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25281 states. [2021-08-12 19:42:13,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25281 to 9001. [2021-08-12 19:42:13,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9001 states, 9000 states have (on average 4.129111111111111) internal successors, (37162), 9000 states have internal predecessors, (37162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:13,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9001 states to 9001 states and 37162 transitions. [2021-08-12 19:42:13,808 INFO L78 Accepts]: Start accepts. Automaton has 9001 states and 37162 transitions. Word has length 34 [2021-08-12 19:42:13,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:13,808 INFO L482 AbstractCegarLoop]: Abstraction has 9001 states and 37162 transitions. [2021-08-12 19:42:13,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:13,808 INFO L276 IsEmpty]: Start isEmpty. Operand 9001 states and 37162 transitions. [2021-08-12 19:42:13,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:42:13,826 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:13,826 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:14,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:14,041 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:14,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:14,041 INFO L82 PathProgramCache]: Analyzing trace with hash -2139027627, now seen corresponding path program 5 times [2021-08-12 19:42:14,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:14,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965466631] [2021-08-12 19:42:14,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:14,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:14,132 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:14,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:14,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965466631] [2021-08-12 19:42:14,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965466631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:14,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102419984] [2021-08-12 19:42:14,133 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 [2021-08-12 19:42:14,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:42:14,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:14,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-12 19:42:14,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:14,279 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 23 treesize of output 19 [2021-08-12 19:42:14,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:14,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:14,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:42:14,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:32 [2021-08-12 19:42:14,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:14,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:14,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:14,342 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:14,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 46 [2021-08-12 19:42:14,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:42:14,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:14,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 19:42:14,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:19 [2021-08-12 19:42:14,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:14,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102419984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:14,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:14,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-12 19:42:14,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726962309] [2021-08-12 19:42:14,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:42:14,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:14,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:42:14,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:42:14,412 INFO L87 Difference]: Start difference. First operand 9001 states and 37162 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 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) [2021-08-12 19:42:19,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:19,983 INFO L93 Difference]: Finished difference Result 32460 states and 131493 transitions. [2021-08-12 19:42:19,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:42:19,984 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 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 34 [2021-08-12 19:42:19,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:20,090 INFO L225 Difference]: With dead ends: 32460 [2021-08-12 19:42:20,090 INFO L226 Difference]: Without dead ends: 32180 [2021-08-12 19:42:20,099 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 518.5ms TimeCoverageRelationStatistics Valid=178, Invalid=1012, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 19:42:20,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32180 states. [2021-08-12 19:42:20,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32180 to 10707. [2021-08-12 19:42:20,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10707 states, 10706 states have (on average 4.137492994582477) internal successors, (44296), 10706 states have internal predecessors, (44296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:20,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10707 states to 10707 states and 44296 transitions. [2021-08-12 19:42:20,942 INFO L78 Accepts]: Start accepts. Automaton has 10707 states and 44296 transitions. Word has length 34 [2021-08-12 19:42:20,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:20,942 INFO L482 AbstractCegarLoop]: Abstraction has 10707 states and 44296 transitions. [2021-08-12 19:42:20,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 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) [2021-08-12 19:42:20,942 INFO L276 IsEmpty]: Start isEmpty. Operand 10707 states and 44296 transitions. [2021-08-12 19:42:20,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:42:20,963 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:20,963 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:21,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-12 19:42:21,163 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:21,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:21,164 INFO L82 PathProgramCache]: Analyzing trace with hash 558139797, now seen corresponding path program 6 times [2021-08-12 19:42:21,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:21,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474968960] [2021-08-12 19:42:21,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:21,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:21,233 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:21,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:21,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474968960] [2021-08-12 19:42:21,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474968960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:21,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496453321] [2021-08-12 19:42:21,233 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 [2021-08-12 19:42:21,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:42:21,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:21,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:42:21,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:21,405 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 26 treesize of output 20 [2021-08-12 19:42:21,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:21,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:21,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:42:21,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:29 [2021-08-12 19:42:21,464 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-12 19:42:21,464 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-12 19:42:21,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:21,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:21,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:42:21,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-08-12 19:42:21,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:21,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496453321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:21,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:21,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:42:21,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233533027] [2021-08-12 19:42:21,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:42:21,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:21,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:42:21,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:42:21,485 INFO L87 Difference]: Start difference. First operand 10707 states and 44296 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:26,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:26,536 INFO L93 Difference]: Finished difference Result 26536 states and 108258 transitions. [2021-08-12 19:42:26,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:42:26,536 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-12 19:42:26,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:26,623 INFO L225 Difference]: With dead ends: 26536 [2021-08-12 19:42:26,623 INFO L226 Difference]: Without dead ends: 26159 [2021-08-12 19:42:26,632 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 273.4ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:42:26,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26159 states. [2021-08-12 19:42:27,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26159 to 10839. [2021-08-12 19:42:27,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10839 states, 10838 states have (on average 4.141169957556745) internal successors, (44882), 10838 states have internal predecessors, (44882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:27,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10839 states to 10839 states and 44882 transitions. [2021-08-12 19:42:27,496 INFO L78 Accepts]: Start accepts. Automaton has 10839 states and 44882 transitions. Word has length 34 [2021-08-12 19:42:27,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:27,496 INFO L482 AbstractCegarLoop]: Abstraction has 10839 states and 44882 transitions. [2021-08-12 19:42:27,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:27,496 INFO L276 IsEmpty]: Start isEmpty. Operand 10839 states and 44882 transitions. [2021-08-12 19:42:27,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:42:27,515 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:27,515 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:27,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:27,715 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:27,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:27,716 INFO L82 PathProgramCache]: Analyzing trace with hash -915631833, now seen corresponding path program 7 times [2021-08-12 19:42:27,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:27,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729912074] [2021-08-12 19:42:27,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:27,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:27,788 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:27,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:27,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729912074] [2021-08-12 19:42:27,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729912074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:27,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104761288] [2021-08-12 19:42:27,789 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 [2021-08-12 19:42:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:27,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:42:27,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:27,917 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-12 19:42:27,917 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2021-08-12 19:42:27,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:27,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:27,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:42:27,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:12 [2021-08-12 19:42:28,006 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 27 treesize of output 21 [2021-08-12 19:42:28,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:28,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:28,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:42:28,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-08-12 19:42:28,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:28,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104761288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:28,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:28,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:42:28,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036605289] [2021-08-12 19:42:28,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:42:28,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:28,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:42:28,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:42:28,025 INFO L87 Difference]: Start difference. First operand 10839 states and 44882 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:29,018 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-08-12 19:42:34,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:34,156 INFO L93 Difference]: Finished difference Result 26320 states and 105172 transitions. [2021-08-12 19:42:34,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:42:34,157 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-12 19:42:34,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:34,243 INFO L225 Difference]: With dead ends: 26320 [2021-08-12 19:42:34,243 INFO L226 Difference]: Without dead ends: 26199 [2021-08-12 19:42:34,251 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 532.9ms TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:42:34,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26199 states. [2021-08-12 19:42:35,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26199 to 11097. [2021-08-12 19:42:35,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11097 states, 11096 states have (on average 4.143294881038212) internal successors, (45974), 11096 states have internal predecessors, (45974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:35,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11097 states to 11097 states and 45974 transitions. [2021-08-12 19:42:35,220 INFO L78 Accepts]: Start accepts. Automaton has 11097 states and 45974 transitions. Word has length 34 [2021-08-12 19:42:35,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:35,220 INFO L482 AbstractCegarLoop]: Abstraction has 11097 states and 45974 transitions. [2021-08-12 19:42:35,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:35,220 INFO L276 IsEmpty]: Start isEmpty. Operand 11097 states and 45974 transitions. [2021-08-12 19:42:35,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:42:35,239 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:35,239 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:35,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-12 19:42:35,440 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:35,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:35,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1690450347, now seen corresponding path program 8 times [2021-08-12 19:42:35,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:35,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988179292] [2021-08-12 19:42:35,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:35,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:35,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988179292] [2021-08-12 19:42:35,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988179292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:35,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515622613] [2021-08-12 19:42:35,505 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 [2021-08-12 19:42:35,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:42:35,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:35,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:42:35,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:35,659 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-12 19:42:35,659 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-08-12 19:42:35,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:35,667 INFO L628 ElimStorePlain]: treesize reduction 7, result has 65.0 percent of original size [2021-08-12 19:42:35,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:42:35,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-08-12 19:42:35,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-12 19:42:35,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:35,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:35,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:42:35,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-08-12 19:42:35,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:35,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515622613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:35,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:35,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:42:35,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32499243] [2021-08-12 19:42:35,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:42:35,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:35,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:42:35,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:42:35,716 INFO L87 Difference]: Start difference. First operand 11097 states and 45974 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:41,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:41,991 INFO L93 Difference]: Finished difference Result 27576 states and 112520 transitions. [2021-08-12 19:42:41,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:42:41,992 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-12 19:42:41,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:42,083 INFO L225 Difference]: With dead ends: 27576 [2021-08-12 19:42:42,083 INFO L226 Difference]: Without dead ends: 27455 [2021-08-12 19:42:42,091 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 252.4ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:42:42,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27455 states. [2021-08-12 19:42:43,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27455 to 11115. [2021-08-12 19:42:43,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11115 states, 11114 states have (on average 4.143332733489292) internal successors, (46049), 11114 states have internal predecessors, (46049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:43,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11115 states to 11115 states and 46049 transitions. [2021-08-12 19:42:43,195 INFO L78 Accepts]: Start accepts. Automaton has 11115 states and 46049 transitions. Word has length 34 [2021-08-12 19:42:43,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:43,195 INFO L482 AbstractCegarLoop]: Abstraction has 11115 states and 46049 transitions. [2021-08-12 19:42:43,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:43,195 INFO L276 IsEmpty]: Start isEmpty. Operand 11115 states and 46049 transitions. [2021-08-12 19:42:43,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:42:43,213 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:43,213 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:43,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:43,414 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:43,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:43,414 INFO L82 PathProgramCache]: Analyzing trace with hash 726760599, now seen corresponding path program 9 times [2021-08-12 19:42:43,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:43,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383709684] [2021-08-12 19:42:43,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:43,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:43,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:43,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383709684] [2021-08-12 19:42:43,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383709684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:43,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140817936] [2021-08-12 19:42:43,478 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 [2021-08-12 19:42:43,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:42:43,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:43,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:42:43,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:43,673 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 30 treesize of output 24 [2021-08-12 19:42:43,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:43,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:43,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-08-12 19:42:43,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:27 [2021-08-12 19:42:43,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:43,715 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-08-12 19:42:43,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:42:43,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:43,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 19:42:43,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:19 [2021-08-12 19:42:43,761 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:43,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140817936] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:43,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:43,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-12 19:42:43,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768535446] [2021-08-12 19:42:43,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:42:43,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:43,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:42:43,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:42:43,764 INFO L87 Difference]: Start difference. First operand 11115 states and 46049 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 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) [2021-08-12 19:42:52,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:52,719 INFO L93 Difference]: Finished difference Result 36726 states and 147847 transitions. [2021-08-12 19:42:52,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:42:52,719 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 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 34 [2021-08-12 19:42:52,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:52,831 INFO L225 Difference]: With dead ends: 36726 [2021-08-12 19:42:52,832 INFO L226 Difference]: Without dead ends: 36230 [2021-08-12 19:42:52,844 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 476.5ms TimeCoverageRelationStatistics Valid=195, Invalid=735, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:42:52,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36230 states. [2021-08-12 19:42:54,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36230 to 12619. [2021-08-12 19:42:54,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12619 states, 12618 states have (on average 4.176890156918687) internal successors, (52704), 12618 states have internal predecessors, (52704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:54,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12619 states to 12619 states and 52704 transitions. [2021-08-12 19:42:54,202 INFO L78 Accepts]: Start accepts. Automaton has 12619 states and 52704 transitions. Word has length 34 [2021-08-12 19:42:54,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:54,202 INFO L482 AbstractCegarLoop]: Abstraction has 12619 states and 52704 transitions. [2021-08-12 19:42:54,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 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) [2021-08-12 19:42:54,202 INFO L276 IsEmpty]: Start isEmpty. Operand 12619 states and 52704 transitions. [2021-08-12 19:42:54,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:42:54,229 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:54,229 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:54,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-12 19:42:54,436 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:54,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:54,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1859008693, now seen corresponding path program 10 times [2021-08-12 19:42:54,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:54,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844878682] [2021-08-12 19:42:54,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:54,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:54,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:54,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844878682] [2021-08-12 19:42:54,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844878682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:54,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161768193] [2021-08-12 19:42:54,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:42:54,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:42:54,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:54,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:42:54,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:54,657 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-12 19:42:54,657 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-08-12 19:42:54,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:54,664 INFO L628 ElimStorePlain]: treesize reduction 7, result has 65.0 percent of original size [2021-08-12 19:42:54,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:42:54,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-08-12 19:42:54,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-12 19:42:54,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:54,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:54,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:42:54,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-08-12 19:42:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:54,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161768193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:54,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:54,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:42:54,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037066857] [2021-08-12 19:42:54,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:42:54,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:54,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:42:54,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:42:54,723 INFO L87 Difference]: Start difference. First operand 12619 states and 52704 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:03,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:03,080 INFO L93 Difference]: Finished difference Result 29756 states and 122737 transitions. [2021-08-12 19:43:03,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:43:03,080 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-12 19:43:03,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:03,188 INFO L225 Difference]: With dead ends: 29756 [2021-08-12 19:43:03,188 INFO L226 Difference]: Without dead ends: 29635 [2021-08-12 19:43:03,199 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 276.6ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:43:03,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29635 states. [2021-08-12 19:43:04,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29635 to 13941. [2021-08-12 19:43:04,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13941 states, 13940 states have (on average 4.193615494978479) internal successors, (58459), 13940 states have internal predecessors, (58459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:04,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13941 states to 13941 states and 58459 transitions. [2021-08-12 19:43:04,704 INFO L78 Accepts]: Start accepts. Automaton has 13941 states and 58459 transitions. Word has length 34 [2021-08-12 19:43:04,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:04,704 INFO L482 AbstractCegarLoop]: Abstraction has 13941 states and 58459 transitions. [2021-08-12 19:43:04,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:04,704 INFO L276 IsEmpty]: Start isEmpty. Operand 13941 states and 58459 transitions. [2021-08-12 19:43:04,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:43:04,731 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:04,731 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:04,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-12 19:43:04,945 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:04,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:04,945 INFO L82 PathProgramCache]: Analyzing trace with hash 558202253, now seen corresponding path program 11 times [2021-08-12 19:43:04,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:04,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804330925] [2021-08-12 19:43:04,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:05,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:05,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804330925] [2021-08-12 19:43:05,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804330925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:05,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516699276] [2021-08-12 19:43:05,019 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 [2021-08-12 19:43:05,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:43:05,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:05,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 19:43:05,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:05,317 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 28 treesize of output 22 [2021-08-12 19:43:05,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:05,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:43:05,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-08-12 19:43:05,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:53, output treesize:38 [2021-08-12 19:43:05,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:43:05,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:43:05,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:43:05,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-08-12 19:43:05,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:05,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:43:05,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:43:05,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:3 [2021-08-12 19:43:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:05,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516699276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:05,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:05,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:43:05,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589979697] [2021-08-12 19:43:05,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:43:05,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:05,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:43:05,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:43:05,403 INFO L87 Difference]: Start difference. First operand 13941 states and 58459 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:13,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:13,366 INFO L93 Difference]: Finished difference Result 26329 states and 107477 transitions. [2021-08-12 19:43:13,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:43:13,367 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-12 19:43:13,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:13,451 INFO L225 Difference]: With dead ends: 26329 [2021-08-12 19:43:13,452 INFO L226 Difference]: Without dead ends: 26057 [2021-08-12 19:43:13,458 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 385.1ms TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:43:13,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26057 states. [2021-08-12 19:43:14,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26057 to 13741. [2021-08-12 19:43:14,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13741 states, 13740 states have (on average 4.189010189228529) internal successors, (57557), 13740 states have internal predecessors, (57557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:14,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13741 states to 13741 states and 57557 transitions. [2021-08-12 19:43:14,865 INFO L78 Accepts]: Start accepts. Automaton has 13741 states and 57557 transitions. Word has length 34 [2021-08-12 19:43:14,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:14,865 INFO L482 AbstractCegarLoop]: Abstraction has 13741 states and 57557 transitions. [2021-08-12 19:43:14,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:14,866 INFO L276 IsEmpty]: Start isEmpty. Operand 13741 states and 57557 transitions. [2021-08-12 19:43:14,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:43:14,892 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:14,892 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:15,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-12 19:43:15,093 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:15,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:15,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1039597619, now seen corresponding path program 12 times [2021-08-12 19:43:15,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:15,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030038183] [2021-08-12 19:43:15,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:15,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:15,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:15,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:15,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030038183] [2021-08-12 19:43:15,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030038183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:15,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907927425] [2021-08-12 19:43:15,174 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 [2021-08-12 19:43:15,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:43:15,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:15,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 19:43:15,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:15,320 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 26 treesize of output 20 [2021-08-12 19:43:15,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:15,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:43:15,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:43:15,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:29 [2021-08-12 19:43:15,370 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-12 19:43:15,370 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-12 19:43:15,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:15,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:43:15,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:43:15,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-08-12 19:43:15,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:15,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907927425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:15,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:15,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:43:15,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039314133] [2021-08-12 19:43:15,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:43:15,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:15,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:43:15,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:43:15,391 INFO L87 Difference]: Start difference. First operand 13741 states and 57557 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:24,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:24,369 INFO L93 Difference]: Finished difference Result 29052 states and 119506 transitions. [2021-08-12 19:43:24,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:43:24,369 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-12 19:43:24,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:24,475 INFO L225 Difference]: With dead ends: 29052 [2021-08-12 19:43:24,475 INFO L226 Difference]: Without dead ends: 28675 [2021-08-12 19:43:24,485 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 298.7ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:43:24,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28675 states. [2021-08-12 19:43:26,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28675 to 12934. [2021-08-12 19:43:26,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12934 states, 12933 states have (on average 4.187582154179231) internal successors, (54158), 12933 states have internal predecessors, (54158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:26,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12934 states to 12934 states and 54158 transitions. [2021-08-12 19:43:26,234 INFO L78 Accepts]: Start accepts. Automaton has 12934 states and 54158 transitions. Word has length 34 [2021-08-12 19:43:26,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:26,234 INFO L482 AbstractCegarLoop]: Abstraction has 12934 states and 54158 transitions. [2021-08-12 19:43:26,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:26,234 INFO L276 IsEmpty]: Start isEmpty. Operand 12934 states and 54158 transitions. [2021-08-12 19:43:26,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:43:26,259 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:26,259 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:26,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:26,459 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:26,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:26,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1263963071, now seen corresponding path program 13 times [2021-08-12 19:43:26,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:26,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793586668] [2021-08-12 19:43:26,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:26,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:26,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:26,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:26,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793586668] [2021-08-12 19:43:26,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793586668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:26,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408155596] [2021-08-12 19:43:26,549 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 [2021-08-12 19:43:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:26,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:43:26,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:26,697 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-12 19:43:26,697 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-08-12 19:43:26,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:26,705 INFO L628 ElimStorePlain]: treesize reduction 7, result has 65.0 percent of original size [2021-08-12 19:43:26,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:43:26,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-08-12 19:43:26,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-12 19:43:26,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:26,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:43:26,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:43:26,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-08-12 19:43:26,761 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:26,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408155596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:26,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:26,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:43:26,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860630685] [2021-08-12 19:43:26,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:43:26,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:26,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:43:26,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:43:26,763 INFO L87 Difference]: Start difference. First operand 12934 states and 54158 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:37,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:37,566 INFO L93 Difference]: Finished difference Result 29791 states and 122416 transitions. [2021-08-12 19:43:37,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:43:37,567 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-12 19:43:37,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:37,667 INFO L225 Difference]: With dead ends: 29791 [2021-08-12 19:43:37,668 INFO L226 Difference]: Without dead ends: 29670 [2021-08-12 19:43:37,677 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 509.6ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:43:37,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29670 states. [2021-08-12 19:43:39,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29670 to 13720. [2021-08-12 19:43:39,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13720 states, 13719 states have (on average 4.202638676288359) internal successors, (57656), 13719 states have internal predecessors, (57656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:39,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13720 states to 13720 states and 57656 transitions. [2021-08-12 19:43:39,345 INFO L78 Accepts]: Start accepts. Automaton has 13720 states and 57656 transitions. Word has length 34 [2021-08-12 19:43:39,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:39,346 INFO L482 AbstractCegarLoop]: Abstraction has 13720 states and 57656 transitions. [2021-08-12 19:43:39,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:39,346 INFO L276 IsEmpty]: Start isEmpty. Operand 13720 states and 57656 transitions. [2021-08-12 19:43:39,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:43:39,370 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:39,371 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:39,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:43:39,573 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:39,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:39,574 INFO L82 PathProgramCache]: Analyzing trace with hash 308825101, now seen corresponding path program 14 times [2021-08-12 19:43:39,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:39,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896518050] [2021-08-12 19:43:39,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:39,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:39,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:39,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:39,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896518050] [2021-08-12 19:43:39,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896518050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:39,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299649804] [2021-08-12 19:43:39,655 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 [2021-08-12 19:43:39,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:43:39,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:39,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:43:39,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:39,812 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 32 treesize of output 26 [2021-08-12 19:43:39,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:39,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:43:39,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:43:39,819 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:27 [2021-08-12 19:43:39,842 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-12 19:43:39,842 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-12 19:43:39,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:39,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:43:39,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:43:39,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-08-12 19:43:39,858 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:39,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299649804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:39,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:39,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:43:39,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809572396] [2021-08-12 19:43:39,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:43:39,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:39,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:43:39,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:43:39,859 INFO L87 Difference]: Start difference. First operand 13720 states and 57656 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:49,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:43:49,362 INFO L93 Difference]: Finished difference Result 26213 states and 107590 transitions. [2021-08-12 19:43:49,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:43:49,363 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-12 19:43:49,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:43:49,449 INFO L225 Difference]: With dead ends: 26213 [2021-08-12 19:43:49,449 INFO L226 Difference]: Without dead ends: 25964 [2021-08-12 19:43:49,458 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 359.4ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:43:49,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25964 states. [2021-08-12 19:43:51,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25964 to 13612. [2021-08-12 19:43:51,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13612 states, 13611 states have (on average 4.200573065902579) internal successors, (57174), 13611 states have internal predecessors, (57174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:51,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13612 states to 13612 states and 57174 transitions. [2021-08-12 19:43:51,134 INFO L78 Accepts]: Start accepts. Automaton has 13612 states and 57174 transitions. Word has length 34 [2021-08-12 19:43:51,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:43:51,134 INFO L482 AbstractCegarLoop]: Abstraction has 13612 states and 57174 transitions. [2021-08-12 19:43:51,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:43:51,134 INFO L276 IsEmpty]: Start isEmpty. Operand 13612 states and 57174 transitions. [2021-08-12 19:43:51,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:43:51,161 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:43:51,161 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:43:51,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-12 19:43:51,361 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:43:51,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:43:51,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1831752029, now seen corresponding path program 15 times [2021-08-12 19:43:51,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:43:51,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492912545] [2021-08-12 19:43:51,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:43:51,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:43:51,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:51,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:43:51,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492912545] [2021-08-12 19:43:51,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492912545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:51,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927543530] [2021-08-12 19:43:51,451 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 [2021-08-12 19:43:51,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:43:51,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:43:51,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:43:51,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:43:51,568 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 19 treesize of output 15 [2021-08-12 19:43:51,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:43:51,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:43:51,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:43:51,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:20 [2021-08-12 19:43:51,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:43:51,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:43:51,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 37 [2021-08-12 19:43:51,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:43:51,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:43:51,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 19:43:51,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:24 [2021-08-12 19:43:51,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:43:51,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927543530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:43:51,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:43:51,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-12 19:43:51,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370145104] [2021-08-12 19:43:51,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:43:51,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:43:51,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:43:51,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:43:51,690 INFO L87 Difference]: Start difference. First operand 13612 states and 57174 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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) [2021-08-12 19:44:03,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:03,842 INFO L93 Difference]: Finished difference Result 30451 states and 124372 transitions. [2021-08-12 19:44:03,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 19:44:03,842 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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 34 [2021-08-12 19:44:03,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:03,935 INFO L225 Difference]: With dead ends: 30451 [2021-08-12 19:44:03,935 INFO L226 Difference]: Without dead ends: 30138 [2021-08-12 19:44:03,942 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 750.7ms TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 19:44:03,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30138 states. [2021-08-12 19:44:05,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30138 to 14418. [2021-08-12 19:44:05,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14418 states, 14417 states have (on average 4.224942775889575) internal successors, (60911), 14417 states have internal predecessors, (60911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:05,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14418 states to 14418 states and 60911 transitions. [2021-08-12 19:44:05,878 INFO L78 Accepts]: Start accepts. Automaton has 14418 states and 60911 transitions. Word has length 34 [2021-08-12 19:44:05,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:05,878 INFO L482 AbstractCegarLoop]: Abstraction has 14418 states and 60911 transitions. [2021-08-12 19:44:05,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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) [2021-08-12 19:44:05,878 INFO L276 IsEmpty]: Start isEmpty. Operand 14418 states and 60911 transitions. [2021-08-12 19:44:05,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:44:05,905 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:05,905 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:06,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-12 19:44:06,106 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:06,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:06,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1129425885, now seen corresponding path program 16 times [2021-08-12 19:44:06,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:06,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598502371] [2021-08-12 19:44:06,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:06,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:06,201 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:06,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:06,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598502371] [2021-08-12 19:44:06,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598502371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:06,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745877075] [2021-08-12 19:44:06,201 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 [2021-08-12 19:44:06,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:44:06,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:44:06,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:44:06,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:06,304 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 13 treesize of output 9 [2021-08-12 19:44:06,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:44:06,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:44:06,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:44:06,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-08-12 19:44:06,376 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-12 19:44:06,376 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-12 19:44:06,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:44:06,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:44:06,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:44:06,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-08-12 19:44:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:06,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745877075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:06,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:06,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:44:06,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647112259] [2021-08-12 19:44:06,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:44:06,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:06,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:44:06,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:44:06,397 INFO L87 Difference]: Start difference. First operand 14418 states and 60911 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:16,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:16,780 INFO L93 Difference]: Finished difference Result 25999 states and 107294 transitions. [2021-08-12 19:44:16,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:44:16,781 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-12 19:44:16,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:16,867 INFO L225 Difference]: With dead ends: 25999 [2021-08-12 19:44:16,867 INFO L226 Difference]: Without dead ends: 25750 [2021-08-12 19:44:16,875 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 383.9ms TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:44:16,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25750 states. [2021-08-12 19:44:18,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25750 to 14703. [2021-08-12 19:44:18,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14703 states, 14702 states have (on average 4.2260916882056865) internal successors, (62132), 14702 states have internal predecessors, (62132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:18,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14703 states to 14703 states and 62132 transitions. [2021-08-12 19:44:18,766 INFO L78 Accepts]: Start accepts. Automaton has 14703 states and 62132 transitions. Word has length 34 [2021-08-12 19:44:18,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:18,767 INFO L482 AbstractCegarLoop]: Abstraction has 14703 states and 62132 transitions. [2021-08-12 19:44:18,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:18,767 INFO L276 IsEmpty]: Start isEmpty. Operand 14703 states and 62132 transitions. [2021-08-12 19:44:18,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:44:18,793 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:18,793 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:18,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:18,994 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:18,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:18,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1413995999, now seen corresponding path program 17 times [2021-08-12 19:44:18,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:18,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258053551] [2021-08-12 19:44:18,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:19,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:19,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258053551] [2021-08-12 19:44:19,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258053551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:19,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154390572] [2021-08-12 19:44:19,060 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 [2021-08-12 19:44:19,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 19:44:19,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:44:19,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 19:44:19,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:19,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-12 19:44:19,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:44:19,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:44:19,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:44:19,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2021-08-12 19:44:19,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:44:19,231 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-08-12 19:44:19,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:44:19,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:44:19,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 19:44:19,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:19 [2021-08-12 19:44:19,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:19,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154390572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:19,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:19,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-12 19:44:19,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107885735] [2021-08-12 19:44:19,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:44:19,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:19,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:44:19,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:44:19,284 INFO L87 Difference]: Start difference. First operand 14703 states and 62132 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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) [2021-08-12 19:44:20,075 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 20 [2021-08-12 19:44:34,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:34,694 INFO L93 Difference]: Finished difference Result 36780 states and 151446 transitions. [2021-08-12 19:44:34,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 19:44:34,695 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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 34 [2021-08-12 19:44:34,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:34,811 INFO L225 Difference]: With dead ends: 36780 [2021-08-12 19:44:34,812 INFO L226 Difference]: Without dead ends: 36316 [2021-08-12 19:44:34,821 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 806.1ms TimeCoverageRelationStatistics Valid=279, Invalid=1053, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 19:44:34,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36316 states. [2021-08-12 19:44:36,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36316 to 15167. [2021-08-12 19:44:36,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15167 states, 15166 states have (on average 4.236845575629698) internal successors, (64256), 15166 states have internal predecessors, (64256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:37,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15167 states to 15167 states and 64256 transitions. [2021-08-12 19:44:37,030 INFO L78 Accepts]: Start accepts. Automaton has 15167 states and 64256 transitions. Word has length 34 [2021-08-12 19:44:37,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:37,030 INFO L482 AbstractCegarLoop]: Abstraction has 15167 states and 64256 transitions. [2021-08-12 19:44:37,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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) [2021-08-12 19:44:37,031 INFO L276 IsEmpty]: Start isEmpty. Operand 15167 states and 64256 transitions. [2021-08-12 19:44:37,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:44:37,057 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:37,057 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:37,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-12 19:44:37,257 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:37,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:37,258 INFO L82 PathProgramCache]: Analyzing trace with hash 445557917, now seen corresponding path program 18 times [2021-08-12 19:44:37,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:37,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128940962] [2021-08-12 19:44:37,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:37,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:37,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128940962] [2021-08-12 19:44:37,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128940962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:37,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518384314] [2021-08-12 19:44:37,323 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 [2021-08-12 19:44:37,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:44:37,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:44:37,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:44:37,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:37,457 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-12 19:44:37,457 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-08-12 19:44:37,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:44:37,465 INFO L628 ElimStorePlain]: treesize reduction 7, result has 65.0 percent of original size [2021-08-12 19:44:37,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:44:37,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-08-12 19:44:37,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-12 19:44:37,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:44:37,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:44:37,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:44:37,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-08-12 19:44:37,511 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:37,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518384314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:37,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:37,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:44:37,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176288249] [2021-08-12 19:44:37,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:44:37,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:37,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:44:37,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:44:37,513 INFO L87 Difference]: Start difference. First operand 15167 states and 64256 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:54,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:44:54,437 INFO L93 Difference]: Finished difference Result 34139 states and 142227 transitions. [2021-08-12 19:44:54,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:44:54,437 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-12 19:44:54,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:44:54,561 INFO L225 Difference]: With dead ends: 34139 [2021-08-12 19:44:54,561 INFO L226 Difference]: Without dead ends: 34018 [2021-08-12 19:44:54,570 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 392.6ms TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:44:54,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34018 states. [2021-08-12 19:44:56,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34018 to 16582. [2021-08-12 19:44:56,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16582 states, 16581 states have (on average 4.253844762077076) internal successors, (70533), 16581 states have internal predecessors, (70533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:57,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16582 states to 16582 states and 70533 transitions. [2021-08-12 19:44:57,059 INFO L78 Accepts]: Start accepts. Automaton has 16582 states and 70533 transitions. Word has length 34 [2021-08-12 19:44:57,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:44:57,059 INFO L482 AbstractCegarLoop]: Abstraction has 16582 states and 70533 transitions. [2021-08-12 19:44:57,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:44:57,060 INFO L276 IsEmpty]: Start isEmpty. Operand 16582 states and 70533 transitions. [2021-08-12 19:44:57,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:44:57,089 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:44:57,089 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:44:57,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:44:57,290 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:44:57,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:44:57,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1432198433, now seen corresponding path program 19 times [2021-08-12 19:44:57,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:44:57,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89089681] [2021-08-12 19:44:57,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:44:57,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:57,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:57,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:44:57,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89089681] [2021-08-12 19:44:57,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89089681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:57,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656318680] [2021-08-12 19:44:57,350 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 [2021-08-12 19:44:57,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:44:57,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:44:57,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:44:57,493 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 32 treesize of output 26 [2021-08-12 19:44:57,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:44:57,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:44:57,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:44:57,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:27 [2021-08-12 19:44:57,523 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-12 19:44:57,523 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-12 19:44:57,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:44:57,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:44:57,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:44:57,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-08-12 19:44:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:44:57,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656318680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:44:57,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:44:57,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:44:57,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362210000] [2021-08-12 19:44:57,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:44:57,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:44:57,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:44:57,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:44:57,540 INFO L87 Difference]: Start difference. First operand 16582 states and 70533 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:12,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:45:12,386 INFO L93 Difference]: Finished difference Result 31841 states and 133098 transitions. [2021-08-12 19:45:12,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:45:12,386 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-12 19:45:12,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:45:12,503 INFO L225 Difference]: With dead ends: 31841 [2021-08-12 19:45:12,503 INFO L226 Difference]: Without dead ends: 31592 [2021-08-12 19:45:12,512 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 221.5ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:45:12,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31592 states. [2021-08-12 19:45:15,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31592 to 16366. [2021-08-12 19:45:15,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16366 states, 16365 states have (on average 4.249984723495264) internal successors, (69551), 16365 states have internal predecessors, (69551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:15,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16366 states to 16366 states and 69551 transitions. [2021-08-12 19:45:15,094 INFO L78 Accepts]: Start accepts. Automaton has 16366 states and 69551 transitions. Word has length 34 [2021-08-12 19:45:15,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:45:15,094 INFO L482 AbstractCegarLoop]: Abstraction has 16366 states and 69551 transitions. [2021-08-12 19:45:15,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:15,094 INFO L276 IsEmpty]: Start isEmpty. Operand 16366 states and 69551 transitions. [2021-08-12 19:45:15,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:45:15,124 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:45:15,125 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:45:15,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-12 19:45:15,325 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:45:15,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:45:15,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1264968991, now seen corresponding path program 20 times [2021-08-12 19:45:15,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:45:15,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124306665] [2021-08-12 19:45:15,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:45:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:45:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:45:15,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:45:15,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124306665] [2021-08-12 19:45:15,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124306665] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:45:15,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799042049] [2021-08-12 19:45:15,393 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 [2021-08-12 19:45:15,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:45:15,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:45:15,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:45:15,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:45:15,529 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 26 treesize of output 20 [2021-08-12 19:45:15,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:45:15,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:45:15,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:45:15,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:29 [2021-08-12 19:45:15,577 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-12 19:45:15,578 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-12 19:45:15,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:45:15,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:45:15,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:45:15,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-08-12 19:45:15,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:45:15,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799042049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:45:15,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:45:15,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:45:15,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134566328] [2021-08-12 19:45:15,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:45:15,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:45:15,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:45:15,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:45:15,599 INFO L87 Difference]: Start difference. First operand 16366 states and 69551 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:32,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:45:32,711 INFO L93 Difference]: Finished difference Result 34699 states and 144831 transitions. [2021-08-12 19:45:32,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:45:32,712 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-12 19:45:32,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:45:32,837 INFO L225 Difference]: With dead ends: 34699 [2021-08-12 19:45:32,837 INFO L226 Difference]: Without dead ends: 34322 [2021-08-12 19:45:32,847 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 257.8ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:45:32,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34322 states. [2021-08-12 19:45:35,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34322 to 15541. [2021-08-12 19:45:35,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15541 states, 15540 states have (on average 4.251287001287001) internal successors, (66065), 15540 states have internal predecessors, (66065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:35,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15541 states to 15541 states and 66065 transitions. [2021-08-12 19:45:35,405 INFO L78 Accepts]: Start accepts. Automaton has 15541 states and 66065 transitions. Word has length 34 [2021-08-12 19:45:35,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:45:35,405 INFO L482 AbstractCegarLoop]: Abstraction has 15541 states and 66065 transitions. [2021-08-12 19:45:35,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:35,406 INFO L276 IsEmpty]: Start isEmpty. Operand 15541 states and 66065 transitions. [2021-08-12 19:45:35,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:45:35,436 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:45:35,436 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:45:35,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-12 19:45:35,636 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:45:35,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:45:35,637 INFO L82 PathProgramCache]: Analyzing trace with hash 472814581, now seen corresponding path program 21 times [2021-08-12 19:45:35,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:45:35,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4591209] [2021-08-12 19:45:35,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:45:35,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:45:35,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:45:35,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:45:35,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4591209] [2021-08-12 19:45:35,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4591209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:45:35,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974614966] [2021-08-12 19:45:35,725 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 [2021-08-12 19:45:35,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:45:35,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:45:35,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:45:35,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:45:35,841 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 19 treesize of output 15 [2021-08-12 19:45:35,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:45:35,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:45:35,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:45:35,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:23 [2021-08-12 19:45:35,890 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-12 19:45:35,890 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-08-12 19:45:35,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:45:35,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:45:35,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:45:35,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:3 [2021-08-12 19:45:35,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:45:35,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974614966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:45:35,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:45:35,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:45:35,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855307920] [2021-08-12 19:45:35,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:45:35,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:45:35,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:45:35,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:45:35,910 INFO L87 Difference]: Start difference. First operand 15541 states and 66065 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:50,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:45:50,104 INFO L93 Difference]: Finished difference Result 27014 states and 112623 transitions. [2021-08-12 19:45:50,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:45:50,104 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-12 19:45:50,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:45:50,200 INFO L225 Difference]: With dead ends: 27014 [2021-08-12 19:45:50,200 INFO L226 Difference]: Without dead ends: 26829 [2021-08-12 19:45:50,208 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 248.1ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:45:50,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26829 states. [2021-08-12 19:45:52,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26829 to 15541. [2021-08-12 19:45:52,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15541 states, 15540 states have (on average 4.251287001287001) internal successors, (66065), 15540 states have internal predecessors, (66065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:52,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15541 states to 15541 states and 66065 transitions. [2021-08-12 19:45:52,791 INFO L78 Accepts]: Start accepts. Automaton has 15541 states and 66065 transitions. Word has length 34 [2021-08-12 19:45:52,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:45:52,791 INFO L482 AbstractCegarLoop]: Abstraction has 15541 states and 66065 transitions. [2021-08-12 19:45:52,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:45:52,791 INFO L276 IsEmpty]: Start isEmpty. Operand 15541 states and 66065 transitions. [2021-08-12 19:45:52,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:45:52,823 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:45:52,823 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:45:53,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-12 19:45:53,023 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:45:53,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:45:53,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1175140725, now seen corresponding path program 22 times [2021-08-12 19:45:53,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:45:53,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853294702] [2021-08-12 19:45:53,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:45:53,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:45:53,093 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:45:53,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:45:53,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853294702] [2021-08-12 19:45:53,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853294702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:45:53,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029536910] [2021-08-12 19:45:53,094 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 [2021-08-12 19:45:53,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:45:53,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:45:53,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:45:53,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:45:53,185 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 13 treesize of output 9 [2021-08-12 19:45:53,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:45:53,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:45:53,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:45:53,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-08-12 19:45:53,245 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-12 19:45:53,246 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-12 19:45:53,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:45:53,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:45:53,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:45:53,248 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-08-12 19:45:53,262 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:45:53,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029536910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:45:53,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:45:53,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:45:53,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364298297] [2021-08-12 19:45:53,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:45:53,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:45:53,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:45:53,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:45:53,264 INFO L87 Difference]: Start difference. First operand 15541 states and 66065 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:46:08,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:46:08,316 INFO L93 Difference]: Finished difference Result 27778 states and 114592 transitions. [2021-08-12 19:46:08,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:46:08,316 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-12 19:46:08,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:46:08,421 INFO L225 Difference]: With dead ends: 27778 [2021-08-12 19:46:08,421 INFO L226 Difference]: Without dead ends: 27529 [2021-08-12 19:46:08,429 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 344.3ms TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:46:08,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27529 states. [2021-08-12 19:46:11,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27529 to 15553. [2021-08-12 19:46:11,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15553 states, 15552 states have (on average 4.251993312757202) internal successors, (66127), 15552 states have internal predecessors, (66127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:46:11,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15553 states to 15553 states and 66127 transitions. [2021-08-12 19:46:11,137 INFO L78 Accepts]: Start accepts. Automaton has 15553 states and 66127 transitions. Word has length 34 [2021-08-12 19:46:11,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:46:11,137 INFO L482 AbstractCegarLoop]: Abstraction has 15553 states and 66127 transitions. [2021-08-12 19:46:11,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:46:11,137 INFO L276 IsEmpty]: Start isEmpty. Operand 15553 states and 66127 transitions. [2021-08-12 19:46:11,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:46:11,165 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:46:11,165 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:46:11,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:46:11,366 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:46:11,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:46:11,366 INFO L82 PathProgramCache]: Analyzing trace with hash -576404687, now seen corresponding path program 23 times [2021-08-12 19:46:11,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:46:11,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984768630] [2021-08-12 19:46:11,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:46:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:46:11,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:46:11,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:46:11,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984768630] [2021-08-12 19:46:11,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984768630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:46:11,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760831206] [2021-08-12 19:46:11,430 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 [2021-08-12 19:46:11,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:46:11,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:46:11,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:46:11,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:46:11,525 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 13 treesize of output 9 [2021-08-12 19:46:11,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:46:11,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:46:11,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:46:11,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-08-12 19:46:11,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:46:11,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:46:11,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:46:11,603 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:46:11,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 46 [2021-08-12 19:46:11,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:46:11,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:46:11,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 19:46:11,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:19 [2021-08-12 19:46:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:46:11,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760831206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:46:11,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:46:11,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-12 19:46:11,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510329016] [2021-08-12 19:46:11,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:46:11,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:46:11,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:46:11,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:46:11,666 INFO L87 Difference]: Start difference. First operand 15553 states and 66127 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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) [2021-08-12 19:46:12,988 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-08-12 19:46:45,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:46:45,942 INFO L93 Difference]: Finished difference Result 59587 states and 244413 transitions. [2021-08-12 19:46:45,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-12 19:46:45,944 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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 34 [2021-08-12 19:46:45,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:46:46,154 INFO L225 Difference]: With dead ends: 59587 [2021-08-12 19:46:46,155 INFO L226 Difference]: Without dead ends: 58310 [2021-08-12 19:46:46,172 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1153.1ms TimeCoverageRelationStatistics Valid=430, Invalid=1826, Unknown=0, NotChecked=0, Total=2256 [2021-08-12 19:46:46,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58310 states. [2021-08-12 19:46:50,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58310 to 21722. [2021-08-12 19:46:50,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21722 states, 21721 states have (on average 4.3382440955757104) internal successors, (94231), 21721 states have internal predecessors, (94231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:46:50,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21722 states to 21722 states and 94231 transitions. [2021-08-12 19:46:50,738 INFO L78 Accepts]: Start accepts. Automaton has 21722 states and 94231 transitions. Word has length 34 [2021-08-12 19:46:50,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:46:50,738 INFO L482 AbstractCegarLoop]: Abstraction has 21722 states and 94231 transitions. [2021-08-12 19:46:50,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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) [2021-08-12 19:46:50,738 INFO L276 IsEmpty]: Start isEmpty. Operand 21722 states and 94231 transitions. [2021-08-12 19:46:50,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:46:50,774 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:46:50,774 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:46:50,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-12 19:46:50,975 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:46:50,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:46:50,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1390644577, now seen corresponding path program 24 times [2021-08-12 19:46:50,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:46:50,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330724388] [2021-08-12 19:46:50,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:46:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:46:51,042 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:46:51,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:46:51,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330724388] [2021-08-12 19:46:51,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330724388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:46:51,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233949106] [2021-08-12 19:46:51,042 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 [2021-08-12 19:46:51,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:46:51,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:46:51,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 19:46:51,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:46:51,115 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 13 treesize of output 9 [2021-08-12 19:46:51,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:46:51,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:46:51,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:46:51,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2021-08-12 19:46:51,198 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-12 19:46:51,198 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-12 19:46:51,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:46:51,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:46:51,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:46:51,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-08-12 19:46:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:46:51,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233949106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:46:51,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:46:51,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:46:51,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128280459] [2021-08-12 19:46:51,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:46:51,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:46:51,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:46:51,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:46:51,218 INFO L87 Difference]: Start difference. First operand 21722 states and 94231 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:47:09,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:47:09,001 INFO L93 Difference]: Finished difference Result 29629 states and 125063 transitions. [2021-08-12 19:47:09,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:47:09,002 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-12 19:47:09,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:47:09,102 INFO L225 Difference]: With dead ends: 29629 [2021-08-12 19:47:09,103 INFO L226 Difference]: Without dead ends: 29380 [2021-08-12 19:47:09,110 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 245.0ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:47:09,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29380 states. [2021-08-12 19:47:13,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29380 to 21760. [2021-08-12 19:47:13,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21760 states, 21759 states have (on average 4.339078082632474) internal successors, (94414), 21759 states have internal predecessors, (94414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:47:13,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21760 states to 21760 states and 94414 transitions. [2021-08-12 19:47:13,361 INFO L78 Accepts]: Start accepts. Automaton has 21760 states and 94414 transitions. Word has length 34 [2021-08-12 19:47:13,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:47:13,361 INFO L482 AbstractCegarLoop]: Abstraction has 21760 states and 94414 transitions. [2021-08-12 19:47:13,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:47:13,361 INFO L276 IsEmpty]: Start isEmpty. Operand 21760 states and 94414 transitions. [2021-08-12 19:47:13,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:47:13,400 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:47:13,400 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:47:13,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:47:13,601 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:47:13,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:47:13,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1360942373, now seen corresponding path program 25 times [2021-08-12 19:47:13,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:47:13,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66664800] [2021-08-12 19:47:13,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:47:13,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:47:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:47:13,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:47:13,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66664800] [2021-08-12 19:47:13,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66664800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:47:13,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217756562] [2021-08-12 19:47:13,664 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 [2021-08-12 19:47:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:47:13,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:47:13,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:47:13,743 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 13 treesize of output 9 [2021-08-12 19:47:13,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:47:13,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:47:13,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:47:13,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2021-08-12 19:47:13,821 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-12 19:47:13,821 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-12 19:47:13,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:47:13,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:47:13,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:47:13,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-08-12 19:47:13,840 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:47:13,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217756562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:47:13,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:47:13,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:47:13,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481831709] [2021-08-12 19:47:13,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:47:13,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:47:13,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:47:13,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:47:13,841 INFO L87 Difference]: Start difference. First operand 21760 states and 94414 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:47:34,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:47:34,171 INFO L93 Difference]: Finished difference Result 32324 states and 135248 transitions. [2021-08-12 19:47:34,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:47:34,172 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-12 19:47:34,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:47:34,289 INFO L225 Difference]: With dead ends: 32324 [2021-08-12 19:47:34,289 INFO L226 Difference]: Without dead ends: 32075 [2021-08-12 19:47:34,299 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 240.3ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:47:34,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32075 states. [2021-08-12 19:47:38,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32075 to 22027. [2021-08-12 19:47:38,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22027 states, 22026 states have (on average 4.337691818759648) internal successors, (95542), 22026 states have internal predecessors, (95542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:47:38,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22027 states to 22027 states and 95542 transitions. [2021-08-12 19:47:38,847 INFO L78 Accepts]: Start accepts. Automaton has 22027 states and 95542 transitions. Word has length 34 [2021-08-12 19:47:38,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:47:38,847 INFO L482 AbstractCegarLoop]: Abstraction has 22027 states and 95542 transitions. [2021-08-12 19:47:38,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:47:38,848 INFO L276 IsEmpty]: Start isEmpty. Operand 22027 states and 95542 transitions. [2021-08-12 19:47:38,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 19:47:38,885 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:47:38,885 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:47:39,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-12 19:47:39,093 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:47:39,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:47:39,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1393308049, now seen corresponding path program 26 times [2021-08-12 19:47:39,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:47:39,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249626796] [2021-08-12 19:47:39,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:47:39,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:47:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-12 19:47:39,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:47:39,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249626796] [2021-08-12 19:47:39,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249626796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:47:39,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913593414] [2021-08-12 19:47:39,117 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 [2021-08-12 19:47:39,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:47:39,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:47:39,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-12 19:47:39,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:47:39,223 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-12 19:47:39,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913593414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:47:39,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:47:39,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-08-12 19:47:39,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807768447] [2021-08-12 19:47:39,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:47:39,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:47:39,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:47:39,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:47:39,224 INFO L87 Difference]: Start difference. First operand 22027 states and 95542 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 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) [2021-08-12 19:48:03,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:48:03,983 INFO L93 Difference]: Finished difference Result 45903 states and 195729 transitions. [2021-08-12 19:48:03,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:48:03,983 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 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 36 [2021-08-12 19:48:03,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:48:04,138 INFO L225 Difference]: With dead ends: 45903 [2021-08-12 19:48:04,138 INFO L226 Difference]: Without dead ends: 42784 [2021-08-12 19:48:04,154 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:48:04,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42784 states. [2021-08-12 19:48:11,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42784 to 34955. [2021-08-12 19:48:11,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34955 states, 34954 states have (on average 4.434056188132975) internal successors, (154988), 34954 states have internal predecessors, (154988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:48:11,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34955 states to 34955 states and 154988 transitions. [2021-08-12 19:48:11,573 INFO L78 Accepts]: Start accepts. Automaton has 34955 states and 154988 transitions. Word has length 36 [2021-08-12 19:48:11,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:48:11,573 INFO L482 AbstractCegarLoop]: Abstraction has 34955 states and 154988 transitions. [2021-08-12 19:48:11,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 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) [2021-08-12 19:48:11,573 INFO L276 IsEmpty]: Start isEmpty. Operand 34955 states and 154988 transitions. [2021-08-12 19:48:11,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-12 19:48:11,647 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:48:11,647 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:48:11,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-12 19:48:11,861 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:48:11,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:48:11,865 INFO L82 PathProgramCache]: Analyzing trace with hash 860471134, now seen corresponding path program 6 times [2021-08-12 19:48:12,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:48:12,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52315901] [2021-08-12 19:48:12,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:48:12,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:48:12,095 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:48:12,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:48:12,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52315901] [2021-08-12 19:48:12,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52315901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:48:12,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364553661] [2021-08-12 19:48:12,095 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 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 [2021-08-12 19:48:12,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:48:12,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:48:12,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 19:48:12,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:48:12,206 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:48:12,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364553661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:48:12,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:48:12,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-08-12 19:48:12,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129434675] [2021-08-12 19:48:12,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:48:12,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:48:12,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:48:12,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:48:12,207 INFO L87 Difference]: Start difference. First operand 34955 states and 154988 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:48:42,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:48:42,103 INFO L93 Difference]: Finished difference Result 59675 states and 262937 transitions. [2021-08-12 19:48:42,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:48:42,104 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-12 19:48:42,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:48:42,318 INFO L225 Difference]: With dead ends: 59675 [2021-08-12 19:48:42,318 INFO L226 Difference]: Without dead ends: 54701 [2021-08-12 19:48:42,338 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:48:42,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54701 states. [2021-08-12 19:48:52,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54701 to 49555. [2021-08-12 19:48:52,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49555 states, 49554 states have (on average 4.447673245348509) internal successors, (220400), 49554 states have internal predecessors, (220400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:48:52,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49555 states to 49555 states and 220400 transitions. [2021-08-12 19:48:52,830 INFO L78 Accepts]: Start accepts. Automaton has 49555 states and 220400 transitions. Word has length 38 [2021-08-12 19:48:52,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:48:52,831 INFO L482 AbstractCegarLoop]: Abstraction has 49555 states and 220400 transitions. [2021-08-12 19:48:52,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:48:52,831 INFO L276 IsEmpty]: Start isEmpty. Operand 49555 states and 220400 transitions. [2021-08-12 19:48:53,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:48:53,105 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:48:53,105 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:48:53,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:48:53,321 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:48:53,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:48:53,321 INFO L82 PathProgramCache]: Analyzing trace with hash -776500820, now seen corresponding path program 7 times [2021-08-12 19:48:53,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:48:53,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167281222] [2021-08-12 19:48:53,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:48:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:48:53,441 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:48:53,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:48:53,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167281222] [2021-08-12 19:48:53,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167281222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:48:53,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067519099] [2021-08-12 19:48:53,441 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 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 [2021-08-12 19:48:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:48:53,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 19:48:53,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:48:53,780 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-12 19:48:53,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 20 [2021-08-12 19:48:53,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:48:53,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:48:53,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:48:53,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:3 [2021-08-12 19:48:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:48:53,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067519099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:48:53,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:48:53,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:48:53,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116793642] [2021-08-12 19:48:53,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:48:53,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:48:53,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:48:53,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:48:53,806 INFO L87 Difference]: Start difference. First operand 49555 states and 220400 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 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) [2021-08-12 19:49:35,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:49:35,139 INFO L93 Difference]: Finished difference Result 66875 states and 289417 transitions. [2021-08-12 19:49:35,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:49:35,140 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 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 39 [2021-08-12 19:49:35,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:49:35,406 INFO L225 Difference]: With dead ends: 66875 [2021-08-12 19:49:35,406 INFO L226 Difference]: Without dead ends: 64441 [2021-08-12 19:49:35,426 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 759.8ms TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:49:35,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64441 states. [2021-08-12 19:49:46,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64441 to 50807. [2021-08-12 19:49:46,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50807 states, 50806 states have (on average 4.431996220918789) internal successors, (225172), 50806 states have internal predecessors, (225172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:49:47,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50807 states to 50807 states and 225172 transitions. [2021-08-12 19:49:47,194 INFO L78 Accepts]: Start accepts. Automaton has 50807 states and 225172 transitions. Word has length 39 [2021-08-12 19:49:47,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:49:47,194 INFO L482 AbstractCegarLoop]: Abstraction has 50807 states and 225172 transitions. [2021-08-12 19:49:47,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 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) [2021-08-12 19:49:47,194 INFO L276 IsEmpty]: Start isEmpty. Operand 50807 states and 225172 transitions. [2021-08-12 19:49:47,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:49:47,293 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:49:47,293 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:49:47,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-12 19:49:47,493 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:49:47,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:49:47,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1317826417, now seen corresponding path program 27 times [2021-08-12 19:49:47,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:49:47,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587220258] [2021-08-12 19:49:47,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:49:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:49:47,580 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:49:47,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:49:47,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587220258] [2021-08-12 19:49:47,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587220258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:49:47,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874459459] [2021-08-12 19:49:47,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:49:47,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:49:47,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:49:47,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 19:49:47,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:49:47,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:49:47,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:49:47,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:49:47,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:49:47,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 67 [2021-08-12 19:49:47,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-08-12 19:49:47,951 INFO L628 ElimStorePlain]: treesize reduction 122, result has 26.5 percent of original size [2021-08-12 19:49:47,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 19:49:47,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:79, output treesize:40 [2021-08-12 19:49:48,033 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 27 treesize of output 21 [2021-08-12 19:49:48,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:49:48,039 INFO L628 ElimStorePlain]: treesize reduction 6, result has 60.0 percent of original size [2021-08-12 19:49:48,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:49:48,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:9 [2021-08-12 19:49:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:49:48,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874459459] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:49:48,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:49:48,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-08-12 19:49:48,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395228228] [2021-08-12 19:49:48,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:49:48,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:49:48,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:49:48,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:49:48,070 INFO L87 Difference]: Start difference. First operand 50807 states and 225172 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 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) Received shutdown request... [2021-08-12 19:51:14,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-12 19:51:14,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:51:14,765 WARN L547 AbstractCegarLoop]: Verification canceled [2021-08-12 19:51:14,767 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-12 19:51:14,768 WARN L188 ceAbstractionStarter]: Timeout [2021-08-12 19:51:14,768 INFO L202 PluginConnector]: Adding new model buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.08 07:51:14 BasicIcfg [2021-08-12 19:51:14,768 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-12 19:51:14,769 INFO L168 Benchmark]: Toolchain (without parser) took 559415.71 ms. Allocated memory was 185.6 MB in the beginning and 3.6 GB in the end (delta: 3.4 GB). Free memory was 165.5 MB in the beginning and 1.5 GB in the end (delta: -1.3 GB). Peak memory consumption was 2.8 GB. Max. memory is 8.0 GB. [2021-08-12 19:51:14,769 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 185.6 MB. Free memory is still 166.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 19:51:14,769 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.25 ms. Allocated memory is still 185.6 MB. Free memory was 165.4 MB in the beginning and 163.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-12 19:51:14,769 INFO L168 Benchmark]: Boogie Preprocessor took 17.39 ms. Allocated memory is still 185.6 MB. Free memory was 163.9 MB in the beginning and 162.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 19:51:14,769 INFO L168 Benchmark]: RCFGBuilder took 258.33 ms. Allocated memory is still 185.6 MB. Free memory was 162.8 MB in the beginning and 147.0 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-08-12 19:51:14,769 INFO L168 Benchmark]: TraceAbstraction took 559114.75 ms. Allocated memory was 185.6 MB in the beginning and 3.6 GB in the end (delta: 3.4 GB). Free memory was 146.5 MB in the beginning and 1.5 GB in the end (delta: -1.3 GB). Peak memory consumption was 2.8 GB. Max. memory is 8.0 GB. [2021-08-12 19:51:14,769 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 0.11 ms. Allocated memory is still 185.6 MB. Free memory is still 166.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 21.25 ms. Allocated memory is still 185.6 MB. Free memory was 165.4 MB in the beginning and 163.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 17.39 ms. Allocated memory is still 185.6 MB. Free memory was 163.9 MB in the beginning and 162.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 258.33 ms. Allocated memory is still 185.6 MB. Free memory was 162.8 MB in the beginning and 147.0 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 559114.75 ms. Allocated memory was 185.6 MB in the beginning and 3.6 GB in the end (delta: 3.4 GB). Free memory was 146.5 MB in the beginning and 1.5 GB in the end (delta: -1.3 GB). Peak memory consumption was 2.8 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (50807states) and FLOYD_HOARE automaton (currently 43 states, 21 states before enhancement),while ReachableStatesComputation was computing reachable states (102535 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 54 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 559029.3ms, OverallIterations: 37, TraceHistogramMax: 5, EmptinessCheckTime: 1155.9ms, AutomataDifference: 462276.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 142.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4227 SDtfs, 10463 SDslu, 32450 SDs, 0 SdLazy, 18979 SolverSat, 776 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7608.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1730 GetRequests, 955 SyntacticMatches, 24 SemanticMatches, 751 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3980 ImplicationChecksByTransitivity, 11811.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=50807occurred in iteration=36, InterpolantAutomatonStates: 555, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 77365.4ms AutomataMinimizationTime, 36 MinimizatonAttempts, 412453 StatesRemovedByMinimization, 35 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 195.0ms SsaConstructionTime, 612.7ms SatisfiabilityAnalysisTime, 8207.7ms InterpolantComputationTime, 2357 NumberOfCodeBlocks, 2357 NumberOfCodeBlocksAsserted, 120 NumberOfCheckSat, 2285 ConstructedInterpolants, 26 QuantifiedInterpolants, 28890 SizeOfPredicates, 130 NumberOfNonLiveVariables, 3624 ConjunctsInSsa, 584 ConjunctsInUnsatCore, 72 InterpolantComputations, 3 PerfectInterpolantSequences, 138/847 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