/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-more/array-sum-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:21:53,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:21:53,463 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:21:53,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:21:53,535 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 [2021-07-13 20:21:53,567 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:21:53,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:21:53,569 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:21:53,569 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:21:53,571 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:21:53,571 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:21:53,572 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:21:53,572 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:21:53,572 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:21:53,572 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:21:53,573 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:21:53,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:21:53,573 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:21:53,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:21:53,573 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:21:53,573 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:21:53,574 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:21:53,574 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:21:53,574 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:21:53,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:21:53,574 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:21:53,574 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:21:53,574 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:21:53,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:21:53,575 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:21:53,575 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:21:53,575 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:21:53,575 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:21:53,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:21:53,575 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:21:53,576 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:21:53,576 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:21:53,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:21:53,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:21:53,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:21:53,903 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:21:53,904 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:21:53,904 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum-alt.wvr.bpl [2021-07-13 20:21:53,904 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum-alt.wvr.bpl' [2021-07-13 20:21:53,933 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:21:53,934 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:21:53,939 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:21:53,939 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:21:53,939 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:21:53,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:21:53" (1/1) ... [2021-07-13 20:21:53,958 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:21:53" (1/1) ... [2021-07-13 20:21:53,965 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:21:53,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:21:53,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:21:53,968 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:21:53,974 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:21:53" (1/1) ... [2021-07-13 20:21:53,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:21:53" (1/1) ... [2021-07-13 20:21:53,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:21:53" (1/1) ... [2021-07-13 20:21:53,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:21:53" (1/1) ... [2021-07-13 20:21:53,977 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:21:53" (1/1) ... [2021-07-13 20:21:53,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:21:53" (1/1) ... [2021-07-13 20:21:53,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:21:53" (1/1) ... [2021-07-13 20:21:53,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:21:53,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:21:53,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:21:53,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:21:53,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:21:53" (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 [2021-07-13 20:21:54,039 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:21:54,039 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:21:54,039 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:21:54,039 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:21:54,040 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:21:54,040 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:21:54,040 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:21:54,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:21:54,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:21:54,040 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 20:21:54,040 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 20:21:54,041 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 20:21:54,042 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:21:54,183 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:21:54,183 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:21:54,185 INFO L202 PluginConnector]: Adding new model array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:21:54 BoogieIcfgContainer [2021-07-13 20:21:54,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:21:54,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:21:54,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:21:54,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:21:54,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:21:53" (1/2) ... [2021-07-13 20:21:54,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54a30ef7 and model type array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:21:54, skipping insertion in model container [2021-07-13 20:21:54,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:21:54" (2/2) ... [2021-07-13 20:21:54,191 INFO L111 eAbstractionObserver]: Analyzing ICFG array-sum-alt.wvr.bpl [2021-07-13 20:21:54,196 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:21:54,196 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:21:54,196 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:21:54,196 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:21:54,230 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-13 20:21:54,253 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-13 20:21:54,287 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:21:54,287 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:21:54,287 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:21:54,288 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:21:54,288 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:21:54,288 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:21:54,288 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:21:54,288 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:21:54,297 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2021-07-13 20:21:54,337 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:54,341 INFO L276 IsEmpty]: Start isEmpty. Operand has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:54,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 20:21:54,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:54,354 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:54,354 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:54,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:54,359 INFO L82 PathProgramCache]: Analyzing trace with hash -2112338189, now seen corresponding path program 1 times [2021-07-13 20:21:54,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:54,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589606923] [2021-07-13 20:21:54,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:54,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:54,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:54,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:54,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589606923] [2021-07-13 20:21:54,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589606923] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:21:54,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:21:54,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:21:54,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593441648] [2021-07-13 20:21:54,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:21:54,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:54,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:21:54,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:21:54,599 INFO L87 Difference]: Start difference. First operand has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 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 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:54,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:54,658 INFO L93 Difference]: Finished difference Result 298 states and 858 transitions. [2021-07-13 20:21:54,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:21:54,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 20:21:54,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:54,687 INFO L225 Difference]: With dead ends: 298 [2021-07-13 20:21:54,688 INFO L226 Difference]: Without dead ends: 283 [2021-07-13 20:21:54,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:21:54,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-07-13 20:21:54,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2021-07-13 20:21:54,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.8820960698689957) internal successors, (660), 229 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:54,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 660 transitions. [2021-07-13 20:21:54,776 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 660 transitions. Word has length 18 [2021-07-13 20:21:54,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:54,779 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 660 transitions. [2021-07-13 20:21:54,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:54,780 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 660 transitions. [2021-07-13 20:21:54,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:21:54,785 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:54,785 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:54,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:21:54,785 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:54,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:54,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1377866598, now seen corresponding path program 1 times [2021-07-13 20:21:54,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:54,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693855924] [2021-07-13 20:21:54,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:54,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:54,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693855924] [2021-07-13 20:21:54,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693855924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:54,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795102676] [2021-07-13 20:21:54,922 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 [2021-07-13 20:21:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:54,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:21:54,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:55,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:55,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795102676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:55,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:55,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-13 20:21:55,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577317007] [2021-07-13 20:21:55,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:21:55,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:55,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:21:55,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:21:55,156 INFO L87 Difference]: Start difference. First operand 230 states and 660 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:55,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:55,545 INFO L93 Difference]: Finished difference Result 1019 states and 2933 transitions. [2021-07-13 20:21:55,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:21:55,546 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:21:55,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:55,554 INFO L225 Difference]: With dead ends: 1019 [2021-07-13 20:21:55,554 INFO L226 Difference]: Without dead ends: 1019 [2021-07-13 20:21:55,555 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 213.7ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:21:55,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2021-07-13 20:21:55,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 253. [2021-07-13 20:21:55,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.9523809523809526) internal successors, (744), 252 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:55,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 744 transitions. [2021-07-13 20:21:55,612 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 744 transitions. Word has length 21 [2021-07-13 20:21:55,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:55,613 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 744 transitions. [2021-07-13 20:21:55,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:55,614 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 744 transitions. [2021-07-13 20:21:55,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:21:55,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:55,616 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:55,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-13 20:21:55,840 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:55,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:55,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1571767266, now seen corresponding path program 2 times [2021-07-13 20:21:55,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:55,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623130616] [2021-07-13 20:21:55,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:55,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:55,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:55,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:55,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623130616] [2021-07-13 20:21:55,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623130616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:55,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488606859] [2021-07-13 20:21:55,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:55,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:21:55,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:55,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:21:55,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:56,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488606859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:56,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:56,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-13 20:21:56,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397382818] [2021-07-13 20:21:56,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:21:56,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:56,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:21:56,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:21:56,075 INFO L87 Difference]: Start difference. First operand 253 states and 744 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:56,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:56,418 INFO L93 Difference]: Finished difference Result 1035 states and 2973 transitions. [2021-07-13 20:21:56,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:21:56,419 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:21:56,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:56,426 INFO L225 Difference]: With dead ends: 1035 [2021-07-13 20:21:56,426 INFO L226 Difference]: Without dead ends: 1035 [2021-07-13 20:21:56,427 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 160.7ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:21:56,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2021-07-13 20:21:56,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 252. [2021-07-13 20:21:56,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.9362549800796813) internal successors, (737), 251 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:56,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 737 transitions. [2021-07-13 20:21:56,466 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 737 transitions. Word has length 21 [2021-07-13 20:21:56,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:56,466 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 737 transitions. [2021-07-13 20:21:56,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:56,467 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 737 transitions. [2021-07-13 20:21:56,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:21:56,468 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:56,468 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:56,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:56,681 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:56,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:56,682 INFO L82 PathProgramCache]: Analyzing trace with hash -120635141, now seen corresponding path program 1 times [2021-07-13 20:21:56,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:56,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194358058] [2021-07-13 20:21:56,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:56,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:56,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:56,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194358058] [2021-07-13 20:21:56,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194358058] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:21:56,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:21:56,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 20:21:56,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613628842] [2021-07-13 20:21:56,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:21:56,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:56,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:21:56,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:21:56,731 INFO L87 Difference]: Start difference. First operand 252 states and 737 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:56,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:56,808 INFO L93 Difference]: Finished difference Result 483 states and 1371 transitions. [2021-07-13 20:21:56,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:21:56,813 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:21:56,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:56,815 INFO L225 Difference]: With dead ends: 483 [2021-07-13 20:21:56,816 INFO L226 Difference]: Without dead ends: 477 [2021-07-13 20:21:56,816 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:21:56,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-07-13 20:21:56,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 327. [2021-07-13 20:21:56,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.941717791411043) internal successors, (959), 326 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:56,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 959 transitions. [2021-07-13 20:21:56,828 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 959 transitions. Word has length 21 [2021-07-13 20:21:56,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:56,828 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 959 transitions. [2021-07-13 20:21:56,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:56,831 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 959 transitions. [2021-07-13 20:21:56,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:21:56,832 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:56,832 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:56,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 20:21:56,833 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:56,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:56,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1682109104, now seen corresponding path program 1 times [2021-07-13 20:21:56,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:56,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419337732] [2021-07-13 20:21:56,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:56,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:56,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:56,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419337732] [2021-07-13 20:21:56,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419337732] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:21:56,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:21:56,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 20:21:56,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199620219] [2021-07-13 20:21:56,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:21:56,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:56,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:21:56,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:21:56,892 INFO L87 Difference]: Start difference. First operand 327 states and 959 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:56,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:56,978 INFO L93 Difference]: Finished difference Result 539 states and 1537 transitions. [2021-07-13 20:21:56,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:21:56,978 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:21:56,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:56,981 INFO L225 Difference]: With dead ends: 539 [2021-07-13 20:21:56,981 INFO L226 Difference]: Without dead ends: 521 [2021-07-13 20:21:56,981 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:21:56,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-07-13 20:21:56,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 398. [2021-07-13 20:21:56,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.929471032745592) internal successors, (1163), 397 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:56,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1163 transitions. [2021-07-13 20:21:56,994 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1163 transitions. Word has length 21 [2021-07-13 20:21:56,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:56,994 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 1163 transitions. [2021-07-13 20:21:56,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:56,995 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1163 transitions. [2021-07-13 20:21:56,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:21:56,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:56,996 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:56,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 20:21:56,996 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:56,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:56,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1479238087, now seen corresponding path program 2 times [2021-07-13 20:21:56,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:56,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233009655] [2021-07-13 20:21:56,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:57,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:57,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:57,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233009655] [2021-07-13 20:21:57,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233009655] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:21:57,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:21:57,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 20:21:57,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781793329] [2021-07-13 20:21:57,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:21:57,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:57,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:21:57,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:21:57,029 INFO L87 Difference]: Start difference. First operand 398 states and 1163 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:57,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:57,073 INFO L93 Difference]: Finished difference Result 486 states and 1392 transitions. [2021-07-13 20:21:57,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:21:57,075 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:21:57,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:57,078 INFO L225 Difference]: With dead ends: 486 [2021-07-13 20:21:57,078 INFO L226 Difference]: Without dead ends: 486 [2021-07-13 20:21:57,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:21:57,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-07-13 20:21:57,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 362. [2021-07-13 20:21:57,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.9418282548476453) internal successors, (1062), 361 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:57,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1062 transitions. [2021-07-13 20:21:57,089 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1062 transitions. Word has length 21 [2021-07-13 20:21:57,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:57,090 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 1062 transitions. [2021-07-13 20:21:57,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:57,090 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1062 transitions. [2021-07-13 20:21:57,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:21:57,091 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:57,091 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:57,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-13 20:21:57,091 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:57,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:57,092 INFO L82 PathProgramCache]: Analyzing trace with hash -314434059, now seen corresponding path program 3 times [2021-07-13 20:21:57,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:57,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278164830] [2021-07-13 20:21:57,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:57,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:57,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:57,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278164830] [2021-07-13 20:21:57,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278164830] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:21:57,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:21:57,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 20:21:57,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124183001] [2021-07-13 20:21:57,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:21:57,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:57,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:21:57,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:21:57,130 INFO L87 Difference]: Start difference. First operand 362 states and 1062 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:57,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:57,201 INFO L93 Difference]: Finished difference Result 438 states and 1246 transitions. [2021-07-13 20:21:57,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:21:57,203 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:21:57,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:57,208 INFO L225 Difference]: With dead ends: 438 [2021-07-13 20:21:57,208 INFO L226 Difference]: Without dead ends: 438 [2021-07-13 20:21:57,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:21:57,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-07-13 20:21:57,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 323. [2021-07-13 20:21:57,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.8975155279503104) internal successors, (933), 322 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:57,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 933 transitions. [2021-07-13 20:21:57,219 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 933 transitions. Word has length 21 [2021-07-13 20:21:57,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:57,220 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 933 transitions. [2021-07-13 20:21:57,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:57,220 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 933 transitions. [2021-07-13 20:21:57,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:21:57,221 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:57,221 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:57,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-13 20:21:57,221 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:57,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:57,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1825817224, now seen corresponding path program 3 times [2021-07-13 20:21:57,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:57,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830571516] [2021-07-13 20:21:57,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:57,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:57,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:57,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830571516] [2021-07-13 20:21:57,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830571516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:57,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407716266] [2021-07-13 20:21:57,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:57,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:21:57,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:57,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:21:57,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:57,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:57,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407716266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:57,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:57,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:21:57,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209211706] [2021-07-13 20:21:57,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:21:57,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:57,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:21:57,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:21:57,389 INFO L87 Difference]: Start difference. First operand 323 states and 933 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:57,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:57,671 INFO L93 Difference]: Finished difference Result 994 states and 2769 transitions. [2021-07-13 20:21:57,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:21:57,672 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:21:57,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:57,677 INFO L225 Difference]: With dead ends: 994 [2021-07-13 20:21:57,677 INFO L226 Difference]: Without dead ends: 994 [2021-07-13 20:21:57,678 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 148.4ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:21:57,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-07-13 20:21:57,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 323. [2021-07-13 20:21:57,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.8975155279503104) internal successors, (933), 322 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:57,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 933 transitions. [2021-07-13 20:21:57,691 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 933 transitions. Word has length 21 [2021-07-13 20:21:57,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:57,691 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 933 transitions. [2021-07-13 20:21:57,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:57,691 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 933 transitions. [2021-07-13 20:21:57,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:21:57,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:57,693 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:57,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:57,913 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:57,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:57,913 INFO L82 PathProgramCache]: Analyzing trace with hash 156862832, now seen corresponding path program 2 times [2021-07-13 20:21:57,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:57,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695615751] [2021-07-13 20:21:57,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:57,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:57,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:57,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695615751] [2021-07-13 20:21:57,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695615751] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:21:57,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:21:57,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 20:21:57,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750130935] [2021-07-13 20:21:57,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:21:57,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:57,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:21:57,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:21:57,982 INFO L87 Difference]: Start difference. First operand 323 states and 933 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:58,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:58,131 INFO L93 Difference]: Finished difference Result 466 states and 1366 transitions. [2021-07-13 20:21:58,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:21:58,132 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:21:58,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:58,134 INFO L225 Difference]: With dead ends: 466 [2021-07-13 20:21:58,134 INFO L226 Difference]: Without dead ends: 466 [2021-07-13 20:21:58,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:21:58,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-07-13 20:21:58,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 276. [2021-07-13 20:21:58,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.92) internal successors, (803), 275 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:58,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 803 transitions. [2021-07-13 20:21:58,144 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 803 transitions. Word has length 21 [2021-07-13 20:21:58,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:58,144 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 803 transitions. [2021-07-13 20:21:58,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:58,144 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 803 transitions. [2021-07-13 20:21:58,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:21:58,145 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:58,145 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:58,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-13 20:21:58,146 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:58,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:58,146 INFO L82 PathProgramCache]: Analyzing trace with hash -2015035522, now seen corresponding path program 4 times [2021-07-13 20:21:58,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:58,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637279252] [2021-07-13 20:21:58,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:58,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:58,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:58,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637279252] [2021-07-13 20:21:58,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637279252] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:21:58,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:21:58,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 20:21:58,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70459830] [2021-07-13 20:21:58,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:21:58,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:58,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:21:58,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:21:58,177 INFO L87 Difference]: Start difference. First operand 276 states and 803 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:58,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:58,314 INFO L93 Difference]: Finished difference Result 541 states and 1520 transitions. [2021-07-13 20:21:58,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:21:58,314 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:21:58,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:58,317 INFO L225 Difference]: With dead ends: 541 [2021-07-13 20:21:58,317 INFO L226 Difference]: Without dead ends: 537 [2021-07-13 20:21:58,317 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:21:58,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-07-13 20:21:58,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 276. [2021-07-13 20:21:58,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.9127272727272726) internal successors, (801), 275 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:58,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 801 transitions. [2021-07-13 20:21:58,327 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 801 transitions. Word has length 21 [2021-07-13 20:21:58,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:58,327 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 801 transitions. [2021-07-13 20:21:58,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:58,327 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 801 transitions. [2021-07-13 20:21:58,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:21:58,328 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:58,328 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:58,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-13 20:21:58,328 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:58,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:58,329 INFO L82 PathProgramCache]: Analyzing trace with hash -625514306, now seen corresponding path program 5 times [2021-07-13 20:21:58,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:58,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834922172] [2021-07-13 20:21:58,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:58,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:58,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:58,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:58,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834922172] [2021-07-13 20:21:58,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834922172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:58,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744082924] [2021-07-13 20:21:58,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:58,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:21:58,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:58,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:21:58,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:58,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:58,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744082924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:58,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:58,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-13 20:21:58,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262054820] [2021-07-13 20:21:58,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:21:58,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:58,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:21:58,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:21:58,492 INFO L87 Difference]: Start difference. First operand 276 states and 801 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:58,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:58,711 INFO L93 Difference]: Finished difference Result 760 states and 2180 transitions. [2021-07-13 20:21:58,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:21:58,712 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:21:58,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:58,718 INFO L225 Difference]: With dead ends: 760 [2021-07-13 20:21:58,718 INFO L226 Difference]: Without dead ends: 760 [2021-07-13 20:21:58,719 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 108.9ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:21:58,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-07-13 20:21:58,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 278. [2021-07-13 20:21:58,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.916967509025271) internal successors, (808), 277 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:58,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 808 transitions. [2021-07-13 20:21:58,733 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 808 transitions. Word has length 21 [2021-07-13 20:21:58,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:58,733 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 808 transitions. [2021-07-13 20:21:58,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:58,733 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 808 transitions. [2021-07-13 20:21:58,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:21:58,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:58,734 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:21:58,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:58,958 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:58,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:58,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1157135164, now seen corresponding path program 6 times [2021-07-13 20:21:58,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:58,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976721522] [2021-07-13 20:21:58,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:59,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:59,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:59,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976721522] [2021-07-13 20:21:59,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976721522] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:21:59,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:21:59,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 20:21:59,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125927361] [2021-07-13 20:21:59,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:21:59,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:59,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:21:59,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:21:59,005 INFO L87 Difference]: Start difference. First operand 278 states and 808 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:59,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:59,084 INFO L93 Difference]: Finished difference Result 429 states and 1251 transitions. [2021-07-13 20:21:59,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:21:59,084 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:21:59,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:59,087 INFO L225 Difference]: With dead ends: 429 [2021-07-13 20:21:59,087 INFO L226 Difference]: Without dead ends: 425 [2021-07-13 20:21:59,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:21:59,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-07-13 20:21:59,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 278. [2021-07-13 20:21:59,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.9097472924187726) internal successors, (806), 277 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:59,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 806 transitions. [2021-07-13 20:21:59,095 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 806 transitions. Word has length 21 [2021-07-13 20:21:59,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:59,096 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 806 transitions. [2021-07-13 20:21:59,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:59,096 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 806 transitions. [2021-07-13 20:21:59,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:21:59,097 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:59,097 INFO L508 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] [2021-07-13 20:21:59,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-13 20:21:59,097 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:59,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:59,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1959126516, now seen corresponding path program 1 times [2021-07-13 20:21:59,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:59,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056570800] [2021-07-13 20:21:59,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:59,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:59,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:59,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056570800] [2021-07-13 20:21:59,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056570800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:59,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695649822] [2021-07-13 20:21:59,171 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 [2021-07-13 20:21:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:59,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:21:59,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:59,317 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 11 treesize of output 7 [2021-07-13 20:21:59,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:59,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:59,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:59,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-07-13 20:21:59,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:59,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695649822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:59,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:59,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-07-13 20:21:59,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427381530] [2021-07-13 20:21:59,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:21:59,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:59,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:21:59,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:21:59,365 INFO L87 Difference]: Start difference. First operand 278 states and 806 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:59,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:59,439 INFO L93 Difference]: Finished difference Result 552 states and 1614 transitions. [2021-07-13 20:21:59,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:21:59,439 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:21:59,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:59,442 INFO L225 Difference]: With dead ends: 552 [2021-07-13 20:21:59,443 INFO L226 Difference]: Without dead ends: 537 [2021-07-13 20:21:59,443 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:21:59,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-07-13 20:21:59,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 372. [2021-07-13 20:21:59,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.981132075471698) internal successors, (1106), 371 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:59,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1106 transitions. [2021-07-13 20:21:59,453 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1106 transitions. Word has length 24 [2021-07-13 20:21:59,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:59,454 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 1106 transitions. [2021-07-13 20:21:59,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:59,454 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1106 transitions. [2021-07-13 20:21:59,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:21:59,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:59,455 INFO L508 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] [2021-07-13 20:21:59,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-13 20:21:59,677 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:59,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:59,677 INFO L82 PathProgramCache]: Analyzing trace with hash 397652553, now seen corresponding path program 1 times [2021-07-13 20:21:59,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:59,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822929828] [2021-07-13 20:21:59,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:59,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:59,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:59,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822929828] [2021-07-13 20:21:59,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822929828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:59,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587526738] [2021-07-13 20:21:59,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:59,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:21:59,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:00,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:00,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:22:00,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:22:00,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:00,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:22:00,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:3 [2021-07-13 20:22:00,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:00,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587526738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:00,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:00,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2021-07-13 20:22:00,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753277591] [2021-07-13 20:22:00,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:22:00,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:00,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:22:00,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:22:00,133 INFO L87 Difference]: Start difference. First operand 372 states and 1106 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:00,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:00,599 INFO L93 Difference]: Finished difference Result 586 states and 1678 transitions. [2021-07-13 20:22:00,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:22:00,599 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:22:00,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:00,603 INFO L225 Difference]: With dead ends: 586 [2021-07-13 20:22:00,603 INFO L226 Difference]: Without dead ends: 571 [2021-07-13 20:22:00,603 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 475.2ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:22:00,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-07-13 20:22:00,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 438. [2021-07-13 20:22:00,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.954233409610984) internal successors, (1291), 437 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:00,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1291 transitions. [2021-07-13 20:22:00,615 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1291 transitions. Word has length 24 [2021-07-13 20:22:00,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:00,615 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1291 transitions. [2021-07-13 20:22:00,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:00,615 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1291 transitions. [2021-07-13 20:22:00,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:22:00,617 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:00,617 INFO L508 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] [2021-07-13 20:22:00,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:00,833 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:00,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:00,833 INFO L82 PathProgramCache]: Analyzing trace with hash 602801515, now seen corresponding path program 2 times [2021-07-13 20:22:00,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:00,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917447326] [2021-07-13 20:22:00,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:00,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:01,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:01,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:01,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917447326] [2021-07-13 20:22:01,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917447326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:01,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797880369] [2021-07-13 20:22:01,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:01,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:22:01,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:01,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:22:01,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:01,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:01,199 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 11 treesize of output 15 [2021-07-13 20:22:01,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:22:01,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:01,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:22:01,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:15 [2021-07-13 20:22:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:01,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797880369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:01,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:01,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2021-07-13 20:22:01,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940055640] [2021-07-13 20:22:01,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:22:01,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:01,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:22:01,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:22:01,307 INFO L87 Difference]: Start difference. First operand 438 states and 1291 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-07-13 20:22:01,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:01,830 INFO L93 Difference]: Finished difference Result 795 states and 2267 transitions. [2021-07-13 20:22:01,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:22:01,831 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 24 [2021-07-13 20:22:01,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:01,835 INFO L225 Difference]: With dead ends: 795 [2021-07-13 20:22:01,835 INFO L226 Difference]: Without dead ends: 780 [2021-07-13 20:22:01,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 550.1ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:22:01,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-07-13 20:22:01,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 439. [2021-07-13 20:22:01,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.958904109589041) internal successors, (1296), 438 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:01,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1296 transitions. [2021-07-13 20:22:01,849 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1296 transitions. Word has length 24 [2021-07-13 20:22:01,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:01,849 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 1296 transitions. [2021-07-13 20:22:01,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-07-13 20:22:01,850 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1296 transitions. [2021-07-13 20:22:01,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:22:01,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:01,851 INFO L508 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] [2021-07-13 20:22:02,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 20:22:02,065 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:02,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:02,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1941464708, now seen corresponding path program 2 times [2021-07-13 20:22:02,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:02,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745975316] [2021-07-13 20:22:02,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:02,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:02,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745975316] [2021-07-13 20:22:02,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745975316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:02,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560982262] [2021-07-13 20:22:02,117 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 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 [2021-07-13 20:22:02,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:22:02,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:02,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:22:02,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:02,214 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 [2021-07-13 20:22:02,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:22:02,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:02,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:22:02,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-07-13 20:22:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:02,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560982262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:02,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:02,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 20:22:02,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242113532] [2021-07-13 20:22:02,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:22:02,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:02,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:22:02,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:22:02,274 INFO L87 Difference]: Start difference. First operand 439 states and 1296 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:02,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:02,347 INFO L93 Difference]: Finished difference Result 645 states and 1906 transitions. [2021-07-13 20:22:02,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:22:02,348 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:22:02,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:02,351 INFO L225 Difference]: With dead ends: 645 [2021-07-13 20:22:02,351 INFO L226 Difference]: Without dead ends: 630 [2021-07-13 20:22:02,351 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:22:02,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-07-13 20:22:02,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 471. [2021-07-13 20:22:02,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.9617021276595743) internal successors, (1392), 470 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:02,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1392 transitions. [2021-07-13 20:22:02,377 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1392 transitions. Word has length 24 [2021-07-13 20:22:02,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:02,377 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1392 transitions. [2021-07-13 20:22:02,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:02,377 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1392 transitions. [2021-07-13 20:22:02,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:22:02,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:02,379 INFO L508 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] [2021-07-13 20:22:02,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 20:22:02,601 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:02,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:02,601 INFO L82 PathProgramCache]: Analyzing trace with hash -745990585, now seen corresponding path program 3 times [2021-07-13 20:22:02,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:02,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389669041] [2021-07-13 20:22:02,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:02,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:02,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:02,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389669041] [2021-07-13 20:22:02,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389669041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:02,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847222501] [2021-07-13 20:22:02,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:02,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:22:02,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:02,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:22:02,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:02,928 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 [2021-07-13 20:22:02,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:22:02,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:02,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:22:02,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:3 [2021-07-13 20:22:02,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:02,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847222501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:02,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:02,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 12 [2021-07-13 20:22:02,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253500305] [2021-07-13 20:22:02,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:22:02,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:02,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:22:02,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:22:02,975 INFO L87 Difference]: Start difference. First operand 471 states and 1392 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-07-13 20:22:03,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:03,193 INFO L93 Difference]: Finished difference Result 592 states and 1679 transitions. [2021-07-13 20:22:03,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:22:03,193 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 24 [2021-07-13 20:22:03,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:03,196 INFO L225 Difference]: With dead ends: 592 [2021-07-13 20:22:03,196 INFO L226 Difference]: Without dead ends: 577 [2021-07-13 20:22:03,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 297.3ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:22:03,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-07-13 20:22:03,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 465. [2021-07-13 20:22:03,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.9547413793103448) internal successors, (1371), 464 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:03,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1371 transitions. [2021-07-13 20:22:03,209 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1371 transitions. Word has length 24 [2021-07-13 20:22:03,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:03,209 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1371 transitions. [2021-07-13 20:22:03,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-07-13 20:22:03,209 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1371 transitions. [2021-07-13 20:22:03,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:22:03,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:03,211 INFO L508 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] [2021-07-13 20:22:03,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 20:22:03,433 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:03,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:03,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1226467769, now seen corresponding path program 4 times [2021-07-13 20:22:03,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:03,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577839630] [2021-07-13 20:22:03,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:03,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:03,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:03,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577839630] [2021-07-13 20:22:03,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577839630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:03,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675604332] [2021-07-13 20:22:03,593 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 [2021-07-13 20:22:03,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:22:03,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:03,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:22:03,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:03,740 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 [2021-07-13 20:22:03,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:22:03,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:03,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:22:03,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:3 [2021-07-13 20:22:03,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:03,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675604332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:03,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:03,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-13 20:22:03,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501512898] [2021-07-13 20:22:03,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:22:03,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:03,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:22:03,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:22:03,773 INFO L87 Difference]: Start difference. First operand 465 states and 1371 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:03,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:03,958 INFO L93 Difference]: Finished difference Result 683 states and 1988 transitions. [2021-07-13 20:22:03,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:22:03,959 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:22:03,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:03,962 INFO L225 Difference]: With dead ends: 683 [2021-07-13 20:22:03,962 INFO L226 Difference]: Without dead ends: 668 [2021-07-13 20:22:03,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 274.0ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:22:03,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-07-13 20:22:03,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 469. [2021-07-13 20:22:03,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 2.950854700854701) internal successors, (1381), 468 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:03,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1381 transitions. [2021-07-13 20:22:03,975 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1381 transitions. Word has length 24 [2021-07-13 20:22:03,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:03,975 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1381 transitions. [2021-07-13 20:22:03,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:03,975 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1381 transitions. [2021-07-13 20:22:03,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:22:03,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:03,977 INFO L508 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] [2021-07-13 20:22:04,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:04,193 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:04,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:04,193 INFO L82 PathProgramCache]: Analyzing trace with hash 572535559, now seen corresponding path program 5 times [2021-07-13 20:22:04,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:04,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72123507] [2021-07-13 20:22:04,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:04,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:04,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:04,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:04,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72123507] [2021-07-13 20:22:04,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72123507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:04,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155896441] [2021-07-13 20:22:04,364 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 [2021-07-13 20:22:04,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:22:04,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:04,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:22:04,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:04,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:04,498 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 11 treesize of output 15 [2021-07-13 20:22:04,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:22:04,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:04,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:22:04,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:28 [2021-07-13 20:22:04,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:04,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155896441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:04,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:04,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:22:04,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213867594] [2021-07-13 20:22:04,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:22:04,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:04,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:22:04,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:22:04,610 INFO L87 Difference]: Start difference. First operand 469 states and 1381 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:04,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:04,999 INFO L93 Difference]: Finished difference Result 759 states and 2222 transitions. [2021-07-13 20:22:04,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:22:05,000 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:22:05,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:05,002 INFO L225 Difference]: With dead ends: 759 [2021-07-13 20:22:05,002 INFO L226 Difference]: Without dead ends: 744 [2021-07-13 20:22:05,003 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 407.4ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:22:05,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-07-13 20:22:05,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 471. [2021-07-13 20:22:05,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.9553191489361703) internal successors, (1389), 470 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:05,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1389 transitions. [2021-07-13 20:22:05,016 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1389 transitions. Word has length 24 [2021-07-13 20:22:05,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:05,016 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1389 transitions. [2021-07-13 20:22:05,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:05,016 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1389 transitions. [2021-07-13 20:22:05,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:05,017 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:05,018 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:05,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:05,240 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:05,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:05,241 INFO L82 PathProgramCache]: Analyzing trace with hash 606500413, now seen corresponding path program 3 times [2021-07-13 20:22:05,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:05,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934495569] [2021-07-13 20:22:05,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:05,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:05,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:05,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934495569] [2021-07-13 20:22:05,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934495569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:05,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469174905] [2021-07-13 20:22:05,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:05,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:22:05,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:05,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:05,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:05,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469174905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:05,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:05,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:22:05,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887784458] [2021-07-13 20:22:05,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:22:05,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:05,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:22:05,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:22:05,419 INFO L87 Difference]: Start difference. First operand 471 states and 1389 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:06,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:06,215 INFO L93 Difference]: Finished difference Result 2301 states and 6530 transitions. [2021-07-13 20:22:06,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:22:06,215 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:06,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:06,223 INFO L225 Difference]: With dead ends: 2301 [2021-07-13 20:22:06,223 INFO L226 Difference]: Without dead ends: 2301 [2021-07-13 20:22:06,224 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 413.2ms TimeCoverageRelationStatistics Valid=498, Invalid=1664, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:22:06,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-07-13 20:22:06,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 593. [2021-07-13 20:22:06,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.170608108108108) internal successors, (1877), 592 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:06,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1877 transitions. [2021-07-13 20:22:06,254 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1877 transitions. Word has length 27 [2021-07-13 20:22:06,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:06,254 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1877 transitions. [2021-07-13 20:22:06,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:06,254 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1877 transitions. [2021-07-13 20:22:06,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:06,256 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:06,256 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:06,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:06,478 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:06,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:06,479 INFO L82 PathProgramCache]: Analyzing trace with hash 412599745, now seen corresponding path program 4 times [2021-07-13 20:22:06,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:06,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809119997] [2021-07-13 20:22:06,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:06,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:06,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:06,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:06,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809119997] [2021-07-13 20:22:06,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809119997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:06,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913045572] [2021-07-13 20:22:06,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:06,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:22:06,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:06,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:06,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:06,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:06,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913045572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:06,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:06,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:22:06,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904597753] [2021-07-13 20:22:06,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:22:06,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:06,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:22:06,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:22:06,691 INFO L87 Difference]: Start difference. First operand 593 states and 1877 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:07,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:07,435 INFO L93 Difference]: Finished difference Result 2258 states and 6445 transitions. [2021-07-13 20:22:07,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:22:07,436 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:07,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:07,445 INFO L225 Difference]: With dead ends: 2258 [2021-07-13 20:22:07,445 INFO L226 Difference]: Without dead ends: 2258 [2021-07-13 20:22:07,446 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 458.6ms TimeCoverageRelationStatistics Valid=525, Invalid=1731, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:22:07,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2258 states. [2021-07-13 20:22:07,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2258 to 577. [2021-07-13 20:22:07,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 3.1354166666666665) internal successors, (1806), 576 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:07,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1806 transitions. [2021-07-13 20:22:07,473 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1806 transitions. Word has length 27 [2021-07-13 20:22:07,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:07,473 INFO L482 AbstractCegarLoop]: Abstraction has 577 states and 1806 transitions. [2021-07-13 20:22:07,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:07,474 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1806 transitions. [2021-07-13 20:22:07,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:07,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:07,475 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:07,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-13 20:22:07,697 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:07,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:07,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1028264061, now seen corresponding path program 5 times [2021-07-13 20:22:07,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:07,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016294608] [2021-07-13 20:22:07,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:07,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:07,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016294608] [2021-07-13 20:22:07,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016294608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:07,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251052338] [2021-07-13 20:22:07,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:07,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:22:07,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:07,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:07,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:07,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:07,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251052338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:07,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:07,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:22:07,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002519505] [2021-07-13 20:22:07,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:22:07,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:07,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:22:07,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:22:07,877 INFO L87 Difference]: Start difference. First operand 577 states and 1806 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:08,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:08,296 INFO L93 Difference]: Finished difference Result 1609 states and 4647 transitions. [2021-07-13 20:22:08,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:22:08,297 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:08,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:08,303 INFO L225 Difference]: With dead ends: 1609 [2021-07-13 20:22:08,303 INFO L226 Difference]: Without dead ends: 1609 [2021-07-13 20:22:08,304 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 227.5ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:22:08,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2021-07-13 20:22:08,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 585. [2021-07-13 20:22:08,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 3.125) internal successors, (1825), 584 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:08,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1825 transitions. [2021-07-13 20:22:08,327 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1825 transitions. Word has length 27 [2021-07-13 20:22:08,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:08,327 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1825 transitions. [2021-07-13 20:22:08,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:08,327 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1825 transitions. [2021-07-13 20:22:08,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:08,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:08,329 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:08,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:08,549 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:08,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:08,549 INFO L82 PathProgramCache]: Analyzing trace with hash -954973550, now seen corresponding path program 6 times [2021-07-13 20:22:08,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:08,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721482794] [2021-07-13 20:22:08,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:08,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:08,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:08,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721482794] [2021-07-13 20:22:08,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721482794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:08,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167830209] [2021-07-13 20:22:08,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:08,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:22:08,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:08,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:08,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:08,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:08,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167830209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:08,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:08,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:22:08,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245323286] [2021-07-13 20:22:08,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:22:08,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:08,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:22:08,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:22:08,716 INFO L87 Difference]: Start difference. First operand 585 states and 1825 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:09,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:09,142 INFO L93 Difference]: Finished difference Result 1639 states and 4720 transitions. [2021-07-13 20:22:09,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:22:09,142 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:09,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:09,147 INFO L225 Difference]: With dead ends: 1639 [2021-07-13 20:22:09,147 INFO L226 Difference]: Without dead ends: 1639 [2021-07-13 20:22:09,148 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 225.5ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:22:09,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2021-07-13 20:22:09,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 596. [2021-07-13 20:22:09,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 3.104201680672269) internal successors, (1847), 595 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:09,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1847 transitions. [2021-07-13 20:22:09,168 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1847 transitions. Word has length 27 [2021-07-13 20:22:09,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:09,168 INFO L482 AbstractCegarLoop]: Abstraction has 596 states and 1847 transitions. [2021-07-13 20:22:09,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:09,168 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1847 transitions. [2021-07-13 20:22:09,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:09,170 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:09,170 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:09,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-13 20:22:09,385 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:09,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:09,385 INFO L82 PathProgramCache]: Analyzing trace with hash -535240646, now seen corresponding path program 6 times [2021-07-13 20:22:09,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:09,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071817557] [2021-07-13 20:22:09,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:09,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:09,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071817557] [2021-07-13 20:22:09,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071817557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:09,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707844059] [2021-07-13 20:22:09,416 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 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 [2021-07-13 20:22:09,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:22:09,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:09,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:22:09,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:09,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:09,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707844059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:09,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:09,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:22:09,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989871143] [2021-07-13 20:22:09,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:22:09,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:09,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:22:09,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:22:09,510 INFO L87 Difference]: Start difference. First operand 596 states and 1847 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-07-13 20:22:09,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:09,654 INFO L93 Difference]: Finished difference Result 1374 states and 4109 transitions. [2021-07-13 20:22:09,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:22:09,655 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:09,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:09,659 INFO L225 Difference]: With dead ends: 1374 [2021-07-13 20:22:09,659 INFO L226 Difference]: Without dead ends: 1350 [2021-07-13 20:22:09,659 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:22:09,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-07-13 20:22:09,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 911. [2021-07-13 20:22:09,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 3.197802197802198) internal successors, (2910), 910 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:09,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 2910 transitions. [2021-07-13 20:22:09,684 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 2910 transitions. Word has length 27 [2021-07-13 20:22:09,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:09,684 INFO L482 AbstractCegarLoop]: Abstraction has 911 states and 2910 transitions. [2021-07-13 20:22:09,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-07-13 20:22:09,684 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 2910 transitions. [2021-07-13 20:22:09,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:09,686 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:09,686 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:09,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 20:22:09,901 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:09,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:09,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1446478511, now seen corresponding path program 1 times [2021-07-13 20:22:09,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:09,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823002871] [2021-07-13 20:22:09,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:09,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:09,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:09,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823002871] [2021-07-13 20:22:09,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823002871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:09,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536027484] [2021-07-13 20:22:09,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:09,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:09,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:22:09,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:10,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536027484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:10,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:10,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 20:22:10,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064705991] [2021-07-13 20:22:10,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:22:10,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:10,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:22:10,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:22:10,074 INFO L87 Difference]: Start difference. First operand 911 states and 2910 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-07-13 20:22:10,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:10,355 INFO L93 Difference]: Finished difference Result 1491 states and 4323 transitions. [2021-07-13 20:22:10,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:22:10,355 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 27 [2021-07-13 20:22:10,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:10,358 INFO L225 Difference]: With dead ends: 1491 [2021-07-13 20:22:10,359 INFO L226 Difference]: Without dead ends: 1465 [2021-07-13 20:22:10,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 148.6ms TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:22:10,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2021-07-13 20:22:10,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 969. [2021-07-13 20:22:10,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 968 states have (on average 3.145661157024793) internal successors, (3045), 968 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:10,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 3045 transitions. [2021-07-13 20:22:10,385 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 3045 transitions. Word has length 27 [2021-07-13 20:22:10,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:10,385 INFO L482 AbstractCegarLoop]: Abstraction has 969 states and 3045 transitions. [2021-07-13 20:22:10,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-07-13 20:22:10,385 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 3045 transitions. [2021-07-13 20:22:10,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:10,388 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:10,388 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:10,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-13 20:22:10,601 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:10,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:10,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1928537542, now seen corresponding path program 7 times [2021-07-13 20:22:10,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:10,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424161624] [2021-07-13 20:22:10,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:10,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:10,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424161624] [2021-07-13 20:22:10,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424161624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:10,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306898828] [2021-07-13 20:22:10,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:10,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:10,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:10,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:10,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306898828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:10,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:10,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:22:10,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135157836] [2021-07-13 20:22:10,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:22:10,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:10,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:22:10,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:22:10,817 INFO L87 Difference]: Start difference. First operand 969 states and 3045 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:10,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:10,996 INFO L93 Difference]: Finished difference Result 1664 states and 5013 transitions. [2021-07-13 20:22:10,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:22:10,997 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:10,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:11,000 INFO L225 Difference]: With dead ends: 1664 [2021-07-13 20:22:11,000 INFO L226 Difference]: Without dead ends: 1632 [2021-07-13 20:22:11,001 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 151.5ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:22:11,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2021-07-13 20:22:11,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1122. [2021-07-13 20:22:11,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 3.1793041926851027) internal successors, (3564), 1121 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:11,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 3564 transitions. [2021-07-13 20:22:11,029 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 3564 transitions. Word has length 27 [2021-07-13 20:22:11,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:11,029 INFO L482 AbstractCegarLoop]: Abstraction has 1122 states and 3564 transitions. [2021-07-13 20:22:11,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:11,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 3564 transitions. [2021-07-13 20:22:11,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:11,032 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:11,032 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:11,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 20:22:11,249 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:11,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:11,249 INFO L82 PathProgramCache]: Analyzing trace with hash -337091691, now seen corresponding path program 2 times [2021-07-13 20:22:11,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:11,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792340876] [2021-07-13 20:22:11,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:11,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:11,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:11,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:11,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792340876] [2021-07-13 20:22:11,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792340876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:11,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917642094] [2021-07-13 20:22:11,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:11,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:22:11,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:11,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:22:11,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:11,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:11,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917642094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:11,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:11,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 20:22:11,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329474129] [2021-07-13 20:22:11,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:22:11,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:11,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:22:11,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:22:11,397 INFO L87 Difference]: Start difference. First operand 1122 states and 3564 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-07-13 20:22:11,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:11,709 INFO L93 Difference]: Finished difference Result 1812 states and 5305 transitions. [2021-07-13 20:22:11,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:22:11,710 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:11,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:11,714 INFO L225 Difference]: With dead ends: 1812 [2021-07-13 20:22:11,715 INFO L226 Difference]: Without dead ends: 1790 [2021-07-13 20:22:11,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:22:11,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-07-13 20:22:11,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1115. [2021-07-13 20:22:11,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1114 states have (on average 3.1867145421903054) internal successors, (3550), 1114 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:11,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 3550 transitions. [2021-07-13 20:22:11,755 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 3550 transitions. Word has length 27 [2021-07-13 20:22:11,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:11,755 INFO L482 AbstractCegarLoop]: Abstraction has 1115 states and 3550 transitions. [2021-07-13 20:22:11,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-07-13 20:22:11,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 3550 transitions. [2021-07-13 20:22:11,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:11,758 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:11,758 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:11,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:11,981 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:11,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:11,981 INFO L82 PathProgramCache]: Analyzing trace with hash 570714739, now seen corresponding path program 3 times [2021-07-13 20:22:11,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:11,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174629832] [2021-07-13 20:22:11,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:12,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:12,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:12,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174629832] [2021-07-13 20:22:12,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174629832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:12,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700771041] [2021-07-13 20:22:12,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:12,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:22:12,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:12,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:22:12,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:12,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700771041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:12,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:12,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:22:12,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669364115] [2021-07-13 20:22:12,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:22:12,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:12,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:22:12,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:22:12,113 INFO L87 Difference]: Start difference. First operand 1115 states and 3550 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-07-13 20:22:12,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:12,384 INFO L93 Difference]: Finished difference Result 2086 states and 6158 transitions. [2021-07-13 20:22:12,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:22:12,385 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:12,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:12,394 INFO L225 Difference]: With dead ends: 2086 [2021-07-13 20:22:12,394 INFO L226 Difference]: Without dead ends: 2060 [2021-07-13 20:22:12,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 133.6ms TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:22:12,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2021-07-13 20:22:12,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1141. [2021-07-13 20:22:12,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.207894736842105) internal successors, (3657), 1140 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:12,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3657 transitions. [2021-07-13 20:22:12,428 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3657 transitions. Word has length 27 [2021-07-13 20:22:12,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:12,428 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3657 transitions. [2021-07-13 20:22:12,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-07-13 20:22:12,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3657 transitions. [2021-07-13 20:22:12,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:12,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:12,432 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:12,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-13 20:22:12,655 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:12,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:12,656 INFO L82 PathProgramCache]: Analyzing trace with hash 2074608542, now seen corresponding path program 7 times [2021-07-13 20:22:12,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:12,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538467315] [2021-07-13 20:22:12,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:12,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:12,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:12,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:12,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538467315] [2021-07-13 20:22:12,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538467315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:12,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956771824] [2021-07-13 20:22:12,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:12,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:22:12,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:12,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:12,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956771824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:12,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:12,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-07-13 20:22:12,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597350491] [2021-07-13 20:22:12,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:22:12,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:12,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:22:12,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:22:12,790 INFO L87 Difference]: Start difference. First operand 1141 states and 3657 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:12,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:12,945 INFO L93 Difference]: Finished difference Result 1777 states and 5270 transitions. [2021-07-13 20:22:12,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:22:12,945 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:12,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:12,962 INFO L225 Difference]: With dead ends: 1777 [2021-07-13 20:22:12,962 INFO L226 Difference]: Without dead ends: 1777 [2021-07-13 20:22:12,963 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:22:12,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-07-13 20:22:12,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1147. [2021-07-13 20:22:12,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 3.1928446771378707) internal successors, (3659), 1146 states have internal predecessors, (3659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:12,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 3659 transitions. [2021-07-13 20:22:12,993 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 3659 transitions. Word has length 27 [2021-07-13 20:22:12,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:12,994 INFO L482 AbstractCegarLoop]: Abstraction has 1147 states and 3659 transitions. [2021-07-13 20:22:12,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:12,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 3659 transitions. [2021-07-13 20:22:12,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:12,997 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:12,997 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:13,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-07-13 20:22:13,211 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:13,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:13,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1728029405, now seen corresponding path program 8 times [2021-07-13 20:22:13,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:13,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470570708] [2021-07-13 20:22:13,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:13,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:13,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:13,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470570708] [2021-07-13 20:22:13,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470570708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:13,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110524488] [2021-07-13 20:22:13,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:13,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:22:13,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:13,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:13,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:13,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:13,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110524488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:13,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:13,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-13 20:22:13,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625779970] [2021-07-13 20:22:13,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:22:13,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:13,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:22:13,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:22:13,344 INFO L87 Difference]: Start difference. First operand 1147 states and 3659 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-07-13 20:22:13,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:13,969 INFO L93 Difference]: Finished difference Result 4076 states and 11819 transitions. [2021-07-13 20:22:13,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:22:13,969 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:13,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:13,988 INFO L225 Difference]: With dead ends: 4076 [2021-07-13 20:22:13,989 INFO L226 Difference]: Without dead ends: 4076 [2021-07-13 20:22:13,989 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 282.6ms TimeCoverageRelationStatistics Valid=362, Invalid=1120, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:22:13,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-07-13 20:22:14,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 1262. [2021-07-13 20:22:14,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 3.274385408406027) internal successors, (4129), 1261 states have internal predecessors, (4129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:14,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 4129 transitions. [2021-07-13 20:22:14,042 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 4129 transitions. Word has length 27 [2021-07-13 20:22:14,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:14,043 INFO L482 AbstractCegarLoop]: Abstraction has 1262 states and 4129 transitions. [2021-07-13 20:22:14,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-07-13 20:22:14,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 4129 transitions. [2021-07-13 20:22:14,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:14,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:14,047 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:14,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:14,261 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:14,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:14,261 INFO L82 PathProgramCache]: Analyzing trace with hash -584257835, now seen corresponding path program 4 times [2021-07-13 20:22:14,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:14,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633346311] [2021-07-13 20:22:14,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:14,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:14,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633346311] [2021-07-13 20:22:14,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633346311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:14,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477644987] [2021-07-13 20:22:14,306 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 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 [2021-07-13 20:22:14,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:22:14,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:14,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:22:14,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:14,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:14,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477644987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:14,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:14,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:22:14,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249657284] [2021-07-13 20:22:14,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:22:14,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:14,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:22:14,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:22:14,411 INFO L87 Difference]: Start difference. First operand 1262 states and 4129 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-07-13 20:22:14,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:14,662 INFO L93 Difference]: Finished difference Result 2048 states and 6254 transitions. [2021-07-13 20:22:14,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:22:14,663 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:14,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:14,666 INFO L225 Difference]: With dead ends: 2048 [2021-07-13 20:22:14,666 INFO L226 Difference]: Without dead ends: 2048 [2021-07-13 20:22:14,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 129.1ms TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:22:14,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2048 states. [2021-07-13 20:22:14,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2048 to 1280. [2021-07-13 20:22:14,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 3.2752150117279126) internal successors, (4189), 1279 states have internal predecessors, (4189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:14,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 4189 transitions. [2021-07-13 20:22:14,698 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 4189 transitions. Word has length 27 [2021-07-13 20:22:14,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:14,698 INFO L482 AbstractCegarLoop]: Abstraction has 1280 states and 4189 transitions. [2021-07-13 20:22:14,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-07-13 20:22:14,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 4189 transitions. [2021-07-13 20:22:14,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:14,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:14,701 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:14,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-13 20:22:14,925 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:14,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:14,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1538811107, now seen corresponding path program 9 times [2021-07-13 20:22:14,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:14,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986927341] [2021-07-13 20:22:14,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:14,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:14,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:14,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986927341] [2021-07-13 20:22:14,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986927341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:14,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233610898] [2021-07-13 20:22:14,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:15,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:22:15,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:15,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:15,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:15,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:15,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233610898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:15,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:15,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-13 20:22:15,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372611847] [2021-07-13 20:22:15,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:22:15,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:15,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:22:15,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:22:15,064 INFO L87 Difference]: Start difference. First operand 1280 states and 4189 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-07-13 20:22:15,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:15,649 INFO L93 Difference]: Finished difference Result 3885 states and 11397 transitions. [2021-07-13 20:22:15,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:22:15,649 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:15,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:15,656 INFO L225 Difference]: With dead ends: 3885 [2021-07-13 20:22:15,656 INFO L226 Difference]: Without dead ends: 3877 [2021-07-13 20:22:15,657 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 270.6ms TimeCoverageRelationStatistics Valid=317, Invalid=943, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:22:15,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3877 states. [2021-07-13 20:22:15,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3877 to 1292. [2021-07-13 20:22:15,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.260263361735089) internal successors, (4209), 1291 states have internal predecessors, (4209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:15,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4209 transitions. [2021-07-13 20:22:15,699 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4209 transitions. Word has length 27 [2021-07-13 20:22:15,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:15,699 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 4209 transitions. [2021-07-13 20:22:15,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-07-13 20:22:15,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4209 transitions. [2021-07-13 20:22:15,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:15,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:15,702 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:15,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:15,917 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:15,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:15,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1366634973, now seen corresponding path program 10 times [2021-07-13 20:22:15,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:15,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953857322] [2021-07-13 20:22:15,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:15,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:15,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953857322] [2021-07-13 20:22:15,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953857322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:15,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362133739] [2021-07-13 20:22:15,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:15,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:22:15,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:15,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:15,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:16,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:16,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362133739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:16,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:16,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-07-13 20:22:16,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638746486] [2021-07-13 20:22:16,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:22:16,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:16,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:22:16,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:22:16,077 INFO L87 Difference]: Start difference. First operand 1292 states and 4209 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:16,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:16,747 INFO L93 Difference]: Finished difference Result 3967 states and 11593 transitions. [2021-07-13 20:22:16,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:22:16,747 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:16,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:16,754 INFO L225 Difference]: With dead ends: 3967 [2021-07-13 20:22:16,754 INFO L226 Difference]: Without dead ends: 3967 [2021-07-13 20:22:16,754 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 351.6ms TimeCoverageRelationStatistics Valid=423, Invalid=1299, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:22:16,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3967 states. [2021-07-13 20:22:16,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3967 to 1392. [2021-07-13 20:22:16,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.250179726815241) internal successors, (4521), 1391 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:16,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4521 transitions. [2021-07-13 20:22:16,798 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4521 transitions. Word has length 27 [2021-07-13 20:22:16,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:16,798 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 4521 transitions. [2021-07-13 20:22:16,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:16,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4521 transitions. [2021-07-13 20:22:16,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:16,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:16,802 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:17,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 20:22:17,017 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:17,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:17,018 INFO L82 PathProgramCache]: Analyzing trace with hash 416014497, now seen corresponding path program 11 times [2021-07-13 20:22:17,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:17,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332675134] [2021-07-13 20:22:17,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:17,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:17,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:17,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332675134] [2021-07-13 20:22:17,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332675134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:17,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307206856] [2021-07-13 20:22:17,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:17,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:22:17,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:17,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:17,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:17,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:17,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307206856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:17,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:17,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-07-13 20:22:17,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710360530] [2021-07-13 20:22:17,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:22:17,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:17,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:22:17,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:22:17,151 INFO L87 Difference]: Start difference. First operand 1392 states and 4521 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:17,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:17,831 INFO L93 Difference]: Finished difference Result 3712 states and 10972 transitions. [2021-07-13 20:22:17,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:22:17,831 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:17,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:17,838 INFO L225 Difference]: With dead ends: 3712 [2021-07-13 20:22:17,838 INFO L226 Difference]: Without dead ends: 3704 [2021-07-13 20:22:17,839 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 347.7ms TimeCoverageRelationStatistics Valid=376, Invalid=1106, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:22:17,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2021-07-13 20:22:17,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 1392. [2021-07-13 20:22:17,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.2473040977713876) internal successors, (4517), 1391 states have internal predecessors, (4517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:17,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4517 transitions. [2021-07-13 20:22:17,885 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4517 transitions. Word has length 27 [2021-07-13 20:22:17,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:17,885 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 4517 transitions. [2021-07-13 20:22:17,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:17,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4517 transitions. [2021-07-13 20:22:17,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:17,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:17,888 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:18,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 20:22:18,106 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:18,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:18,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1631157469, now seen corresponding path program 12 times [2021-07-13 20:22:18,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:18,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995321857] [2021-07-13 20:22:18,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:18,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:18,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995321857] [2021-07-13 20:22:18,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995321857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:18,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896964073] [2021-07-13 20:22:18,147 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 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 [2021-07-13 20:22:18,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:22:18,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:18,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:18,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:18,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:18,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896964073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:18,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:18,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:22:18,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918247963] [2021-07-13 20:22:18,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:22:18,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:18,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:22:18,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:22:18,251 INFO L87 Difference]: Start difference. First operand 1392 states and 4517 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:18,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:18,694 INFO L93 Difference]: Finished difference Result 3014 states and 9077 transitions. [2021-07-13 20:22:18,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:22:18,694 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:18,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:18,701 INFO L225 Difference]: With dead ends: 3014 [2021-07-13 20:22:18,701 INFO L226 Difference]: Without dead ends: 3014 [2021-07-13 20:22:18,701 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 225.4ms TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:22:18,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3014 states. [2021-07-13 20:22:18,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3014 to 1410. [2021-07-13 20:22:18,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 3.2462739531582683) internal successors, (4574), 1409 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:18,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 4574 transitions. [2021-07-13 20:22:18,741 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 4574 transitions. Word has length 27 [2021-07-13 20:22:18,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:18,742 INFO L482 AbstractCegarLoop]: Abstraction has 1410 states and 4574 transitions. [2021-07-13 20:22:18,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:18,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 4574 transitions. [2021-07-13 20:22:18,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:18,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:18,748 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:18,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 20:22:18,971 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:18,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:18,971 INFO L82 PathProgramCache]: Analyzing trace with hash 733023956, now seen corresponding path program 8 times [2021-07-13 20:22:18,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:18,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480720908] [2021-07-13 20:22:18,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:19,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:19,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:19,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480720908] [2021-07-13 20:22:19,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480720908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:19,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101322831] [2021-07-13 20:22:19,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:19,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:22:19,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:19,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:19,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:19,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:19,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101322831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:19,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:19,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:22:19,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420609805] [2021-07-13 20:22:19,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:22:19,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:19,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:22:19,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:22:19,108 INFO L87 Difference]: Start difference. First operand 1410 states and 4574 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-07-13 20:22:19,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:19,449 INFO L93 Difference]: Finished difference Result 3028 states and 9102 transitions. [2021-07-13 20:22:19,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:22:19,450 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:19,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:19,454 INFO L225 Difference]: With dead ends: 3028 [2021-07-13 20:22:19,454 INFO L226 Difference]: Without dead ends: 3028 [2021-07-13 20:22:19,455 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 180.9ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:22:19,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3028 states. [2021-07-13 20:22:19,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3028 to 1426. [2021-07-13 20:22:19,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.2435087719298243) internal successors, (4622), 1425 states have internal predecessors, (4622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:19,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 4622 transitions. [2021-07-13 20:22:19,495 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 4622 transitions. Word has length 27 [2021-07-13 20:22:19,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:19,495 INFO L482 AbstractCegarLoop]: Abstraction has 1426 states and 4622 transitions. [2021-07-13 20:22:19,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-07-13 20:22:19,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 4622 transitions. [2021-07-13 20:22:19,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:19,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:19,519 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:19,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 20:22:19,733 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:19,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:19,733 INFO L82 PathProgramCache]: Analyzing trace with hash 645299584, now seen corresponding path program 9 times [2021-07-13 20:22:19,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:19,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738361040] [2021-07-13 20:22:19,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:19,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:19,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:19,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738361040] [2021-07-13 20:22:19,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738361040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:19,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192551554] [2021-07-13 20:22:19,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:19,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:22:19,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:19,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:19,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:19,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:19,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192551554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:19,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:19,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:22:19,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537571725] [2021-07-13 20:22:19,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:22:19,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:19,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:22:19,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:22:19,866 INFO L87 Difference]: Start difference. First operand 1426 states and 4622 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-07-13 20:22:20,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:20,347 INFO L93 Difference]: Finished difference Result 3515 states and 10389 transitions. [2021-07-13 20:22:20,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:22:20,347 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:20,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:20,353 INFO L225 Difference]: With dead ends: 3515 [2021-07-13 20:22:20,353 INFO L226 Difference]: Without dead ends: 3515 [2021-07-13 20:22:20,354 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 248.8ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:22:20,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3515 states. [2021-07-13 20:22:20,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3515 to 1494. [2021-07-13 20:22:20,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 3.2391158740790353) internal successors, (4836), 1493 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:20,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 4836 transitions. [2021-07-13 20:22:20,398 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 4836 transitions. Word has length 27 [2021-07-13 20:22:20,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:20,398 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 4836 transitions. [2021-07-13 20:22:20,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-07-13 20:22:20,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 4836 transitions. [2021-07-13 20:22:20,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:20,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:20,402 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:20,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 20:22:20,623 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:20,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:20,623 INFO L82 PathProgramCache]: Analyzing trace with hash 317969308, now seen corresponding path program 10 times [2021-07-13 20:22:20,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:20,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668886618] [2021-07-13 20:22:20,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:20,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:20,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:20,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668886618] [2021-07-13 20:22:20,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668886618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:20,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014550885] [2021-07-13 20:22:20,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:22:20,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:22:20,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:20,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:20,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:20,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:20,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014550885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:20,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:20,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:22:20,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155881045] [2021-07-13 20:22:20,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:22:20,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:20,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:22:20,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:22:20,777 INFO L87 Difference]: Start difference. First operand 1494 states and 4836 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:21,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:21,095 INFO L93 Difference]: Finished difference Result 3812 states and 11703 transitions. [2021-07-13 20:22:21,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:22:21,096 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:21,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:21,102 INFO L225 Difference]: With dead ends: 3812 [2021-07-13 20:22:21,102 INFO L226 Difference]: Without dead ends: 3805 [2021-07-13 20:22:21,102 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 205.4ms TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:22:21,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2021-07-13 20:22:21,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 2152. [2021-07-13 20:22:21,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 3.3421664342166433) internal successors, (7189), 2151 states have internal predecessors, (7189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:21,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 7189 transitions. [2021-07-13 20:22:21,157 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 7189 transitions. Word has length 27 [2021-07-13 20:22:21,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:21,157 INFO L482 AbstractCegarLoop]: Abstraction has 2152 states and 7189 transitions. [2021-07-13 20:22:21,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:21,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 7189 transitions. [2021-07-13 20:22:21,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:21,163 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:21,163 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:21,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:21,377 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:21,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:21,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1267266998, now seen corresponding path program 11 times [2021-07-13 20:22:21,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:21,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905751014] [2021-07-13 20:22:21,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:21,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:21,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:21,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905751014] [2021-07-13 20:22:21,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905751014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:21,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358835631] [2021-07-13 20:22:21,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:21,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:22:21,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:21,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:21,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:21,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358835631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:21,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:21,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:22:21,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704283936] [2021-07-13 20:22:21,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:22:21,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:21,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:22:21,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:22:21,516 INFO L87 Difference]: Start difference. First operand 2152 states and 7189 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:21,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:21,879 INFO L93 Difference]: Finished difference Result 3889 states and 11952 transitions. [2021-07-13 20:22:21,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:22:21,879 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:21,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:21,888 INFO L225 Difference]: With dead ends: 3889 [2021-07-13 20:22:21,888 INFO L226 Difference]: Without dead ends: 3889 [2021-07-13 20:22:21,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 216.6ms TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:22:21,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3889 states. [2021-07-13 20:22:21,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3889 to 2116. [2021-07-13 20:22:21,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2115 states have (on average 3.315839243498818) internal successors, (7013), 2115 states have internal predecessors, (7013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:21,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 7013 transitions. [2021-07-13 20:22:21,946 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 7013 transitions. Word has length 27 [2021-07-13 20:22:21,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:21,946 INFO L482 AbstractCegarLoop]: Abstraction has 2116 states and 7013 transitions. [2021-07-13 20:22:21,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:21,946 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 7013 transitions. [2021-07-13 20:22:21,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:21,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:21,951 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:22,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:22,175 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:22,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:22,175 INFO L82 PathProgramCache]: Analyzing trace with hash -904631356, now seen corresponding path program 12 times [2021-07-13 20:22:22,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:22,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626733380] [2021-07-13 20:22:22,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:22,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:22,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626733380] [2021-07-13 20:22:22,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626733380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:22,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624580454] [2021-07-13 20:22:22,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:22,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:22:22,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:22,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:22,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:22,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624580454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:22,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:22,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:22:22,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650442578] [2021-07-13 20:22:22,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:22:22,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:22,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:22:22,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:22:22,295 INFO L87 Difference]: Start difference. First operand 2116 states and 7013 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-07-13 20:22:22,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:22,710 INFO L93 Difference]: Finished difference Result 3915 states and 12164 transitions. [2021-07-13 20:22:22,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:22:22,711 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:22,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:22,717 INFO L225 Difference]: With dead ends: 3915 [2021-07-13 20:22:22,718 INFO L226 Difference]: Without dead ends: 3911 [2021-07-13 20:22:22,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 198.7ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:22:22,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3911 states. [2021-07-13 20:22:22,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3911 to 2114. [2021-07-13 20:22:22,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 3.313771888310459) internal successors, (7002), 2113 states have internal predecessors, (7002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:22,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 7002 transitions. [2021-07-13 20:22:22,757 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 7002 transitions. Word has length 27 [2021-07-13 20:22:22,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:22,757 INFO L482 AbstractCegarLoop]: Abstraction has 2114 states and 7002 transitions. [2021-07-13 20:22:22,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-07-13 20:22:22,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 7002 transitions. [2021-07-13 20:22:22,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:22,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:22,762 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:22,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-13 20:22:22,985 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:22,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:22,985 INFO L82 PathProgramCache]: Analyzing trace with hash 741045571, now seen corresponding path program 5 times [2021-07-13 20:22:22,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:22,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769715545] [2021-07-13 20:22:22,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:22,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:23,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:23,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:23,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769715545] [2021-07-13 20:22:23,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769715545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:23,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904644273] [2021-07-13 20:22:23,032 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 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 [2021-07-13 20:22:23,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:22:23,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:23,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:22:23,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:23,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:23,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904644273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:23,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:23,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 20:22:23,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922811661] [2021-07-13 20:22:23,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:22:23,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:23,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:22:23,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:22:23,135 INFO L87 Difference]: Start difference. First operand 2114 states and 7002 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-07-13 20:22:23,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:23,468 INFO L93 Difference]: Finished difference Result 3295 states and 10178 transitions. [2021-07-13 20:22:23,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:22:23,468 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:23,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:23,474 INFO L225 Difference]: With dead ends: 3295 [2021-07-13 20:22:23,474 INFO L226 Difference]: Without dead ends: 3280 [2021-07-13 20:22:23,474 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 199.1ms TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:22:23,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-07-13 20:22:23,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 2176. [2021-07-13 20:22:23,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.331494252873563) internal successors, (7246), 2175 states have internal predecessors, (7246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:23,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 7246 transitions. [2021-07-13 20:22:23,510 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 7246 transitions. Word has length 27 [2021-07-13 20:22:23,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:23,510 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 7246 transitions. [2021-07-13 20:22:23,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-07-13 20:22:23,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 7246 transitions. [2021-07-13 20:22:23,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:23,517 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:23,517 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:23,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:23,729 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:23,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:23,729 INFO L82 PathProgramCache]: Analyzing trace with hash 989889791, now seen corresponding path program 6 times [2021-07-13 20:22:23,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:23,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569884927] [2021-07-13 20:22:23,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:23,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:23,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:23,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569884927] [2021-07-13 20:22:23,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569884927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:23,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895851315] [2021-07-13 20:22:23,758 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 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 [2021-07-13 20:22:23,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:22:23,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:23,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:22:23,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:23,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895851315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:23,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:23,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 20:22:23,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407079467] [2021-07-13 20:22:23,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:22:23,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:23,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:22:23,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:22:23,863 INFO L87 Difference]: Start difference. First operand 2176 states and 7246 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-07-13 20:22:24,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:24,156 INFO L93 Difference]: Finished difference Result 3360 states and 10395 transitions. [2021-07-13 20:22:24,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:22:24,156 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:24,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:24,164 INFO L225 Difference]: With dead ends: 3360 [2021-07-13 20:22:24,164 INFO L226 Difference]: Without dead ends: 3360 [2021-07-13 20:22:24,164 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 177.1ms TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:22:24,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2021-07-13 20:22:24,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 2143. [2021-07-13 20:22:24,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2143 states, 2142 states have (on average 3.316526610644258) internal successors, (7104), 2142 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:24,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2143 states to 2143 states and 7104 transitions. [2021-07-13 20:22:24,219 INFO L78 Accepts]: Start accepts. Automaton has 2143 states and 7104 transitions. Word has length 27 [2021-07-13 20:22:24,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:24,219 INFO L482 AbstractCegarLoop]: Abstraction has 2143 states and 7104 transitions. [2021-07-13 20:22:24,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-07-13 20:22:24,220 INFO L276 IsEmpty]: Start isEmpty. Operand 2143 states and 7104 transitions. [2021-07-13 20:22:24,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:24,223 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:24,223 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:24,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-13 20:22:24,424 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:24,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:24,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1160574596, now seen corresponding path program 13 times [2021-07-13 20:22:24,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:24,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156595130] [2021-07-13 20:22:24,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:24,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:24,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:24,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156595130] [2021-07-13 20:22:24,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156595130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:24,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075897758] [2021-07-13 20:22:24,460 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 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 [2021-07-13 20:22:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:24,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:24,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:24,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:24,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075897758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:24,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:24,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:22:24,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628281775] [2021-07-13 20:22:24,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:22:24,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:24,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:22:24,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:22:24,589 INFO L87 Difference]: Start difference. First operand 2143 states and 7104 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:25,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:25,389 INFO L93 Difference]: Finished difference Result 6236 states and 18781 transitions. [2021-07-13 20:22:25,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:22:25,389 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:25,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:25,401 INFO L225 Difference]: With dead ends: 6236 [2021-07-13 20:22:25,401 INFO L226 Difference]: Without dead ends: 6236 [2021-07-13 20:22:25,402 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 438.2ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:22:25,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6236 states. [2021-07-13 20:22:25,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6236 to 2154. [2021-07-13 20:22:25,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2154 states, 2153 states have (on average 3.32559219693451) internal successors, (7160), 2153 states have internal predecessors, (7160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:25,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2154 states to 2154 states and 7160 transitions. [2021-07-13 20:22:25,473 INFO L78 Accepts]: Start accepts. Automaton has 2154 states and 7160 transitions. Word has length 27 [2021-07-13 20:22:25,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:25,473 INFO L482 AbstractCegarLoop]: Abstraction has 2154 states and 7160 transitions. [2021-07-13 20:22:25,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:25,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2154 states and 7160 transitions. [2021-07-13 20:22:25,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:25,478 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:25,478 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:25,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:25,678 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:25,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:25,679 INFO L82 PathProgramCache]: Analyzing trace with hash 966673928, now seen corresponding path program 14 times [2021-07-13 20:22:25,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:25,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498569941] [2021-07-13 20:22:25,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:25,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:25,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:25,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498569941] [2021-07-13 20:22:25,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498569941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:25,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589544198] [2021-07-13 20:22:25,721 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:25,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:22:25,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:25,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:25,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:25,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:25,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589544198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:25,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:25,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:22:25,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962652736] [2021-07-13 20:22:25,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:22:25,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:25,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:22:25,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:22:25,845 INFO L87 Difference]: Start difference. First operand 2154 states and 7160 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:26,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:26,639 INFO L93 Difference]: Finished difference Result 6112 states and 18481 transitions. [2021-07-13 20:22:26,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:22:26,639 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:26,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:26,649 INFO L225 Difference]: With dead ends: 6112 [2021-07-13 20:22:26,649 INFO L226 Difference]: Without dead ends: 6112 [2021-07-13 20:22:26,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 430.6ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:22:26,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6112 states. [2021-07-13 20:22:26,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6112 to 2135. [2021-07-13 20:22:26,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2134 states have (on average 3.3130271790065606) internal successors, (7070), 2134 states have internal predecessors, (7070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:26,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 7070 transitions. [2021-07-13 20:22:26,707 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 7070 transitions. Word has length 27 [2021-07-13 20:22:26,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:26,707 INFO L482 AbstractCegarLoop]: Abstraction has 2135 states and 7070 transitions. [2021-07-13 20:22:26,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:26,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 7070 transitions. [2021-07-13 20:22:26,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:26,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:26,711 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:26,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-13 20:22:26,912 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:26,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:26,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1779667311, now seen corresponding path program 7 times [2021-07-13 20:22:26,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:26,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808366944] [2021-07-13 20:22:26,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:26,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:26,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:26,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808366944] [2021-07-13 20:22:26,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808366944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:26,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533534024] [2021-07-13 20:22:26,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:26,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:22:26,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:27,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:27,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533534024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:27,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:27,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:22:27,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874439518] [2021-07-13 20:22:27,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:22:27,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:27,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:22:27,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:22:27,024 INFO L87 Difference]: Start difference. First operand 2135 states and 7070 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-07-13 20:22:27,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:27,233 INFO L93 Difference]: Finished difference Result 3444 states and 10974 transitions. [2021-07-13 20:22:27,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:22:27,233 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:27,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:27,240 INFO L225 Difference]: With dead ends: 3444 [2021-07-13 20:22:27,240 INFO L226 Difference]: Without dead ends: 3418 [2021-07-13 20:22:27,240 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:22:27,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3418 states. [2021-07-13 20:22:27,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3418 to 2593. [2021-07-13 20:22:27,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2593 states, 2592 states have (on average 3.3599537037037037) internal successors, (8709), 2592 states have internal predecessors, (8709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:27,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2593 states to 2593 states and 8709 transitions. [2021-07-13 20:22:27,287 INFO L78 Accepts]: Start accepts. Automaton has 2593 states and 8709 transitions. Word has length 27 [2021-07-13 20:22:27,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:27,287 INFO L482 AbstractCegarLoop]: Abstraction has 2593 states and 8709 transitions. [2021-07-13 20:22:27,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-07-13 20:22:27,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2593 states and 8709 transitions. [2021-07-13 20:22:27,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:27,292 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:27,292 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:27,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-13 20:22:27,492 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:27,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:27,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1360327411, now seen corresponding path program 8 times [2021-07-13 20:22:27,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:27,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850825423] [2021-07-13 20:22:27,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:27,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:27,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:27,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:27,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850825423] [2021-07-13 20:22:27,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850825423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:27,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65553109] [2021-07-13 20:22:27,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:27,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:22:27,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:27,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:22:27,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:27,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:27,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65553109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:27,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:27,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:22:27,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752427851] [2021-07-13 20:22:27,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:22:27,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:27,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:22:27,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:22:27,624 INFO L87 Difference]: Start difference. First operand 2593 states and 8709 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-07-13 20:22:27,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:27,801 INFO L93 Difference]: Finished difference Result 3554 states and 11351 transitions. [2021-07-13 20:22:27,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:22:27,801 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:27,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:27,807 INFO L225 Difference]: With dead ends: 3554 [2021-07-13 20:22:27,807 INFO L226 Difference]: Without dead ends: 3554 [2021-07-13 20:22:27,808 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:22:27,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3554 states. [2021-07-13 20:22:27,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3554 to 2611. [2021-07-13 20:22:27,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2611 states, 2610 states have (on average 3.3555555555555556) internal successors, (8758), 2610 states have internal predecessors, (8758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:27,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2611 states to 2611 states and 8758 transitions. [2021-07-13 20:22:27,896 INFO L78 Accepts]: Start accepts. Automaton has 2611 states and 8758 transitions. Word has length 27 [2021-07-13 20:22:27,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:27,896 INFO L482 AbstractCegarLoop]: Abstraction has 2611 states and 8758 transitions. [2021-07-13 20:22:27,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-07-13 20:22:27,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2611 states and 8758 transitions. [2021-07-13 20:22:27,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:27,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:27,903 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:28,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-13 20:22:28,125 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:28,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:28,125 INFO L82 PathProgramCache]: Analyzing trace with hash -260473223, now seen corresponding path program 13 times [2021-07-13 20:22:28,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:28,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621949865] [2021-07-13 20:22:28,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:28,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:28,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:28,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621949865] [2021-07-13 20:22:28,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621949865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:28,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861382995] [2021-07-13 20:22:28,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:28,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:28,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:28,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:28,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:28,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861382995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:28,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:28,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-07-13 20:22:28,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358727261] [2021-07-13 20:22:28,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:22:28,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:28,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:22:28,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:22:28,299 INFO L87 Difference]: Start difference. First operand 2611 states and 8758 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:28,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:28,939 INFO L93 Difference]: Finished difference Result 8012 states and 25327 transitions. [2021-07-13 20:22:28,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:22:28,940 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:28,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:28,956 INFO L225 Difference]: With dead ends: 8012 [2021-07-13 20:22:28,956 INFO L226 Difference]: Without dead ends: 8012 [2021-07-13 20:22:28,957 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 363.3ms TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:22:28,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8012 states. [2021-07-13 20:22:29,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8012 to 3370. [2021-07-13 20:22:29,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3370 states, 3369 states have (on average 3.4579994063520334) internal successors, (11650), 3369 states have internal predecessors, (11650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:29,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3370 states to 3370 states and 11650 transitions. [2021-07-13 20:22:29,088 INFO L78 Accepts]: Start accepts. Automaton has 3370 states and 11650 transitions. Word has length 27 [2021-07-13 20:22:29,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:29,088 INFO L482 AbstractCegarLoop]: Abstraction has 3370 states and 11650 transitions. [2021-07-13 20:22:29,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:29,088 INFO L276 IsEmpty]: Start isEmpty. Operand 3370 states and 11650 transitions. [2021-07-13 20:22:29,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:29,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:29,095 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:29,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 20:22:29,297 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:29,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:29,297 INFO L82 PathProgramCache]: Analyzing trace with hash -454373891, now seen corresponding path program 14 times [2021-07-13 20:22:29,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:29,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748460636] [2021-07-13 20:22:29,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:29,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:29,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:29,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748460636] [2021-07-13 20:22:29,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748460636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:29,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933562049] [2021-07-13 20:22:29,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:29,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:22:29,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:29,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:29,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:29,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933562049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:29,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:29,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-07-13 20:22:29,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212378105] [2021-07-13 20:22:29,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:22:29,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:29,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:22:29,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:22:29,462 INFO L87 Difference]: Start difference. First operand 3370 states and 11650 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:30,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:30,170 INFO L93 Difference]: Finished difference Result 7985 states and 25267 transitions. [2021-07-13 20:22:30,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:22:30,171 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:30,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:30,185 INFO L225 Difference]: With dead ends: 7985 [2021-07-13 20:22:30,185 INFO L226 Difference]: Without dead ends: 7985 [2021-07-13 20:22:30,185 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 372.4ms TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:22:30,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7985 states. [2021-07-13 20:22:30,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7985 to 3369. [2021-07-13 20:22:30,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3369 states, 3368 states have (on average 3.4557600950118763) internal successors, (11639), 3368 states have internal predecessors, (11639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:30,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3369 states to 3369 states and 11639 transitions. [2021-07-13 20:22:30,267 INFO L78 Accepts]: Start accepts. Automaton has 3369 states and 11639 transitions. Word has length 27 [2021-07-13 20:22:30,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:30,267 INFO L482 AbstractCegarLoop]: Abstraction has 3369 states and 11639 transitions. [2021-07-13 20:22:30,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:30,267 INFO L276 IsEmpty]: Start isEmpty. Operand 3369 states and 11639 transitions. [2021-07-13 20:22:30,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:30,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:30,272 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:30,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:30,473 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:30,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:30,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1213889404, now seen corresponding path program 15 times [2021-07-13 20:22:30,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:30,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806594680] [2021-07-13 20:22:30,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:30,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:30,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:30,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806594680] [2021-07-13 20:22:30,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806594680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:30,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420248977] [2021-07-13 20:22:30,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:30,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:22:30,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:30,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:22:30,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:30,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:30,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420248977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:30,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:30,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-07-13 20:22:30,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843293280] [2021-07-13 20:22:30,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:22:30,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:30,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:22:30,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:22:30,581 INFO L87 Difference]: Start difference. First operand 3369 states and 11639 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:30,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:30,779 INFO L93 Difference]: Finished difference Result 5144 states and 16955 transitions. [2021-07-13 20:22:30,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:22:30,780 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:30,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:30,788 INFO L225 Difference]: With dead ends: 5144 [2021-07-13 20:22:30,788 INFO L226 Difference]: Without dead ends: 5133 [2021-07-13 20:22:30,789 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:22:30,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5133 states. [2021-07-13 20:22:30,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5133 to 3459. [2021-07-13 20:22:30,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3459 states, 3458 states have (on average 3.462695199537305) internal successors, (11974), 3458 states have internal predecessors, (11974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:30,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3459 states to 3459 states and 11974 transitions. [2021-07-13 20:22:30,863 INFO L78 Accepts]: Start accepts. Automaton has 3459 states and 11974 transitions. Word has length 27 [2021-07-13 20:22:30,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:30,863 INFO L482 AbstractCegarLoop]: Abstraction has 3459 states and 11974 transitions. [2021-07-13 20:22:30,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:30,863 INFO L276 IsEmpty]: Start isEmpty. Operand 3459 states and 11974 transitions. [2021-07-13 20:22:30,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:30,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:30,872 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:31,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:31,073 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:31,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:31,073 INFO L82 PathProgramCache]: Analyzing trace with hash -479704520, now seen corresponding path program 16 times [2021-07-13 20:22:31,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:31,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504694163] [2021-07-13 20:22:31,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:31,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:31,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:31,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:31,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504694163] [2021-07-13 20:22:31,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504694163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:31,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847878040] [2021-07-13 20:22:31,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:31,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:22:31,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:31,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:22:31,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:31,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847878040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:31,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:31,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-07-13 20:22:31,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223132799] [2021-07-13 20:22:31,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:22:31,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:31,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:22:31,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:22:31,179 INFO L87 Difference]: Start difference. First operand 3459 states and 11974 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:31,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:31,351 INFO L93 Difference]: Finished difference Result 5400 states and 17684 transitions. [2021-07-13 20:22:31,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:22:31,352 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:31,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:31,361 INFO L225 Difference]: With dead ends: 5400 [2021-07-13 20:22:31,361 INFO L226 Difference]: Without dead ends: 5400 [2021-07-13 20:22:31,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:22:31,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5400 states. [2021-07-13 20:22:31,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5400 to 3354. [2021-07-13 20:22:31,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3354 states, 3353 states have (on average 3.4446764091858038) internal successors, (11550), 3353 states have internal predecessors, (11550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:31,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3354 states to 3354 states and 11550 transitions. [2021-07-13 20:22:31,423 INFO L78 Accepts]: Start accepts. Automaton has 3354 states and 11550 transitions. Word has length 27 [2021-07-13 20:22:31,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:31,423 INFO L482 AbstractCegarLoop]: Abstraction has 3354 states and 11550 transitions. [2021-07-13 20:22:31,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:31,423 INFO L276 IsEmpty]: Start isEmpty. Operand 3354 states and 11550 transitions. [2021-07-13 20:22:31,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:31,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:31,429 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:31,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:31,629 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:31,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:31,630 INFO L82 PathProgramCache]: Analyzing trace with hash -826283657, now seen corresponding path program 17 times [2021-07-13 20:22:31,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:31,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556450549] [2021-07-13 20:22:31,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:31,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:31,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:31,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556450549] [2021-07-13 20:22:31,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556450549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:31,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141014781] [2021-07-13 20:22:31,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:31,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:22:31,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:31,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:31,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:31,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:31,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141014781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:31,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:31,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-13 20:22:31,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989171597] [2021-07-13 20:22:31,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:22:31,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:31,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:22:31,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:22:31,770 INFO L87 Difference]: Start difference. First operand 3354 states and 11550 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-07-13 20:22:32,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:32,293 INFO L93 Difference]: Finished difference Result 7362 states and 23005 transitions. [2021-07-13 20:22:32,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:22:32,293 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:32,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:32,307 INFO L225 Difference]: With dead ends: 7362 [2021-07-13 20:22:32,307 INFO L226 Difference]: Without dead ends: 7362 [2021-07-13 20:22:32,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 265.7ms TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:22:32,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7362 states. [2021-07-13 20:22:32,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7362 to 3368. [2021-07-13 20:22:32,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3368 states, 3367 states have (on average 3.4460944460944463) internal successors, (11603), 3367 states have internal predecessors, (11603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:32,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3368 states to 3368 states and 11603 transitions. [2021-07-13 20:22:32,422 INFO L78 Accepts]: Start accepts. Automaton has 3368 states and 11603 transitions. Word has length 27 [2021-07-13 20:22:32,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:32,423 INFO L482 AbstractCegarLoop]: Abstraction has 3368 states and 11603 transitions. [2021-07-13 20:22:32,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-07-13 20:22:32,423 INFO L276 IsEmpty]: Start isEmpty. Operand 3368 states and 11603 transitions. [2021-07-13 20:22:32,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:32,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:32,434 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:32,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:32,638 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:32,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:32,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1015501955, now seen corresponding path program 18 times [2021-07-13 20:22:32,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:32,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068574614] [2021-07-13 20:22:32,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:32,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:32,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:32,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:32,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068574614] [2021-07-13 20:22:32,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068574614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:32,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479155149] [2021-07-13 20:22:32,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:32,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:22:32,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:32,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:32,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:32,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:22:32,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479155149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:32,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:32,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-13 20:22:32,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843602261] [2021-07-13 20:22:32,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:22:32,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:32,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:22:32,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:22:32,761 INFO L87 Difference]: Start difference. First operand 3368 states and 11603 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-07-13 20:22:33,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:33,272 INFO L93 Difference]: Finished difference Result 7148 states and 22493 transitions. [2021-07-13 20:22:33,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:22:33,273 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:33,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:33,293 INFO L225 Difference]: With dead ends: 7148 [2021-07-13 20:22:33,294 INFO L226 Difference]: Without dead ends: 7140 [2021-07-13 20:22:33,294 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 235.9ms TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:22:33,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7140 states. [2021-07-13 20:22:33,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7140 to 3360. [2021-07-13 20:22:33,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 3.443584400119083) internal successors, (11567), 3359 states have internal predecessors, (11567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:33,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 11567 transitions. [2021-07-13 20:22:33,428 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 11567 transitions. Word has length 27 [2021-07-13 20:22:33,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:33,428 INFO L482 AbstractCegarLoop]: Abstraction has 3360 states and 11567 transitions. [2021-07-13 20:22:33,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-07-13 20:22:33,428 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 11567 transitions. [2021-07-13 20:22:33,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:33,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:33,434 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:33,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-13 20:22:33,634 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:33,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:33,635 INFO L82 PathProgramCache]: Analyzing trace with hash 374019261, now seen corresponding path program 19 times [2021-07-13 20:22:33,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:33,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961650045] [2021-07-13 20:22:33,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:33,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:33,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:33,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961650045] [2021-07-13 20:22:33,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961650045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:33,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767941725] [2021-07-13 20:22:33,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:33,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:33,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:33,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:33,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767941725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:33,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:33,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-07-13 20:22:33,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467488294] [2021-07-13 20:22:33,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:22:33,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:33,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:22:33,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:22:33,787 INFO L87 Difference]: Start difference. First operand 3360 states and 11567 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:34,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:34,367 INFO L93 Difference]: Finished difference Result 7312 states and 22866 transitions. [2021-07-13 20:22:34,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:22:34,367 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:34,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:34,383 INFO L225 Difference]: With dead ends: 7312 [2021-07-13 20:22:34,384 INFO L226 Difference]: Without dead ends: 7312 [2021-07-13 20:22:34,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 307.5ms TimeCoverageRelationStatistics Valid=383, Invalid=1177, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:22:34,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7312 states. [2021-07-13 20:22:34,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7312 to 3366. [2021-07-13 20:22:34,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3366 states, 3365 states have (on average 3.444873699851412) internal successors, (11592), 3365 states have internal predecessors, (11592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:34,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 11592 transitions. [2021-07-13 20:22:34,496 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 11592 transitions. Word has length 27 [2021-07-13 20:22:34,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:34,496 INFO L482 AbstractCegarLoop]: Abstraction has 3366 states and 11592 transitions. [2021-07-13 20:22:34,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:34,497 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 11592 transitions. [2021-07-13 20:22:34,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:34,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:34,502 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:34,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-13 20:22:34,703 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:34,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:34,703 INFO L82 PathProgramCache]: Analyzing trace with hash -2138298565, now seen corresponding path program 20 times [2021-07-13 20:22:34,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:34,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314929253] [2021-07-13 20:22:34,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:34,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:34,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:34,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314929253] [2021-07-13 20:22:34,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314929253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:34,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410026907] [2021-07-13 20:22:34,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:34,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:22:34,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:34,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:34,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:34,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:34,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410026907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:34,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:34,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-07-13 20:22:34,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522278158] [2021-07-13 20:22:34,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:22:34,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:34,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:22:34,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:22:34,843 INFO L87 Difference]: Start difference. First operand 3366 states and 11592 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:35,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:35,346 INFO L93 Difference]: Finished difference Result 7159 states and 22507 transitions. [2021-07-13 20:22:35,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:22:35,347 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:35,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:35,360 INFO L225 Difference]: With dead ends: 7159 [2021-07-13 20:22:35,361 INFO L226 Difference]: Without dead ends: 7151 [2021-07-13 20:22:35,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 241.9ms TimeCoverageRelationStatistics Valid=304, Invalid=956, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:22:35,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7151 states. [2021-07-13 20:22:35,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7151 to 3360. [2021-07-13 20:22:35,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 3.443584400119083) internal successors, (11567), 3359 states have internal predecessors, (11567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:35,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 11567 transitions. [2021-07-13 20:22:35,446 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 11567 transitions. Word has length 27 [2021-07-13 20:22:35,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:35,446 INFO L482 AbstractCegarLoop]: Abstraction has 3360 states and 11567 transitions. [2021-07-13 20:22:35,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:35,446 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 11567 transitions. [2021-07-13 20:22:35,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:35,451 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:35,451 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:35,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-13 20:22:35,652 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:35,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:35,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1533405914, now seen corresponding path program 21 times [2021-07-13 20:22:35,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:35,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697872669] [2021-07-13 20:22:35,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:35,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:35,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:35,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697872669] [2021-07-13 20:22:35,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697872669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:35,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66433153] [2021-07-13 20:22:35,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:35,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:22:35,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:35,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:22:35,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:35,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66433153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:35,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:35,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:22:35,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417841459] [2021-07-13 20:22:35,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:22:35,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:35,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:22:35,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:22:35,822 INFO L87 Difference]: Start difference. First operand 3360 states and 11567 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:36,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:36,032 INFO L93 Difference]: Finished difference Result 5123 states and 16923 transitions. [2021-07-13 20:22:36,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:22:36,032 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:36,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:36,045 INFO L225 Difference]: With dead ends: 5123 [2021-07-13 20:22:36,045 INFO L226 Difference]: Without dead ends: 5123 [2021-07-13 20:22:36,046 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:22:36,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5123 states. [2021-07-13 20:22:36,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5123 to 4026. [2021-07-13 20:22:36,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4026 states, 4025 states have (on average 3.443726708074534) internal successors, (13861), 4025 states have internal predecessors, (13861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:36,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4026 states to 4026 states and 13861 transitions. [2021-07-13 20:22:36,181 INFO L78 Accepts]: Start accepts. Automaton has 4026 states and 13861 transitions. Word has length 27 [2021-07-13 20:22:36,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:36,181 INFO L482 AbstractCegarLoop]: Abstraction has 4026 states and 13861 transitions. [2021-07-13 20:22:36,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:36,181 INFO L276 IsEmpty]: Start isEmpty. Operand 4026 states and 13861 transitions. [2021-07-13 20:22:36,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:36,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:36,201 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:36,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:36,423 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:36,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:36,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1095030085, now seen corresponding path program 22 times [2021-07-13 20:22:36,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:36,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133223753] [2021-07-13 20:22:36,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:36,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:36,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133223753] [2021-07-13 20:22:36,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133223753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:36,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928645823] [2021-07-13 20:22:36,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:36,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:22:36,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:36,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:36,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:36,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:36,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928645823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:36,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:36,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:22:36,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149777682] [2021-07-13 20:22:36,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:22:36,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:36,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:22:36,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:22:36,609 INFO L87 Difference]: Start difference. First operand 4026 states and 13861 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-07-13 20:22:37,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:37,289 INFO L93 Difference]: Finished difference Result 7661 states and 24465 transitions. [2021-07-13 20:22:37,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:22:37,289 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 27 [2021-07-13 20:22:37,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:37,305 INFO L225 Difference]: With dead ends: 7661 [2021-07-13 20:22:37,306 INFO L226 Difference]: Without dead ends: 7661 [2021-07-13 20:22:37,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 389.7ms TimeCoverageRelationStatistics Valid=392, Invalid=1330, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:22:37,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7661 states. [2021-07-13 20:22:37,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7661 to 4388. [2021-07-13 20:22:37,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4388 states, 4387 states have (on average 3.4410759060861635) internal successors, (15096), 4387 states have internal predecessors, (15096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:37,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4388 states to 4388 states and 15096 transitions. [2021-07-13 20:22:37,410 INFO L78 Accepts]: Start accepts. Automaton has 4388 states and 15096 transitions. Word has length 27 [2021-07-13 20:22:37,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:37,410 INFO L482 AbstractCegarLoop]: Abstraction has 4388 states and 15096 transitions. [2021-07-13 20:22:37,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-07-13 20:22:37,410 INFO L276 IsEmpty]: Start isEmpty. Operand 4388 states and 15096 transitions. [2021-07-13 20:22:37,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:37,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:37,417 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:37,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-13 20:22:37,617 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:37,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:37,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1284248383, now seen corresponding path program 23 times [2021-07-13 20:22:37,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:37,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7864794] [2021-07-13 20:22:37,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:37,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:37,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:37,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7864794] [2021-07-13 20:22:37,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7864794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:37,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927953475] [2021-07-13 20:22:37,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:37,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:22:37,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:37,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:37,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:37,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:37,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927953475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:37,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:37,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:22:37,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766776437] [2021-07-13 20:22:37,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:22:37,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:37,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:22:37,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:22:37,769 INFO L87 Difference]: Start difference. First operand 4388 states and 15096 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-07-13 20:22:38,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:38,441 INFO L93 Difference]: Finished difference Result 7294 states and 23512 transitions. [2021-07-13 20:22:38,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:22:38,443 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 27 [2021-07-13 20:22:38,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:38,463 INFO L225 Difference]: With dead ends: 7294 [2021-07-13 20:22:38,464 INFO L226 Difference]: Without dead ends: 7286 [2021-07-13 20:22:38,464 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 318.5ms TimeCoverageRelationStatistics Valid=279, Invalid=981, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:22:38,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7286 states. [2021-07-13 20:22:38,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7286 to 4380. [2021-07-13 20:22:38,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4380 states, 4379 states have (on average 3.4405115323133137) internal successors, (15066), 4379 states have internal predecessors, (15066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:38,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4380 states to 4380 states and 15066 transitions. [2021-07-13 20:22:38,577 INFO L78 Accepts]: Start accepts. Automaton has 4380 states and 15066 transitions. Word has length 27 [2021-07-13 20:22:38,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:38,577 INFO L482 AbstractCegarLoop]: Abstraction has 4380 states and 15066 transitions. [2021-07-13 20:22:38,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-07-13 20:22:38,577 INFO L276 IsEmpty]: Start isEmpty. Operand 4380 states and 15066 transitions. [2021-07-13 20:22:38,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:38,584 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:38,584 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:38,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-13 20:22:38,785 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:38,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:38,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1799080439, now seen corresponding path program 9 times [2021-07-13 20:22:38,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:38,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314940981] [2021-07-13 20:22:38,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:38,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:38,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:38,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:38,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314940981] [2021-07-13 20:22:38,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314940981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:38,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086600781] [2021-07-13 20:22:38,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:38,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:22:38,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:38,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:22:38,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:38,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:38,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086600781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:38,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:38,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-13 20:22:38,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931638719] [2021-07-13 20:22:38,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:22:38,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:38,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:22:38,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:22:38,968 INFO L87 Difference]: Start difference. First operand 4380 states and 15066 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-07-13 20:22:39,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:39,202 INFO L93 Difference]: Finished difference Result 5160 states and 17337 transitions. [2021-07-13 20:22:39,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:22:39,203 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:39,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:39,216 INFO L225 Difference]: With dead ends: 5160 [2021-07-13 20:22:39,216 INFO L226 Difference]: Without dead ends: 5160 [2021-07-13 20:22:39,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:22:39,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5160 states. [2021-07-13 20:22:39,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5160 to 4419. [2021-07-13 20:22:39,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4419 states, 4418 states have (on average 3.438886373924853) internal successors, (15193), 4418 states have internal predecessors, (15193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:39,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4419 states to 4419 states and 15193 transitions. [2021-07-13 20:22:39,318 INFO L78 Accepts]: Start accepts. Automaton has 4419 states and 15193 transitions. Word has length 27 [2021-07-13 20:22:39,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:39,318 INFO L482 AbstractCegarLoop]: Abstraction has 4419 states and 15193 transitions. [2021-07-13 20:22:39,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-07-13 20:22:39,318 INFO L276 IsEmpty]: Start isEmpty. Operand 4419 states and 15193 transitions. [2021-07-13 20:22:39,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:39,326 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:39,326 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:39,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:39,548 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:39,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:39,548 INFO L82 PathProgramCache]: Analyzing trace with hash -640866123, now seen corresponding path program 24 times [2021-07-13 20:22:39,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:39,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267727725] [2021-07-13 20:22:39,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:39,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:39,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:39,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:39,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267727725] [2021-07-13 20:22:39,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267727725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:39,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256353603] [2021-07-13 20:22:39,601 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:39,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:22:39,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:39,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:39,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:39,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:39,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256353603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:39,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:39,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:22:39,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072431480] [2021-07-13 20:22:39,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:22:39,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:39,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:22:39,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:22:39,776 INFO L87 Difference]: Start difference. First operand 4419 states and 15193 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-07-13 20:22:40,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:40,345 INFO L93 Difference]: Finished difference Result 7167 states and 23253 transitions. [2021-07-13 20:22:40,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:22:40,346 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 27 [2021-07-13 20:22:40,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:40,362 INFO L225 Difference]: With dead ends: 7167 [2021-07-13 20:22:40,362 INFO L226 Difference]: Without dead ends: 7135 [2021-07-13 20:22:40,363 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 338.0ms TimeCoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:22:40,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7135 states. [2021-07-13 20:22:40,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7135 to 4447. [2021-07-13 20:22:40,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4447 states, 4446 states have (on average 3.435672514619883) internal successors, (15275), 4446 states have internal predecessors, (15275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:40,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4447 states to 4447 states and 15275 transitions. [2021-07-13 20:22:40,492 INFO L78 Accepts]: Start accepts. Automaton has 4447 states and 15275 transitions. Word has length 27 [2021-07-13 20:22:40,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:40,493 INFO L482 AbstractCegarLoop]: Abstraction has 4447 states and 15275 transitions. [2021-07-13 20:22:40,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-07-13 20:22:40,493 INFO L276 IsEmpty]: Start isEmpty. Operand 4447 states and 15275 transitions. [2021-07-13 20:22:40,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:40,517 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:40,517 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:40,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-07-13 20:22:40,730 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:40,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:40,731 INFO L82 PathProgramCache]: Analyzing trace with hash -328510151, now seen corresponding path program 25 times [2021-07-13 20:22:40,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:40,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440127777] [2021-07-13 20:22:40,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:40,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:40,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:40,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:40,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440127777] [2021-07-13 20:22:40,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440127777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:40,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563561646] [2021-07-13 20:22:40,787 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:40,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:40,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:40,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:40,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:40,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563561646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:40,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:40,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:22:40,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104196836] [2021-07-13 20:22:40,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:22:40,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:40,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:22:40,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:22:40,928 INFO L87 Difference]: Start difference. First operand 4447 states and 15275 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:41,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:41,618 INFO L93 Difference]: Finished difference Result 7634 states and 24450 transitions. [2021-07-13 20:22:41,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:22:41,618 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:41,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:41,632 INFO L225 Difference]: With dead ends: 7634 [2021-07-13 20:22:41,632 INFO L226 Difference]: Without dead ends: 7634 [2021-07-13 20:22:41,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 435.2ms TimeCoverageRelationStatistics Valid=445, Invalid=1535, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:22:41,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7634 states. [2021-07-13 20:22:41,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7634 to 4681. [2021-07-13 20:22:41,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4681 states, 4680 states have (on average 3.4264957264957263) internal successors, (16036), 4680 states have internal predecessors, (16036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:41,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4681 states to 4681 states and 16036 transitions. [2021-07-13 20:22:41,726 INFO L78 Accepts]: Start accepts. Automaton has 4681 states and 16036 transitions. Word has length 27 [2021-07-13 20:22:41,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:41,726 INFO L482 AbstractCegarLoop]: Abstraction has 4681 states and 16036 transitions. [2021-07-13 20:22:41,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:41,726 INFO L276 IsEmpty]: Start isEmpty. Operand 4681 states and 16036 transitions. [2021-07-13 20:22:41,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:41,733 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:41,733 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:41,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:41,934 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:41,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:41,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1454139319, now seen corresponding path program 26 times [2021-07-13 20:22:41,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:41,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633047068] [2021-07-13 20:22:41,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:41,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:42,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:42,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:42,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633047068] [2021-07-13 20:22:42,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633047068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:42,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158792441] [2021-07-13 20:22:42,010 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:42,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:22:42,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:42,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:42,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:42,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:42,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158792441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:42,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:42,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:22:42,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194530305] [2021-07-13 20:22:42,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:22:42,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:42,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:22:42,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:22:42,168 INFO L87 Difference]: Start difference. First operand 4681 states and 16036 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:42,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:42,812 INFO L93 Difference]: Finished difference Result 7391 states and 23828 transitions. [2021-07-13 20:22:42,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:22:42,812 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:42,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:42,830 INFO L225 Difference]: With dead ends: 7391 [2021-07-13 20:22:42,830 INFO L226 Difference]: Without dead ends: 7383 [2021-07-13 20:22:42,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 358.1ms TimeCoverageRelationStatistics Valid=313, Invalid=1093, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:22:42,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7383 states. [2021-07-13 20:22:42,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7383 to 4675. [2021-07-13 20:22:42,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4675 states, 4674 states have (on average 3.4251176722293537) internal successors, (16009), 4674 states have internal predecessors, (16009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:43,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4675 states to 4675 states and 16009 transitions. [2021-07-13 20:22:43,014 INFO L78 Accepts]: Start accepts. Automaton has 4675 states and 16009 transitions. Word has length 27 [2021-07-13 20:22:43,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:43,015 INFO L482 AbstractCegarLoop]: Abstraction has 4675 states and 16009 transitions. [2021-07-13 20:22:43,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:43,015 INFO L276 IsEmpty]: Start isEmpty. Operand 4675 states and 16009 transitions. [2021-07-13 20:22:43,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:43,044 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:43,045 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:43,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-13 20:22:43,265 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:43,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:43,265 INFO L82 PathProgramCache]: Analyzing trace with hash 609167867, now seen corresponding path program 27 times [2021-07-13 20:22:43,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:43,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456207245] [2021-07-13 20:22:43,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:43,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:43,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456207245] [2021-07-13 20:22:43,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456207245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:43,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875900853] [2021-07-13 20:22:43,363 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:43,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:22:43,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:43,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:43,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:43,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:43,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875900853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:43,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:43,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:22:43,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325230782] [2021-07-13 20:22:43,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:22:43,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:43,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:22:43,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:22:43,466 INFO L87 Difference]: Start difference. First operand 4675 states and 16009 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:44,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:44,059 INFO L93 Difference]: Finished difference Result 7057 states and 23013 transitions. [2021-07-13 20:22:44,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:22:44,060 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:44,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:44,078 INFO L225 Difference]: With dead ends: 7057 [2021-07-13 20:22:44,079 INFO L226 Difference]: Without dead ends: 7025 [2021-07-13 20:22:44,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 290.8ms TimeCoverageRelationStatistics Valid=260, Invalid=862, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:22:44,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7025 states. [2021-07-13 20:22:44,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7025 to 4719. [2021-07-13 20:22:44,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4719 states, 4718 states have (on average 3.42030521407376) internal successors, (16137), 4718 states have internal predecessors, (16137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:44,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4719 states to 4719 states and 16137 transitions. [2021-07-13 20:22:44,217 INFO L78 Accepts]: Start accepts. Automaton has 4719 states and 16137 transitions. Word has length 27 [2021-07-13 20:22:44,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:44,217 INFO L482 AbstractCegarLoop]: Abstraction has 4719 states and 16137 transitions. [2021-07-13 20:22:44,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:44,217 INFO L276 IsEmpty]: Start isEmpty. Operand 4719 states and 16137 transitions. [2021-07-13 20:22:44,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:44,226 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:44,226 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:44,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-07-13 20:22:44,449 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:44,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:44,449 INFO L82 PathProgramCache]: Analyzing trace with hash 273764453, now seen corresponding path program 28 times [2021-07-13 20:22:44,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:44,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79347196] [2021-07-13 20:22:44,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:44,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:44,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:44,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79347196] [2021-07-13 20:22:44,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79347196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:44,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580317549] [2021-07-13 20:22:44,503 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:44,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:22:44,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:44,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:44,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:44,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:44,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580317549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:44,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:44,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:22:44,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051144641] [2021-07-13 20:22:44,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:22:44,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:44,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:22:44,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:22:44,630 INFO L87 Difference]: Start difference. First operand 4719 states and 16137 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:45,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:45,109 INFO L93 Difference]: Finished difference Result 6384 states and 21138 transitions. [2021-07-13 20:22:45,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:22:45,109 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:45,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:45,126 INFO L225 Difference]: With dead ends: 6384 [2021-07-13 20:22:45,126 INFO L226 Difference]: Without dead ends: 6384 [2021-07-13 20:22:45,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 223.0ms TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:22:45,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6384 states. [2021-07-13 20:22:45,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6384 to 4849. [2021-07-13 20:22:45,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4849 states, 4848 states have (on average 3.4096534653465347) internal successors, (16530), 4848 states have internal predecessors, (16530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:45,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4849 states to 4849 states and 16530 transitions. [2021-07-13 20:22:45,263 INFO L78 Accepts]: Start accepts. Automaton has 4849 states and 16530 transitions. Word has length 27 [2021-07-13 20:22:45,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:45,263 INFO L482 AbstractCegarLoop]: Abstraction has 4849 states and 16530 transitions. [2021-07-13 20:22:45,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:45,264 INFO L276 IsEmpty]: Start isEmpty. Operand 4849 states and 16530 transitions. [2021-07-13 20:22:45,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:45,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:45,273 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:45,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:45,495 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:45,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:45,495 INFO L82 PathProgramCache]: Analyzing trace with hash 327227152, now seen corresponding path program 15 times [2021-07-13 20:22:45,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:45,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279209481] [2021-07-13 20:22:45,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:45,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:45,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279209481] [2021-07-13 20:22:45,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279209481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:45,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594643087] [2021-07-13 20:22:45,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:45,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:22:45,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:45,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:45,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:45,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594643087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:45,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:45,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:22:45,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962227046] [2021-07-13 20:22:45,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:22:45,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:45,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:22:45,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:22:45,676 INFO L87 Difference]: Start difference. First operand 4849 states and 16530 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:46,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:46,111 INFO L93 Difference]: Finished difference Result 6692 states and 22004 transitions. [2021-07-13 20:22:46,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:22:46,112 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:46,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:46,125 INFO L225 Difference]: With dead ends: 6692 [2021-07-13 20:22:46,125 INFO L226 Difference]: Without dead ends: 6692 [2021-07-13 20:22:46,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 199.9ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:22:46,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6692 states. [2021-07-13 20:22:46,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6692 to 4967. [2021-07-13 20:22:46,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4967 states, 4966 states have (on average 3.3987112364075713) internal successors, (16878), 4966 states have internal predecessors, (16878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:46,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4967 states to 4967 states and 16878 transitions. [2021-07-13 20:22:46,217 INFO L78 Accepts]: Start accepts. Automaton has 4967 states and 16878 transitions. Word has length 27 [2021-07-13 20:22:46,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:46,217 INFO L482 AbstractCegarLoop]: Abstraction has 4967 states and 16878 transitions. [2021-07-13 20:22:46,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:46,217 INFO L276 IsEmpty]: Start isEmpty. Operand 4967 states and 16878 transitions. [2021-07-13 20:22:46,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:46,224 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:46,224 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:46,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-13 20:22:46,425 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:46,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:46,426 INFO L82 PathProgramCache]: Analyzing trace with hash 921828852, now seen corresponding path program 16 times [2021-07-13 20:22:46,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:46,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311086749] [2021-07-13 20:22:46,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:46,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:46,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:46,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:46,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311086749] [2021-07-13 20:22:46,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311086749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:46,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319974842] [2021-07-13 20:22:46,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:46,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:22:46,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:46,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:22:46,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:46,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:46,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319974842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:46,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:46,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:22:46,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714070631] [2021-07-13 20:22:46,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:22:46,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:46,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:22:46,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:22:46,639 INFO L87 Difference]: Start difference. First operand 4967 states and 16878 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:47,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:47,049 INFO L93 Difference]: Finished difference Result 6568 states and 21695 transitions. [2021-07-13 20:22:47,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:22:47,049 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:47,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:47,062 INFO L225 Difference]: With dead ends: 6568 [2021-07-13 20:22:47,062 INFO L226 Difference]: Without dead ends: 6552 [2021-07-13 20:22:47,062 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 166.6ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:22:47,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6552 states. [2021-07-13 20:22:47,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6552 to 5075. [2021-07-13 20:22:47,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5075 states, 5074 states have (on average 3.3866771777690183) internal successors, (17184), 5074 states have internal predecessors, (17184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:47,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5075 states to 5075 states and 17184 transitions. [2021-07-13 20:22:47,177 INFO L78 Accepts]: Start accepts. Automaton has 5075 states and 17184 transitions. Word has length 27 [2021-07-13 20:22:47,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:47,177 INFO L482 AbstractCegarLoop]: Abstraction has 5075 states and 17184 transitions. [2021-07-13 20:22:47,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:47,177 INFO L276 IsEmpty]: Start isEmpty. Operand 5075 states and 17184 transitions. [2021-07-13 20:22:47,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:22:47,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:47,185 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:47,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:47,386 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:47,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:47,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1636343253, now seen corresponding path program 10 times [2021-07-13 20:22:47,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:47,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377547345] [2021-07-13 20:22:47,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:47,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:47,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377547345] [2021-07-13 20:22:47,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377547345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:47,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134143452] [2021-07-13 20:22:47,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:47,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:22:47,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:47,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:22:47,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:47,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:47,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134143452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:47,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:47,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 20:22:47,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146461866] [2021-07-13 20:22:47,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:22:47,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:47,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:22:47,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:22:47,496 INFO L87 Difference]: Start difference. First operand 5075 states and 17184 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-07-13 20:22:47,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:47,715 INFO L93 Difference]: Finished difference Result 5593 states and 18688 transitions. [2021-07-13 20:22:47,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:22:47,715 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:22:47,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:47,726 INFO L225 Difference]: With dead ends: 5593 [2021-07-13 20:22:47,726 INFO L226 Difference]: Without dead ends: 5593 [2021-07-13 20:22:47,726 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:22:47,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5593 states. [2021-07-13 20:22:47,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5593 to 4995. [2021-07-13 20:22:47,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4995 states, 4994 states have (on average 3.383660392470965) internal successors, (16898), 4994 states have internal predecessors, (16898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:47,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4995 states to 4995 states and 16898 transitions. [2021-07-13 20:22:47,804 INFO L78 Accepts]: Start accepts. Automaton has 4995 states and 16898 transitions. Word has length 27 [2021-07-13 20:22:47,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:47,804 INFO L482 AbstractCegarLoop]: Abstraction has 4995 states and 16898 transitions. [2021-07-13 20:22:47,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-07-13 20:22:47,804 INFO L276 IsEmpty]: Start isEmpty. Operand 4995 states and 16898 transitions. [2021-07-13 20:22:47,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:22:47,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:47,812 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:22:48,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-13 20:22:48,012 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:48,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:48,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1236304047, now seen corresponding path program 29 times [2021-07-13 20:22:48,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:48,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750107312] [2021-07-13 20:22:48,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:48,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:48,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:48,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:48,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750107312] [2021-07-13 20:22:48,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750107312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:48,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793438506] [2021-07-13 20:22:48,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:48,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:22:48,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:48,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:22:48,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:48,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 20:22:48,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:22:48,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:48,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:22:48,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-13 20:22:48,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:48,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793438506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:48,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:48,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:22:48,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514073378] [2021-07-13 20:22:48,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:22:48,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:48,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:22:48,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:22:48,341 INFO L87 Difference]: Start difference. First operand 4995 states and 16898 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:48,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:48,591 INFO L93 Difference]: Finished difference Result 5811 states and 19365 transitions. [2021-07-13 20:22:48,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:22:48,592 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:22:48,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:48,604 INFO L225 Difference]: With dead ends: 5811 [2021-07-13 20:22:48,604 INFO L226 Difference]: Without dead ends: 5742 [2021-07-13 20:22:48,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 206.4ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:22:48,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5742 states. [2021-07-13 20:22:48,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5742 to 5187. [2021-07-13 20:22:48,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5187 states, 5186 states have (on average 3.3814114924797534) internal successors, (17536), 5186 states have internal predecessors, (17536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:48,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5187 states to 5187 states and 17536 transitions. [2021-07-13 20:22:48,689 INFO L78 Accepts]: Start accepts. Automaton has 5187 states and 17536 transitions. Word has length 30 [2021-07-13 20:22:48,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:48,689 INFO L482 AbstractCegarLoop]: Abstraction has 5187 states and 17536 transitions. [2021-07-13 20:22:48,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:48,689 INFO L276 IsEmpty]: Start isEmpty. Operand 5187 states and 17536 transitions. [2021-07-13 20:22:48,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:22:48,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:48,696 INFO L508 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] [2021-07-13 20:22:48,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 20:22:48,897 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:48,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:48,897 INFO L82 PathProgramCache]: Analyzing trace with hash 745415110, now seen corresponding path program 11 times [2021-07-13 20:22:48,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:48,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103770491] [2021-07-13 20:22:48,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:49,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:49,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103770491] [2021-07-13 20:22:49,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103770491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:49,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920806069] [2021-07-13 20:22:49,375 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:49,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:22:49,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:49,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:22:49,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:49,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:49,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:49,644 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 19 treesize of output 11 [2021-07-13 20:22:49,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:22:49,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:49,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:22:49,651 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:22:49,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:49,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920806069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:49,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:49,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-07-13 20:22:49,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974551863] [2021-07-13 20:22:49,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:22:49,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:49,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:22:49,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:22:49,675 INFO L87 Difference]: Start difference. First operand 5187 states and 17536 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:50,875 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-07-13 20:22:51,729 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-07-13 20:22:52,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:52,540 INFO L93 Difference]: Finished difference Result 8307 states and 27178 transitions. [2021-07-13 20:22:52,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:22:52,541 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:22:52,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:52,556 INFO L225 Difference]: With dead ends: 8307 [2021-07-13 20:22:52,557 INFO L226 Difference]: Without dead ends: 8281 [2021-07-13 20:22:52,557 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 2542.4ms TimeCoverageRelationStatistics Valid=416, Invalid=3006, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:22:52,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8281 states. [2021-07-13 20:22:52,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8281 to 5254. [2021-07-13 20:22:52,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5254 states, 5253 states have (on average 3.379211878926328) internal successors, (17751), 5253 states have internal predecessors, (17751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:52,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5254 states to 5254 states and 17751 transitions. [2021-07-13 20:22:52,649 INFO L78 Accepts]: Start accepts. Automaton has 5254 states and 17751 transitions. Word has length 30 [2021-07-13 20:22:52,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:52,649 INFO L482 AbstractCegarLoop]: Abstraction has 5254 states and 17751 transitions. [2021-07-13 20:22:52,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:52,649 INFO L276 IsEmpty]: Start isEmpty. Operand 5254 states and 17751 transitions. [2021-07-13 20:22:52,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:22:52,656 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:52,656 INFO L508 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] [2021-07-13 20:22:52,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:52,857 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:52,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:52,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1233935798, now seen corresponding path program 12 times [2021-07-13 20:22:52,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:52,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096500068] [2021-07-13 20:22:52,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:53,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:53,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:53,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096500068] [2021-07-13 20:22:53,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096500068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:53,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068435766] [2021-07-13 20:22:53,088 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:53,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:22:53,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:22:53,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:22:53,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:53,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:53,395 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 19 treesize of output 27 [2021-07-13 20:22:53,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:22:53,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:53,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:22:53,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:43 [2021-07-13 20:22:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:53,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068435766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:53,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:53,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 27 [2021-07-13 20:22:53,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969217130] [2021-07-13 20:22:53,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:22:53,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:53,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:22:53,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:22:53,636 INFO L87 Difference]: Start difference. First operand 5254 states and 17751 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2021-07-13 20:22:56,354 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-07-13 20:22:57,547 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-07-13 20:22:57,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:22:57,554 INFO L93 Difference]: Finished difference Result 9505 states and 30456 transitions. [2021-07-13 20:22:57,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-13 20:22:57,561 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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 30 [2021-07-13 20:22:57,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:22:57,579 INFO L225 Difference]: With dead ends: 9505 [2021-07-13 20:22:57,579 INFO L226 Difference]: Without dead ends: 9445 [2021-07-13 20:22:57,580 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1872 ImplicationChecksByTransitivity, 3200.4ms TimeCoverageRelationStatistics Valid=674, Invalid=5332, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:22:57,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9445 states. [2021-07-13 20:22:57,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9445 to 5277. [2021-07-13 20:22:57,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5277 states, 5276 states have (on average 3.3788855193328278) internal successors, (17827), 5276 states have internal predecessors, (17827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:22:57,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5277 states to 5277 states and 17827 transitions. [2021-07-13 20:22:57,698 INFO L78 Accepts]: Start accepts. Automaton has 5277 states and 17827 transitions. Word has length 30 [2021-07-13 20:22:57,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:22:57,698 INFO L482 AbstractCegarLoop]: Abstraction has 5277 states and 17827 transitions. [2021-07-13 20:22:57,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2021-07-13 20:22:57,698 INFO L276 IsEmpty]: Start isEmpty. Operand 5277 states and 17827 transitions. [2021-07-13 20:22:57,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:22:57,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:22:57,706 INFO L508 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] [2021-07-13 20:22:57,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:57,907 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:22:57,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:22:57,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1698612030, now seen corresponding path program 13 times [2021-07-13 20:22:57,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:22:57,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847905773] [2021-07-13 20:22:57,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:22:57,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:58,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:58,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:22:58,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847905773] [2021-07-13 20:22:58,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847905773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:58,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572667279] [2021-07-13 20:22:58,245 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:22:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:22:58,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:22:58,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:22:58,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:22:58,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:22:58,496 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 19 treesize of output 11 [2021-07-13 20:22:58,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:22:58,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:22:58,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:22:58,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:22:58,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:22:58,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572667279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:22:58,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:22:58,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 20:22:58,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359094118] [2021-07-13 20:22:58,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:22:58,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:22:58,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:22:58,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:22:58,525 INFO L87 Difference]: Start difference. First operand 5277 states and 17827 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:00,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:00,555 INFO L93 Difference]: Finished difference Result 6564 states and 21312 transitions. [2021-07-13 20:23:00,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:23:00,555 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:23:00,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:00,569 INFO L225 Difference]: With dead ends: 6564 [2021-07-13 20:23:00,569 INFO L226 Difference]: Without dead ends: 6534 [2021-07-13 20:23:00,569 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 1674.0ms TimeCoverageRelationStatistics Valid=385, Invalid=2371, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:23:00,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6534 states. [2021-07-13 20:23:00,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6534 to 5285. [2021-07-13 20:23:00,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5285 states, 5284 states have (on average 3.3783118849356546) internal successors, (17851), 5284 states have internal predecessors, (17851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:00,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5285 states to 5285 states and 17851 transitions. [2021-07-13 20:23:00,660 INFO L78 Accepts]: Start accepts. Automaton has 5285 states and 17851 transitions. Word has length 30 [2021-07-13 20:23:00,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:00,660 INFO L482 AbstractCegarLoop]: Abstraction has 5285 states and 17851 transitions. [2021-07-13 20:23:00,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:00,660 INFO L276 IsEmpty]: Start isEmpty. Operand 5285 states and 17851 transitions. [2021-07-13 20:23:00,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:23:00,668 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:00,668 INFO L508 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] [2021-07-13 20:23:00,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-07-13 20:23:00,869 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:00,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:00,869 INFO L82 PathProgramCache]: Analyzing trace with hash -721957958, now seen corresponding path program 14 times [2021-07-13 20:23:00,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:00,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134841423] [2021-07-13 20:23:00,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:00,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:01,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:01,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:01,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134841423] [2021-07-13 20:23:01,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134841423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:01,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316779758] [2021-07-13 20:23:01,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:01,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:23:01,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:01,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:23:01,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:01,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:01,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:01,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:23:01,331 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:23:01,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:01,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:23:01,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-13 20:23:01,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:01,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316779758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:01,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:01,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 20:23:01,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263498398] [2021-07-13 20:23:01,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:23:01,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:01,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:23:01,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:23:01,408 INFO L87 Difference]: Start difference. First operand 5285 states and 17851 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:04,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:04,753 INFO L93 Difference]: Finished difference Result 6989 states and 22642 transitions. [2021-07-13 20:23:04,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 20:23:04,753 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:23:04,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:04,767 INFO L225 Difference]: With dead ends: 6989 [2021-07-13 20:23:04,767 INFO L226 Difference]: Without dead ends: 6943 [2021-07-13 20:23:04,767 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 2564.0ms TimeCoverageRelationStatistics Valid=557, Invalid=3999, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:23:04,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6943 states. [2021-07-13 20:23:04,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6943 to 5338. [2021-07-13 20:23:04,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5338 states, 5337 states have (on average 3.3814877271875585) internal successors, (18047), 5337 states have internal predecessors, (18047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:04,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5338 states to 5338 states and 18047 transitions. [2021-07-13 20:23:04,871 INFO L78 Accepts]: Start accepts. Automaton has 5338 states and 18047 transitions. Word has length 30 [2021-07-13 20:23:04,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:04,871 INFO L482 AbstractCegarLoop]: Abstraction has 5338 states and 18047 transitions. [2021-07-13 20:23:04,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:04,872 INFO L276 IsEmpty]: Start isEmpty. Operand 5338 states and 18047 transitions. [2021-07-13 20:23:04,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:23:04,879 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:04,880 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:05,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:05,080 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:05,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:05,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1665366353, now seen corresponding path program 17 times [2021-07-13 20:23:05,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:05,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512214922] [2021-07-13 20:23:05,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:05,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:05,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:05,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512214922] [2021-07-13 20:23:05,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512214922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:05,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351735705] [2021-07-13 20:23:05,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:05,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:23:05,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:05,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:23:05,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:05,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:05,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:05,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:05,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:05,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-13 20:23:05,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:23:05,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:05,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:23:05,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:23:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:05,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351735705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:05,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:05,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-07-13 20:23:05,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105770379] [2021-07-13 20:23:05,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:23:05,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:05,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:23:05,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:23:05,967 INFO L87 Difference]: Start difference. First operand 5338 states and 18047 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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) [2021-07-13 20:23:07,115 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-07-13 20:23:08,296 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-07-13 20:23:09,100 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-07-13 20:23:09,418 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-07-13 20:23:09,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:09,985 INFO L93 Difference]: Finished difference Result 7096 states and 23312 transitions. [2021-07-13 20:23:09,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:23:09,985 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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 30 [2021-07-13 20:23:09,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:09,999 INFO L225 Difference]: With dead ends: 7096 [2021-07-13 20:23:09,999 INFO L226 Difference]: Without dead ends: 7070 [2021-07-13 20:23:10,000 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 3512.0ms TimeCoverageRelationStatistics Valid=537, Invalid=4293, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:23:10,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7070 states. [2021-07-13 20:23:10,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7070 to 5425. [2021-07-13 20:23:10,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5425 states, 5424 states have (on average 3.3737094395280236) internal successors, (18299), 5424 states have internal predecessors, (18299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:10,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5425 states to 5425 states and 18299 transitions. [2021-07-13 20:23:10,093 INFO L78 Accepts]: Start accepts. Automaton has 5425 states and 18299 transitions. Word has length 30 [2021-07-13 20:23:10,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:10,094 INFO L482 AbstractCegarLoop]: Abstraction has 5425 states and 18299 transitions. [2021-07-13 20:23:10,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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) [2021-07-13 20:23:10,094 INFO L276 IsEmpty]: Start isEmpty. Operand 5425 states and 18299 transitions. [2021-07-13 20:23:10,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:23:10,102 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:10,102 INFO L508 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] [2021-07-13 20:23:10,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:10,303 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:10,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:10,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1512137484, now seen corresponding path program 15 times [2021-07-13 20:23:10,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:10,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310966825] [2021-07-13 20:23:10,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:10,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:10,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:10,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310966825] [2021-07-13 20:23:10,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310966825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:10,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889662215] [2021-07-13 20:23:10,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:10,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:23:10,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:10,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:23:10,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:10,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:10,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:10,914 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 19 treesize of output 11 [2021-07-13 20:23:10,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:23:10,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:10,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:23:10,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-07-13 20:23:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:10,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889662215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:10,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:10,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 20:23:10,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797392214] [2021-07-13 20:23:10,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:23:10,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:10,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:23:10,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:23:10,949 INFO L87 Difference]: Start difference. First operand 5425 states and 18299 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:12,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:12,788 INFO L93 Difference]: Finished difference Result 6660 states and 21646 transitions. [2021-07-13 20:23:12,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:23:12,789 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:23:12,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:12,802 INFO L225 Difference]: With dead ends: 6660 [2021-07-13 20:23:12,803 INFO L226 Difference]: Without dead ends: 6630 [2021-07-13 20:23:12,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1660.7ms TimeCoverageRelationStatistics Valid=349, Invalid=2101, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:23:12,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6630 states. [2021-07-13 20:23:12,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6630 to 5428. [2021-07-13 20:23:12,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5428 states, 5427 states have (on average 3.3738713838216325) internal successors, (18310), 5427 states have internal predecessors, (18310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:12,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5428 states to 5428 states and 18310 transitions. [2021-07-13 20:23:12,902 INFO L78 Accepts]: Start accepts. Automaton has 5428 states and 18310 transitions. Word has length 30 [2021-07-13 20:23:12,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:12,902 INFO L482 AbstractCegarLoop]: Abstraction has 5428 states and 18310 transitions. [2021-07-13 20:23:12,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:12,902 INFO L276 IsEmpty]: Start isEmpty. Operand 5428 states and 18310 transitions. [2021-07-13 20:23:12,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:23:12,910 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:12,910 INFO L508 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] [2021-07-13 20:23:13,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-07-13 20:23:13,111 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:13,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:13,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1854264556, now seen corresponding path program 16 times [2021-07-13 20:23:13,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:13,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852713109] [2021-07-13 20:23:13,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:13,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:13,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:13,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852713109] [2021-07-13 20:23:13,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852713109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:13,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660506189] [2021-07-13 20:23:13,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:13,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:23:13,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:13,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:23:13,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:13,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:13,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:13,715 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 19 treesize of output 11 [2021-07-13 20:23:13,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:23:13,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:13,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:23:13,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:23:13,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:13,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660506189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:13,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:13,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:23:13,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100906907] [2021-07-13 20:23:13,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:23:13,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:13,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:23:13,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:23:13,748 INFO L87 Difference]: Start difference. First operand 5428 states and 18310 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:15,788 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-07-13 20:23:16,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:16,213 INFO L93 Difference]: Finished difference Result 6861 states and 22152 transitions. [2021-07-13 20:23:16,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:23:16,213 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:23:16,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:16,226 INFO L225 Difference]: With dead ends: 6861 [2021-07-13 20:23:16,226 INFO L226 Difference]: Without dead ends: 6831 [2021-07-13 20:23:16,227 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 2096.9ms TimeCoverageRelationStatistics Valid=467, Invalid=2839, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:23:16,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6831 states. [2021-07-13 20:23:16,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6831 to 5431. [2021-07-13 20:23:16,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5431 states, 5430 states have (on average 3.3740331491712707) internal successors, (18321), 5430 states have internal predecessors, (18321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:16,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5431 states to 5431 states and 18321 transitions. [2021-07-13 20:23:16,336 INFO L78 Accepts]: Start accepts. Automaton has 5431 states and 18321 transitions. Word has length 30 [2021-07-13 20:23:16,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:16,337 INFO L482 AbstractCegarLoop]: Abstraction has 5431 states and 18321 transitions. [2021-07-13 20:23:16,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:16,337 INFO L276 IsEmpty]: Start isEmpty. Operand 5431 states and 18321 transitions. [2021-07-13 20:23:16,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:23:16,345 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:16,345 INFO L508 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] [2021-07-13 20:23:16,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:16,547 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:16,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:16,547 INFO L82 PathProgramCache]: Analyzing trace with hash 822848258, now seen corresponding path program 17 times [2021-07-13 20:23:16,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:16,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149258444] [2021-07-13 20:23:16,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:16,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:16,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:16,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149258444] [2021-07-13 20:23:16,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149258444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:16,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842115356] [2021-07-13 20:23:16,873 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:16,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:23:16,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:16,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:23:16,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:17,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:17,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:17,167 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 28 treesize of output 16 [2021-07-13 20:23:17,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:23:17,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:17,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:23:17,175 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-07-13 20:23:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:17,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842115356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:17,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:17,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-07-13 20:23:17,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764733918] [2021-07-13 20:23:17,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:23:17,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:17,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:23:17,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:23:17,201 INFO L87 Difference]: Start difference. First operand 5431 states and 18321 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:18,428 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-07-13 20:23:19,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:19,748 INFO L93 Difference]: Finished difference Result 6718 states and 21814 transitions. [2021-07-13 20:23:19,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:23:19,748 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:23:19,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:19,760 INFO L225 Difference]: With dead ends: 6718 [2021-07-13 20:23:19,760 INFO L226 Difference]: Without dead ends: 6688 [2021-07-13 20:23:19,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 2288.4ms TimeCoverageRelationStatistics Valid=430, Invalid=2762, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:23:19,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6688 states. [2021-07-13 20:23:19,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6688 to 5426. [2021-07-13 20:23:19,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5426 states, 5425 states have (on average 3.3741935483870966) internal successors, (18305), 5425 states have internal predecessors, (18305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:19,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5426 states to 5426 states and 18305 transitions. [2021-07-13 20:23:19,857 INFO L78 Accepts]: Start accepts. Automaton has 5426 states and 18305 transitions. Word has length 30 [2021-07-13 20:23:19,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:19,857 INFO L482 AbstractCegarLoop]: Abstraction has 5426 states and 18305 transitions. [2021-07-13 20:23:19,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:19,857 INFO L276 IsEmpty]: Start isEmpty. Operand 5426 states and 18305 transitions. [2021-07-13 20:23:19,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:23:19,899 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:19,899 INFO L508 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] [2021-07-13 20:23:20,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:20,100 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:20,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:20,100 INFO L82 PathProgramCache]: Analyzing trace with hash -727723502, now seen corresponding path program 18 times [2021-07-13 20:23:20,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:20,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193285952] [2021-07-13 20:23:20,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:20,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:20,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:20,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193285952] [2021-07-13 20:23:20,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193285952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:20,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562243313] [2021-07-13 20:23:20,309 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:20,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:23:20,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:20,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:23:20,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:20,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:20,543 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 19 treesize of output 27 [2021-07-13 20:23:20,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:23:20,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:20,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:23:20,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-07-13 20:23:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:20,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562243313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:20,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:20,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:23:20,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863291884] [2021-07-13 20:23:20,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:23:20,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:20,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:23:20,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:23:20,694 INFO L87 Difference]: Start difference. First operand 5426 states and 18305 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2021-07-13 20:23:22,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:22,906 INFO L93 Difference]: Finished difference Result 9647 states and 31226 transitions. [2021-07-13 20:23:22,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:23:22,906 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 30 [2021-07-13 20:23:22,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:22,930 INFO L225 Difference]: With dead ends: 9647 [2021-07-13 20:23:22,930 INFO L226 Difference]: Without dead ends: 9632 [2021-07-13 20:23:22,930 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 1540.0ms TimeCoverageRelationStatistics Valid=445, Invalid=3337, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:23:22,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9632 states. [2021-07-13 20:23:23,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9632 to 5430. [2021-07-13 20:23:23,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5430 states, 5429 states have (on average 3.375391416467121) internal successors, (18325), 5429 states have internal predecessors, (18325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:23,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5430 states to 5430 states and 18325 transitions. [2021-07-13 20:23:23,077 INFO L78 Accepts]: Start accepts. Automaton has 5430 states and 18325 transitions. Word has length 30 [2021-07-13 20:23:23,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:23,077 INFO L482 AbstractCegarLoop]: Abstraction has 5430 states and 18325 transitions. [2021-07-13 20:23:23,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2021-07-13 20:23:23,077 INFO L276 IsEmpty]: Start isEmpty. Operand 5430 states and 18325 transitions. [2021-07-13 20:23:23,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:23:23,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:23,086 INFO L508 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] [2021-07-13 20:23:23,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-07-13 20:23:23,286 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:23,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:23,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1710814064, now seen corresponding path program 19 times [2021-07-13 20:23:23,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:23,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041592856] [2021-07-13 20:23:23,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:23,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:23,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:23,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041592856] [2021-07-13 20:23:23,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041592856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:23,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737051496] [2021-07-13 20:23:23,484 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:23,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:23:23,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:23,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:23,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:23,771 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 19 treesize of output 11 [2021-07-13 20:23:23,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:23:23,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:23,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:23:23,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:23:23,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:23,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737051496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:23,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:23,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:23:23,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507132031] [2021-07-13 20:23:23,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:23:23,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:23,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:23:23,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:23:23,800 INFO L87 Difference]: Start difference. First operand 5430 states and 18325 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2021-07-13 20:23:27,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:27,175 INFO L93 Difference]: Finished difference Result 9941 states and 32572 transitions. [2021-07-13 20:23:27,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:23:27,175 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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 30 [2021-07-13 20:23:27,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:27,197 INFO L225 Difference]: With dead ends: 9941 [2021-07-13 20:23:27,197 INFO L226 Difference]: Without dead ends: 9926 [2021-07-13 20:23:27,198 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1804 ImplicationChecksByTransitivity, 2724.0ms TimeCoverageRelationStatistics Valid=728, Invalid=5124, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:23:27,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9926 states. [2021-07-13 20:23:27,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9926 to 5432. [2021-07-13 20:23:27,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5432 states, 5431 states have (on average 3.3758055606702264) internal successors, (18334), 5431 states have internal predecessors, (18334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:27,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5432 states to 5432 states and 18334 transitions. [2021-07-13 20:23:27,331 INFO L78 Accepts]: Start accepts. Automaton has 5432 states and 18334 transitions. Word has length 30 [2021-07-13 20:23:27,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:27,331 INFO L482 AbstractCegarLoop]: Abstraction has 5432 states and 18334 transitions. [2021-07-13 20:23:27,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2021-07-13 20:23:27,331 INFO L276 IsEmpty]: Start isEmpty. Operand 5432 states and 18334 transitions. [2021-07-13 20:23:27,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:23:27,340 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:27,340 INFO L508 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] [2021-07-13 20:23:27,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:27,540 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:27,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:27,541 INFO L82 PathProgramCache]: Analyzing trace with hash -811045396, now seen corresponding path program 20 times [2021-07-13 20:23:27,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:27,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573868387] [2021-07-13 20:23:27,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:27,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:27,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:27,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573868387] [2021-07-13 20:23:27,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573868387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:27,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546818817] [2021-07-13 20:23:27,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:27,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:23:27,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:27,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:23:27,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:27,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:27,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:27,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:23:27,981 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:23:27,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:27,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:23:27,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-13 20:23:28,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:28,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546818817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:28,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:28,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:23:28,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563276330] [2021-07-13 20:23:28,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:23:28,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:28,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:23:28,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:23:28,050 INFO L87 Difference]: Start difference. First operand 5432 states and 18334 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 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) [2021-07-13 20:23:32,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:32,189 INFO L93 Difference]: Finished difference Result 11162 states and 36367 transitions. [2021-07-13 20:23:32,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-13 20:23:32,189 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 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 30 [2021-07-13 20:23:32,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:32,215 INFO L225 Difference]: With dead ends: 11162 [2021-07-13 20:23:32,215 INFO L226 Difference]: Without dead ends: 11122 [2021-07-13 20:23:32,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 3099.5ms TimeCoverageRelationStatistics Valid=893, Invalid=6247, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:23:32,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11122 states. [2021-07-13 20:23:32,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11122 to 5474. [2021-07-13 20:23:32,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5474 states, 5473 states have (on average 3.379499360496985) internal successors, (18496), 5473 states have internal predecessors, (18496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:32,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5474 states to 5474 states and 18496 transitions. [2021-07-13 20:23:32,367 INFO L78 Accepts]: Start accepts. Automaton has 5474 states and 18496 transitions. Word has length 30 [2021-07-13 20:23:32,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:32,367 INFO L482 AbstractCegarLoop]: Abstraction has 5474 states and 18496 transitions. [2021-07-13 20:23:32,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 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) [2021-07-13 20:23:32,367 INFO L276 IsEmpty]: Start isEmpty. Operand 5474 states and 18496 transitions. [2021-07-13 20:23:32,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:23:32,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:32,375 INFO L508 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] [2021-07-13 20:23:32,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-07-13 20:23:32,576 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:32,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:32,576 INFO L82 PathProgramCache]: Analyzing trace with hash -871815986, now seen corresponding path program 21 times [2021-07-13 20:23:32,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:32,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680878293] [2021-07-13 20:23:32,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:32,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:32,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:32,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680878293] [2021-07-13 20:23:32,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680878293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:32,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2959221] [2021-07-13 20:23:32,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:32,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:23:32,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:32,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:23:32,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:33,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:33,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-07-13 20:23:33,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:23:33,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:33,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:23:33,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-07-13 20:23:33,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:33,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2959221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:33,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:33,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-07-13 20:23:33,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047637629] [2021-07-13 20:23:33,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:23:33,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:33,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:23:33,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:23:33,348 INFO L87 Difference]: Start difference. First operand 5474 states and 18496 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:34,822 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-07-13 20:23:36,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:36,415 INFO L93 Difference]: Finished difference Result 7786 states and 25626 transitions. [2021-07-13 20:23:36,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:23:36,415 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:23:36,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:36,432 INFO L225 Difference]: With dead ends: 7786 [2021-07-13 20:23:36,432 INFO L226 Difference]: Without dead ends: 7726 [2021-07-13 20:23:36,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 2674.9ms TimeCoverageRelationStatistics Valid=415, Invalid=2665, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:23:36,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7726 states. [2021-07-13 20:23:36,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7726 to 5478. [2021-07-13 20:23:36,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5478 states, 5477 states have (on average 3.3795873653459925) internal successors, (18510), 5477 states have internal predecessors, (18510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:36,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 18510 transitions. [2021-07-13 20:23:36,546 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 18510 transitions. Word has length 30 [2021-07-13 20:23:36,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:36,546 INFO L482 AbstractCegarLoop]: Abstraction has 5478 states and 18510 transitions. [2021-07-13 20:23:36,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:36,547 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 18510 transitions. [2021-07-13 20:23:36,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:23:36,555 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:36,555 INFO L508 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] [2021-07-13 20:23:36,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:36,756 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:36,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:36,756 INFO L82 PathProgramCache]: Analyzing trace with hash -462088070, now seen corresponding path program 22 times [2021-07-13 20:23:36,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:36,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799493673] [2021-07-13 20:23:36,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:36,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:37,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:37,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:37,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799493673] [2021-07-13 20:23:37,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799493673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:37,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354538534] [2021-07-13 20:23:37,090 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:37,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:23:37,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:37,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:23:37,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:37,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:37,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:37,373 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 19 treesize of output 11 [2021-07-13 20:23:37,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:23:37,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:37,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:23:37,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:23:37,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:37,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354538534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:37,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:37,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:23:37,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845052176] [2021-07-13 20:23:37,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:23:37,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:37,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:23:37,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:23:37,406 INFO L87 Difference]: Start difference. First operand 5478 states and 18510 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:39,596 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-07-13 20:23:39,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:39,998 INFO L93 Difference]: Finished difference Result 7437 states and 24428 transitions. [2021-07-13 20:23:39,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:23:39,998 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:23:39,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:40,012 INFO L225 Difference]: With dead ends: 7437 [2021-07-13 20:23:40,012 INFO L226 Difference]: Without dead ends: 7422 [2021-07-13 20:23:40,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 2268.1ms TimeCoverageRelationStatistics Valid=550, Invalid=3110, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:23:40,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7422 states. [2021-07-13 20:23:40,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7422 to 5480. [2021-07-13 20:23:40,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5480 states, 5479 states have (on average 3.37999634969885) internal successors, (18519), 5479 states have internal predecessors, (18519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:40,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5480 states to 5480 states and 18519 transitions. [2021-07-13 20:23:40,104 INFO L78 Accepts]: Start accepts. Automaton has 5480 states and 18519 transitions. Word has length 30 [2021-07-13 20:23:40,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:40,105 INFO L482 AbstractCegarLoop]: Abstraction has 5480 states and 18519 transitions. [2021-07-13 20:23:40,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:40,105 INFO L276 IsEmpty]: Start isEmpty. Operand 5480 states and 18519 transitions. [2021-07-13 20:23:40,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:23:40,112 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:40,112 INFO L508 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] [2021-07-13 20:23:40,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-13 20:23:40,313 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:40,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:40,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1933873822, now seen corresponding path program 23 times [2021-07-13 20:23:40,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:40,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693637921] [2021-07-13 20:23:40,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:40,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:40,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:40,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693637921] [2021-07-13 20:23:40,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693637921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:40,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383403358] [2021-07-13 20:23:40,635 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:40,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:23:40,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:40,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:23:40,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:40,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:40,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:40,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:23:40,791 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:23:40,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:40,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:23:40,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-13 20:23:40,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:40,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383403358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:40,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:40,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 20:23:40,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885052789] [2021-07-13 20:23:40,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:23:40,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:40,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:23:40,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:23:40,857 INFO L87 Difference]: Start difference. First operand 5480 states and 18519 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:45,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:45,132 INFO L93 Difference]: Finished difference Result 8651 states and 28099 transitions. [2021-07-13 20:23:45,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-13 20:23:45,133 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:23:45,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:45,153 INFO L225 Difference]: With dead ends: 8651 [2021-07-13 20:23:45,153 INFO L226 Difference]: Without dead ends: 8626 [2021-07-13 20:23:45,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 3588.5ms TimeCoverageRelationStatistics Valid=720, Invalid=5442, Unknown=0, NotChecked=0, Total=6162 [2021-07-13 20:23:45,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8626 states. [2021-07-13 20:23:45,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8626 to 5486. [2021-07-13 20:23:45,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5486 states, 5485 states have (on average 3.3808568824065635) internal successors, (18544), 5485 states have internal predecessors, (18544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:45,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5486 states to 5486 states and 18544 transitions. [2021-07-13 20:23:45,287 INFO L78 Accepts]: Start accepts. Automaton has 5486 states and 18544 transitions. Word has length 30 [2021-07-13 20:23:45,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:45,287 INFO L482 AbstractCegarLoop]: Abstraction has 5486 states and 18544 transitions. [2021-07-13 20:23:45,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:45,287 INFO L276 IsEmpty]: Start isEmpty. Operand 5486 states and 18544 transitions. [2021-07-13 20:23:45,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:23:45,296 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:45,296 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:45,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-13 20:23:45,496 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:45,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:45,497 INFO L82 PathProgramCache]: Analyzing trace with hash 372399859, now seen corresponding path program 18 times [2021-07-13 20:23:45,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:45,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451484184] [2021-07-13 20:23:45,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:46,016 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:46,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:46,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451484184] [2021-07-13 20:23:46,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451484184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:46,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829038278] [2021-07-13 20:23:46,016 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:46,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:23:46,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:46,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:23:46,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:46,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:46,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:46,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:46,305 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 21 treesize of output 37 [2021-07-13 20:23:46,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:23:46,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:46,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:23:46,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:18 [2021-07-13 20:23:46,414 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:46,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829038278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:46,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:46,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-07-13 20:23:46,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439621994] [2021-07-13 20:23:46,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:23:46,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:46,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:23:46,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:23:46,416 INFO L87 Difference]: Start difference. First operand 5486 states and 18544 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:48,891 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-07-13 20:23:50,483 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-07-13 20:23:51,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:51,989 INFO L93 Difference]: Finished difference Result 8032 states and 26021 transitions. [2021-07-13 20:23:51,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-13 20:23:51,990 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:23:51,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:52,006 INFO L225 Difference]: With dead ends: 8032 [2021-07-13 20:23:52,006 INFO L226 Difference]: Without dead ends: 7995 [2021-07-13 20:23:52,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2553 ImplicationChecksByTransitivity, 4645.2ms TimeCoverageRelationStatistics Valid=950, Invalid=7606, Unknown=0, NotChecked=0, Total=8556 [2021-07-13 20:23:52,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7995 states. [2021-07-13 20:23:52,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7995 to 5520. [2021-07-13 20:23:52,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5520 states, 5519 states have (on average 3.3812284834209096) internal successors, (18661), 5519 states have internal predecessors, (18661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:52,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5520 states to 5520 states and 18661 transitions. [2021-07-13 20:23:52,107 INFO L78 Accepts]: Start accepts. Automaton has 5520 states and 18661 transitions. Word has length 30 [2021-07-13 20:23:52,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:52,107 INFO L482 AbstractCegarLoop]: Abstraction has 5520 states and 18661 transitions. [2021-07-13 20:23:52,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:52,108 INFO L276 IsEmpty]: Start isEmpty. Operand 5520 states and 18661 transitions. [2021-07-13 20:23:52,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:23:52,115 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:52,115 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:52,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-07-13 20:23:52,316 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:52,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:52,316 INFO L82 PathProgramCache]: Analyzing trace with hash 577548821, now seen corresponding path program 19 times [2021-07-13 20:23:52,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:52,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203093536] [2021-07-13 20:23:52,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:52,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:52,673 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:52,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:52,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203093536] [2021-07-13 20:23:52,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203093536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:52,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56059670] [2021-07-13 20:23:52,673 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:52,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:23:52,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:52,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:52,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:52,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:52,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:23:52,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-13 20:23:52,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:23:52,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:52,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:23:52,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:23:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:52,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56059670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:52,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:52,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-07-13 20:23:52,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048592733] [2021-07-13 20:23:52,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:23:52,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:52,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:23:52,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:23:52,951 INFO L87 Difference]: Start difference. First operand 5520 states and 18661 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:56,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:23:56,218 INFO L93 Difference]: Finished difference Result 9535 states and 31254 transitions. [2021-07-13 20:23:56,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:23:56,218 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:23:56,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:23:56,238 INFO L225 Difference]: With dead ends: 9535 [2021-07-13 20:23:56,238 INFO L226 Difference]: Without dead ends: 9505 [2021-07-13 20:23:56,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 2800.9ms TimeCoverageRelationStatistics Valid=693, Invalid=3863, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:23:56,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9505 states. [2021-07-13 20:23:56,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9505 to 5583. [2021-07-13 20:23:56,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5583 states, 5582 states have (on average 3.3885704048728056) internal successors, (18915), 5582 states have internal predecessors, (18915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:56,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5583 states to 5583 states and 18915 transitions. [2021-07-13 20:23:56,368 INFO L78 Accepts]: Start accepts. Automaton has 5583 states and 18915 transitions. Word has length 30 [2021-07-13 20:23:56,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:23:56,368 INFO L482 AbstractCegarLoop]: Abstraction has 5583 states and 18915 transitions. [2021-07-13 20:23:56,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:23:56,368 INFO L276 IsEmpty]: Start isEmpty. Operand 5583 states and 18915 transitions. [2021-07-13 20:23:56,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:23:56,376 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:23:56,376 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:23:56,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:56,576 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:23:56,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:23:56,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1944310639, now seen corresponding path program 20 times [2021-07-13 20:23:56,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:23:56,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035072131] [2021-07-13 20:23:56,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:23:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:23:56,999 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:56,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:23:56,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035072131] [2021-07-13 20:23:56,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035072131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:56,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666927367] [2021-07-13 20:23:56,999 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:23:57,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:23:57,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:23:57,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:23:57,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:23:57,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:57,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:57,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:23:57,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:57,237 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 25 treesize of output 43 [2021-07-13 20:23:57,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:23:57,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:23:57,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:23:57,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:15 [2021-07-13 20:23:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:23:57,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666927367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:23:57,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:23:57,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-07-13 20:23:57,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430341456] [2021-07-13 20:23:57,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:23:57,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:23:57,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:23:57,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:23:57,335 INFO L87 Difference]: Start difference. First operand 5583 states and 18915 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2021-07-13 20:23:57,473 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-07-13 20:23:57,978 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-07-13 20:23:58,100 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2021-07-13 20:24:01,084 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-07-13 20:24:02,507 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-07-13 20:24:04,540 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-07-13 20:24:05,621 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-07-13 20:24:06,024 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-07-13 20:24:06,438 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-07-13 20:24:06,598 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-07-13 20:24:07,092 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-07-13 20:24:08,571 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-07-13 20:24:08,734 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-07-13 20:24:09,089 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-07-13 20:24:09,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:09,452 INFO L93 Difference]: Finished difference Result 11977 states and 38541 transitions. [2021-07-13 20:24:09,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-07-13 20:24:09,452 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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 30 [2021-07-13 20:24:09,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:09,480 INFO L225 Difference]: With dead ends: 11977 [2021-07-13 20:24:09,480 INFO L226 Difference]: Without dead ends: 11930 [2021-07-13 20:24:09,481 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11084 ImplicationChecksByTransitivity, 10747.3ms TimeCoverageRelationStatistics Valid=3976, Invalid=22756, Unknown=0, NotChecked=0, Total=26732 [2021-07-13 20:24:09,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11930 states. [2021-07-13 20:24:09,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11930 to 5693. [2021-07-13 20:24:09,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5693 states, 5692 states have (on average 3.3979269149683766) internal successors, (19341), 5692 states have internal predecessors, (19341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:09,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5693 states to 5693 states and 19341 transitions. [2021-07-13 20:24:09,646 INFO L78 Accepts]: Start accepts. Automaton has 5693 states and 19341 transitions. Word has length 30 [2021-07-13 20:24:09,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:09,646 INFO L482 AbstractCegarLoop]: Abstraction has 5693 states and 19341 transitions. [2021-07-13 20:24:09,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2021-07-13 20:24:09,647 INFO L276 IsEmpty]: Start isEmpty. Operand 5693 states and 19341 transitions. [2021-07-13 20:24:09,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:24:09,656 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:09,656 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:24:09,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-13 20:24:09,856 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:09,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:09,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1119676269, now seen corresponding path program 21 times [2021-07-13 20:24:09,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:09,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845209185] [2021-07-13 20:24:09,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:09,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:10,377 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:10,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:10,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845209185] [2021-07-13 20:24:10,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845209185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:10,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595051798] [2021-07-13 20:24:10,377 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:10,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:24:10,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:24:10,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:24:10,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:10,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:10,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:10,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:24:10,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:24:10,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-13 20:24:10,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:24:10,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:10,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:24:10,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:24:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:10,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595051798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:10,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:10,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-07-13 20:24:10,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365380594] [2021-07-13 20:24:10,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:24:10,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:10,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:24:10,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:24:10,730 INFO L87 Difference]: Start difference. First operand 5693 states and 19341 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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) [2021-07-13 20:24:12,810 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-07-13 20:24:13,959 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-07-13 20:24:14,440 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-07-13 20:24:14,914 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 32 [2021-07-13 20:24:15,139 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-07-13 20:24:15,726 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-07-13 20:24:16,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:16,290 INFO L93 Difference]: Finished difference Result 7655 states and 25147 transitions. [2021-07-13 20:24:16,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 20:24:16,291 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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 30 [2021-07-13 20:24:16,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:16,305 INFO L225 Difference]: With dead ends: 7655 [2021-07-13 20:24:16,305 INFO L226 Difference]: Without dead ends: 7629 [2021-07-13 20:24:16,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1999 ImplicationChecksByTransitivity, 4722.6ms TimeCoverageRelationStatistics Valid=738, Invalid=6234, Unknown=0, NotChecked=0, Total=6972 [2021-07-13 20:24:16,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7629 states. [2021-07-13 20:24:16,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7629 to 5684. [2021-07-13 20:24:16,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5684 states, 5683 states have (on average 3.39767728312511) internal successors, (19309), 5683 states have internal predecessors, (19309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:16,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5684 states to 5684 states and 19309 transitions. [2021-07-13 20:24:16,404 INFO L78 Accepts]: Start accepts. Automaton has 5684 states and 19309 transitions. Word has length 30 [2021-07-13 20:24:16,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:16,405 INFO L482 AbstractCegarLoop]: Abstraction has 5684 states and 19309 transitions. [2021-07-13 20:24:16,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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) [2021-07-13 20:24:16,405 INFO L276 IsEmpty]: Start isEmpty. Operand 5684 states and 19309 transitions. [2021-07-13 20:24:16,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:24:16,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:16,413 INFO L508 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] [2021-07-13 20:24:16,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-13 20:24:16,613 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:16,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:16,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1069732346, now seen corresponding path program 24 times [2021-07-13 20:24:16,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:16,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936828814] [2021-07-13 20:24:16,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:16,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:16,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936828814] [2021-07-13 20:24:16,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936828814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:16,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596342810] [2021-07-13 20:24:16,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:16,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:24:16,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:24:16,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:24:16,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:17,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:17,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:24:17,113 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 19 treesize of output 11 [2021-07-13 20:24:17,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:24:17,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:17,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:24:17,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:24:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:17,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596342810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:17,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:17,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 20:24:17,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341502452] [2021-07-13 20:24:17,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:24:17,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:17,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:24:17,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:24:17,180 INFO L87 Difference]: Start difference. First operand 5684 states and 19309 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:19,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:19,076 INFO L93 Difference]: Finished difference Result 6886 states and 22588 transitions. [2021-07-13 20:24:19,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:24:19,077 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:24:19,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:19,091 INFO L225 Difference]: With dead ends: 6886 [2021-07-13 20:24:19,091 INFO L226 Difference]: Without dead ends: 6871 [2021-07-13 20:24:19,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1530.4ms TimeCoverageRelationStatistics Valid=318, Invalid=2132, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:24:19,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6871 states. [2021-07-13 20:24:19,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6871 to 5694. [2021-07-13 20:24:19,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5694 states, 5693 states have (on average 3.3975057087651503) internal successors, (19342), 5693 states have internal predecessors, (19342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:19,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5694 states to 5694 states and 19342 transitions. [2021-07-13 20:24:19,233 INFO L78 Accepts]: Start accepts. Automaton has 5694 states and 19342 transitions. Word has length 30 [2021-07-13 20:24:19,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:19,233 INFO L482 AbstractCegarLoop]: Abstraction has 5694 states and 19342 transitions. [2021-07-13 20:24:19,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:19,233 INFO L276 IsEmpty]: Start isEmpty. Operand 5694 states and 19342 transitions. [2021-07-13 20:24:19,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:24:19,242 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:19,242 INFO L508 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] [2021-07-13 20:24:19,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:19,443 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:19,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:19,443 INFO L82 PathProgramCache]: Analyzing trace with hash 804664962, now seen corresponding path program 25 times [2021-07-13 20:24:19,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:19,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985876914] [2021-07-13 20:24:19,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:19,697 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:19,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:19,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985876914] [2021-07-13 20:24:19,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985876914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:19,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557859128] [2021-07-13 20:24:19,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:19,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:24:19,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:19,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:19,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:24:19,927 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 19 treesize of output 11 [2021-07-13 20:24:19,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:24:19,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:19,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:24:19,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:24:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:19,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557859128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:19,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:19,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:24:19,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828057130] [2021-07-13 20:24:19,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:24:19,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:19,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:24:19,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:24:19,961 INFO L87 Difference]: Start difference. First operand 5694 states and 19342 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:21,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:21,595 INFO L93 Difference]: Finished difference Result 6877 states and 22547 transitions. [2021-07-13 20:24:21,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:24:21,595 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:24:21,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:21,607 INFO L225 Difference]: With dead ends: 6877 [2021-07-13 20:24:21,607 INFO L226 Difference]: Without dead ends: 6847 [2021-07-13 20:24:21,608 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1392.9ms TimeCoverageRelationStatistics Valid=332, Invalid=2020, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:24:21,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6847 states. [2021-07-13 20:24:21,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6847 to 5686. [2021-07-13 20:24:21,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5686 states, 5685 states have (on average 3.39806508355321) internal successors, (19318), 5685 states have internal predecessors, (19318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:21,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5686 states to 5686 states and 19318 transitions. [2021-07-13 20:24:21,698 INFO L78 Accepts]: Start accepts. Automaton has 5686 states and 19318 transitions. Word has length 30 [2021-07-13 20:24:21,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:21,698 INFO L482 AbstractCegarLoop]: Abstraction has 5686 states and 19318 transitions. [2021-07-13 20:24:21,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:21,698 INFO L276 IsEmpty]: Start isEmpty. Operand 5686 states and 19318 transitions. [2021-07-13 20:24:21,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:24:21,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:21,705 INFO L508 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] [2021-07-13 20:24:21,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:21,906 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:21,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:21,907 INFO L82 PathProgramCache]: Analyzing trace with hash -2028611540, now seen corresponding path program 26 times [2021-07-13 20:24:21,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:21,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994097103] [2021-07-13 20:24:21,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:21,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:22,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:22,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:22,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994097103] [2021-07-13 20:24:22,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994097103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:22,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818827569] [2021-07-13 20:24:22,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:22,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:24:22,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:24:22,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:24:22,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:22,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:22,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:22,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:24:22,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:22,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2021-07-13 20:24:22,472 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:24:22,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:22,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:24:22,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-07-13 20:24:22,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:22,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818827569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:22,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:22,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-07-13 20:24:22,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988834825] [2021-07-13 20:24:22,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:24:22,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:22,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:24:22,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:24:22,547 INFO L87 Difference]: Start difference. First operand 5686 states and 19318 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:25,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:25,327 INFO L93 Difference]: Finished difference Result 10041 states and 32850 transitions. [2021-07-13 20:24:25,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:24:25,327 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:24:25,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:25,348 INFO L225 Difference]: With dead ends: 10041 [2021-07-13 20:24:25,349 INFO L226 Difference]: Without dead ends: 9990 [2021-07-13 20:24:25,349 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 2181.8ms TimeCoverageRelationStatistics Valid=588, Invalid=3444, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:24:25,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9990 states. [2021-07-13 20:24:25,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9990 to 5722. [2021-07-13 20:24:25,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5722 states, 5721 states have (on average 3.3997552875371437) internal successors, (19450), 5721 states have internal predecessors, (19450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:25,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5722 states to 5722 states and 19450 transitions. [2021-07-13 20:24:25,510 INFO L78 Accepts]: Start accepts. Automaton has 5722 states and 19450 transitions. Word has length 30 [2021-07-13 20:24:25,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:25,510 INFO L482 AbstractCegarLoop]: Abstraction has 5722 states and 19450 transitions. [2021-07-13 20:24:25,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:25,510 INFO L276 IsEmpty]: Start isEmpty. Operand 5722 states and 19450 transitions. [2021-07-13 20:24:25,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:24:25,518 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:25,519 INFO L508 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] [2021-07-13 20:24:25,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:25,719 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:25,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:25,720 INFO L82 PathProgramCache]: Analyzing trace with hash 904208534, now seen corresponding path program 27 times [2021-07-13 20:24:25,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:25,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628562476] [2021-07-13 20:24:25,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:25,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:25,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:25,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:25,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628562476] [2021-07-13 20:24:25,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628562476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:25,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068141838] [2021-07-13 20:24:25,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:26,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:24:26,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:24:26,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:24:26,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:26,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:26,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-07-13 20:24:26,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:24:26,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:26,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:24:26,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-07-13 20:24:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:26,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068141838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:26,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:26,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-07-13 20:24:26,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346507098] [2021-07-13 20:24:26,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:24:26,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:26,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:24:26,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:24:26,425 INFO L87 Difference]: Start difference. First operand 5722 states and 19450 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:27,701 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-07-13 20:24:29,801 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-07-13 20:24:32,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:32,720 INFO L93 Difference]: Finished difference Result 9402 states and 30638 transitions. [2021-07-13 20:24:32,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-07-13 20:24:32,720 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:24:32,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:32,738 INFO L225 Difference]: With dead ends: 9402 [2021-07-13 20:24:32,738 INFO L226 Difference]: Without dead ends: 9361 [2021-07-13 20:24:32,738 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 4953.9ms TimeCoverageRelationStatistics Valid=1092, Invalid=9008, Unknown=0, NotChecked=0, Total=10100 [2021-07-13 20:24:32,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9361 states. [2021-07-13 20:24:32,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9361 to 5721. [2021-07-13 20:24:32,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5721 states, 5720 states have (on average 3.3998251748251747) internal successors, (19447), 5720 states have internal predecessors, (19447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:32,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5721 states to 5721 states and 19447 transitions. [2021-07-13 20:24:32,853 INFO L78 Accepts]: Start accepts. Automaton has 5721 states and 19447 transitions. Word has length 30 [2021-07-13 20:24:32,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:32,853 INFO L482 AbstractCegarLoop]: Abstraction has 5721 states and 19447 transitions. [2021-07-13 20:24:32,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:32,854 INFO L276 IsEmpty]: Start isEmpty. Operand 5721 states and 19447 transitions. [2021-07-13 20:24:32,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:24:32,861 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:32,861 INFO L508 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] [2021-07-13 20:24:33,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-07-13 20:24:33,062 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:33,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:33,062 INFO L82 PathProgramCache]: Analyzing trace with hash 981599646, now seen corresponding path program 28 times [2021-07-13 20:24:33,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:33,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271277570] [2021-07-13 20:24:33,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:33,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:33,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271277570] [2021-07-13 20:24:33,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271277570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:33,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154393944] [2021-07-13 20:24:33,304 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:33,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:24:33,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:24:33,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:24:33,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:33,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:33,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:24:33,553 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 19 treesize of output 11 [2021-07-13 20:24:33,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:24:33,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:33,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:24:33,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:24:33,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:33,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154393944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:33,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:33,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:24:33,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998366613] [2021-07-13 20:24:33,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:24:33,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:33,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:24:33,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:24:33,582 INFO L87 Difference]: Start difference. First operand 5721 states and 19447 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:35,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:35,139 INFO L93 Difference]: Finished difference Result 7360 states and 24539 transitions. [2021-07-13 20:24:35,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:24:35,139 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:24:35,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:35,152 INFO L225 Difference]: With dead ends: 7360 [2021-07-13 20:24:35,152 INFO L226 Difference]: Without dead ends: 7345 [2021-07-13 20:24:35,153 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1362.9ms TimeCoverageRelationStatistics Valid=306, Invalid=1856, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:24:35,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7345 states. [2021-07-13 20:24:35,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7345 to 5726. [2021-07-13 20:24:35,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5726 states, 5725 states have (on average 3.399475982532751) internal successors, (19462), 5725 states have internal predecessors, (19462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:35,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5726 states to 5726 states and 19462 transitions. [2021-07-13 20:24:35,244 INFO L78 Accepts]: Start accepts. Automaton has 5726 states and 19462 transitions. Word has length 30 [2021-07-13 20:24:35,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:35,244 INFO L482 AbstractCegarLoop]: Abstraction has 5726 states and 19462 transitions. [2021-07-13 20:24:35,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:35,244 INFO L276 IsEmpty]: Start isEmpty. Operand 5726 states and 19462 transitions. [2021-07-13 20:24:35,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:24:35,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:35,252 INFO L508 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] [2021-07-13 20:24:35,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:35,453 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:35,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:35,453 INFO L82 PathProgramCache]: Analyzing trace with hash -932624076, now seen corresponding path program 29 times [2021-07-13 20:24:35,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:35,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351510977] [2021-07-13 20:24:35,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:35,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:35,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:35,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:35,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351510977] [2021-07-13 20:24:35,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351510977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:35,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126872701] [2021-07-13 20:24:35,699 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:35,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:24:35,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:24:35,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:24:35,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:35,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:35,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:24:35,930 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 28 treesize of output 16 [2021-07-13 20:24:35,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:24:35,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:35,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:24:35,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-07-13 20:24:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:35,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126872701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:35,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:35,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 20:24:35,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963906852] [2021-07-13 20:24:35,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:24:35,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:35,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:24:35,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:24:35,959 INFO L87 Difference]: Start difference. First operand 5726 states and 19462 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:37,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:37,516 INFO L93 Difference]: Finished difference Result 7333 states and 24469 transitions. [2021-07-13 20:24:37,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:24:37,517 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:24:37,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:37,531 INFO L225 Difference]: With dead ends: 7333 [2021-07-13 20:24:37,531 INFO L226 Difference]: Without dead ends: 7318 [2021-07-13 20:24:37,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1341.5ms TimeCoverageRelationStatistics Valid=299, Invalid=1593, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:24:37,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7318 states. [2021-07-13 20:24:37,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7318 to 5723. [2021-07-13 20:24:37,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5723 states, 5722 states have (on average 3.399860188745194) internal successors, (19454), 5722 states have internal predecessors, (19454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:37,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5723 states to 5723 states and 19454 transitions. [2021-07-13 20:24:37,631 INFO L78 Accepts]: Start accepts. Automaton has 5723 states and 19454 transitions. Word has length 30 [2021-07-13 20:24:37,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:37,631 INFO L482 AbstractCegarLoop]: Abstraction has 5723 states and 19454 transitions. [2021-07-13 20:24:37,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:37,631 INFO L276 IsEmpty]: Start isEmpty. Operand 5723 states and 19454 transitions. [2021-07-13 20:24:37,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:24:37,639 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:37,639 INFO L508 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] [2021-07-13 20:24:37,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:37,840 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:37,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:37,840 INFO L82 PathProgramCache]: Analyzing trace with hash 946570758, now seen corresponding path program 30 times [2021-07-13 20:24:37,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:37,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341523186] [2021-07-13 20:24:37,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:37,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:38,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:38,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:38,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341523186] [2021-07-13 20:24:38,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341523186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:38,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461795952] [2021-07-13 20:24:38,174 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:38,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:24:38,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:24:38,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:24:38,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:38,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:38,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:38,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:24:38,344 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:24:38,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:38,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:24:38,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-13 20:24:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:38,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461795952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:38,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:38,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 20:24:38,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711064889] [2021-07-13 20:24:38,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:24:38,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:38,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:24:38,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:24:38,415 INFO L87 Difference]: Start difference. First operand 5723 states and 19454 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:41,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:41,771 INFO L93 Difference]: Finished difference Result 7729 states and 25674 transitions. [2021-07-13 20:24:41,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 20:24:41,772 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:24:41,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:41,786 INFO L225 Difference]: With dead ends: 7729 [2021-07-13 20:24:41,787 INFO L226 Difference]: Without dead ends: 7704 [2021-07-13 20:24:41,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 2836.1ms TimeCoverageRelationStatistics Valid=615, Invalid=4077, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:24:41,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7704 states. [2021-07-13 20:24:41,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7704 to 5705. [2021-07-13 20:24:41,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5705 states, 5704 states have (on average 3.399193548387097) internal successors, (19389), 5704 states have internal predecessors, (19389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:41,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5705 states to 5705 states and 19389 transitions. [2021-07-13 20:24:41,885 INFO L78 Accepts]: Start accepts. Automaton has 5705 states and 19389 transitions. Word has length 30 [2021-07-13 20:24:41,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:41,885 INFO L482 AbstractCegarLoop]: Abstraction has 5705 states and 19389 transitions. [2021-07-13 20:24:41,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:41,885 INFO L276 IsEmpty]: Start isEmpty. Operand 5705 states and 19389 transitions. [2021-07-13 20:24:41,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:24:41,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:41,893 INFO L508 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] [2021-07-13 20:24:42,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-07-13 20:24:42,094 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:42,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:42,094 INFO L82 PathProgramCache]: Analyzing trace with hash -2078010192, now seen corresponding path program 31 times [2021-07-13 20:24:42,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:42,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561387885] [2021-07-13 20:24:42,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:42,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:42,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:42,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561387885] [2021-07-13 20:24:42,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561387885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:42,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868626300] [2021-07-13 20:24:42,429 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:42,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:42,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:24:42,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:42,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:42,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:24:42,733 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 19 treesize of output 11 [2021-07-13 20:24:42,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:24:42,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:42,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:24:42,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:24:42,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:42,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868626300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:42,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:42,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:24:42,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211949344] [2021-07-13 20:24:42,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:24:42,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:42,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:24:42,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:24:42,761 INFO L87 Difference]: Start difference. First operand 5705 states and 19389 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:44,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:44,969 INFO L93 Difference]: Finished difference Result 7595 states and 25322 transitions. [2021-07-13 20:24:44,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:24:44,970 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:24:44,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:44,991 INFO L225 Difference]: With dead ends: 7595 [2021-07-13 20:24:44,991 INFO L226 Difference]: Without dead ends: 7580 [2021-07-13 20:24:44,992 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1886.7ms TimeCoverageRelationStatistics Valid=427, Invalid=2543, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:24:45,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7580 states. [2021-07-13 20:24:45,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7580 to 5709. [2021-07-13 20:24:45,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5709 states, 5708 states have (on average 3.399614576033637) internal successors, (19405), 5708 states have internal predecessors, (19405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:45,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5709 states to 5709 states and 19405 transitions. [2021-07-13 20:24:45,147 INFO L78 Accepts]: Start accepts. Automaton has 5709 states and 19405 transitions. Word has length 30 [2021-07-13 20:24:45,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:45,148 INFO L482 AbstractCegarLoop]: Abstraction has 5709 states and 19405 transitions. [2021-07-13 20:24:45,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:45,148 INFO L276 IsEmpty]: Start isEmpty. Operand 5709 states and 19405 transitions. [2021-07-13 20:24:45,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:24:45,158 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:45,158 INFO L508 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] [2021-07-13 20:24:45,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-13 20:24:45,359 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:45,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:45,359 INFO L82 PathProgramCache]: Analyzing trace with hash -272462056, now seen corresponding path program 32 times [2021-07-13 20:24:45,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:45,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584724544] [2021-07-13 20:24:45,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:45,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:45,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:45,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584724544] [2021-07-13 20:24:45,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584724544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:45,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480645586] [2021-07-13 20:24:45,624 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:45,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:24:45,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:24:45,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:24:45,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:45,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:45,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:45,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:24:45,802 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:24:45,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:45,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:24:45,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-13 20:24:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:45,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480645586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:45,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:45,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:24:45,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093833379] [2021-07-13 20:24:45,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:24:45,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:45,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:24:45,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:24:45,874 INFO L87 Difference]: Start difference. First operand 5709 states and 19405 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:49,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:49,727 INFO L93 Difference]: Finished difference Result 8496 states and 28174 transitions. [2021-07-13 20:24:49,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-13 20:24:49,727 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:24:49,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:49,743 INFO L225 Difference]: With dead ends: 8496 [2021-07-13 20:24:49,743 INFO L226 Difference]: Without dead ends: 8471 [2021-07-13 20:24:49,744 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2011 ImplicationChecksByTransitivity, 3312.9ms TimeCoverageRelationStatistics Valid=835, Invalid=5171, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:24:49,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8471 states. [2021-07-13 20:24:49,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8471 to 5694. [2021-07-13 20:24:49,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5694 states, 5693 states have (on average 3.3990865975759705) internal successors, (19351), 5693 states have internal predecessors, (19351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:49,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5694 states to 5694 states and 19351 transitions. [2021-07-13 20:24:49,846 INFO L78 Accepts]: Start accepts. Automaton has 5694 states and 19351 transitions. Word has length 30 [2021-07-13 20:24:49,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:49,847 INFO L482 AbstractCegarLoop]: Abstraction has 5694 states and 19351 transitions. [2021-07-13 20:24:49,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:49,847 INFO L276 IsEmpty]: Start isEmpty. Operand 5694 states and 19351 transitions. [2021-07-13 20:24:49,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:24:49,854 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:49,854 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:24:50,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-13 20:24:50,056 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:50,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:50,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1633979309, now seen corresponding path program 30 times [2021-07-13 20:24:50,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:50,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906653495] [2021-07-13 20:24:50,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:50,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:50,153 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:50,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:50,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906653495] [2021-07-13 20:24:50,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906653495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:50,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257538334] [2021-07-13 20:24:50,154 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:50,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:24:50,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:24:50,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:24:50,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:50,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:50,396 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 19 treesize of output 27 [2021-07-13 20:24:50,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:24:50,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:50,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:24:50,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:38 [2021-07-13 20:24:50,538 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:50,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257538334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:50,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:50,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 21 [2021-07-13 20:24:50,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848070458] [2021-07-13 20:24:50,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:24:50,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:50,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:24:50,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:24:50,539 INFO L87 Difference]: Start difference. First operand 5694 states and 19351 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 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) [2021-07-13 20:24:51,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:51,318 INFO L93 Difference]: Finished difference Result 7140 states and 23704 transitions. [2021-07-13 20:24:51,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:24:51,322 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 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 30 [2021-07-13 20:24:51,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:51,336 INFO L225 Difference]: With dead ends: 7140 [2021-07-13 20:24:51,336 INFO L226 Difference]: Without dead ends: 7002 [2021-07-13 20:24:51,336 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 593.4ms TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:24:51,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7002 states. [2021-07-13 20:24:51,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7002 to 5718. [2021-07-13 20:24:51,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5718 states, 5717 states have (on average 3.3998600664684275) internal successors, (19437), 5717 states have internal predecessors, (19437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:51,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5718 states to 5718 states and 19437 transitions. [2021-07-13 20:24:51,428 INFO L78 Accepts]: Start accepts. Automaton has 5718 states and 19437 transitions. Word has length 30 [2021-07-13 20:24:51,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:51,428 INFO L482 AbstractCegarLoop]: Abstraction has 5718 states and 19437 transitions. [2021-07-13 20:24:51,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 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) [2021-07-13 20:24:51,428 INFO L276 IsEmpty]: Start isEmpty. Operand 5718 states and 19437 transitions. [2021-07-13 20:24:51,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:24:51,436 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:51,436 INFO L508 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] [2021-07-13 20:24:51,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-07-13 20:24:51,636 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:51,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:51,637 INFO L82 PathProgramCache]: Analyzing trace with hash -679268830, now seen corresponding path program 33 times [2021-07-13 20:24:51,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:51,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398036727] [2021-07-13 20:24:51,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:51,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:52,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:52,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:52,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398036727] [2021-07-13 20:24:52,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398036727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:52,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608523789] [2021-07-13 20:24:52,020 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:52,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:24:52,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:24:52,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:24:52,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:52,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:52,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:52,311 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 28 treesize of output 32 [2021-07-13 20:24:52,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:24:52,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:52,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:24:52,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:41 [2021-07-13 20:24:52,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:52,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608523789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:52,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:52,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-07-13 20:24:52,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544936524] [2021-07-13 20:24:52,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:24:52,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:52,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:24:52,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:24:52,496 INFO L87 Difference]: Start difference. First operand 5718 states and 19437 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:53,411 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-07-13 20:24:53,912 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-07-13 20:24:54,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:54,842 INFO L93 Difference]: Finished difference Result 8751 states and 28822 transitions. [2021-07-13 20:24:54,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:24:54,843 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:24:54,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:54,861 INFO L225 Difference]: With dead ends: 8751 [2021-07-13 20:24:54,861 INFO L226 Difference]: Without dead ends: 8725 [2021-07-13 20:24:54,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 2106.7ms TimeCoverageRelationStatistics Valid=379, Invalid=2483, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:24:54,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8725 states. [2021-07-13 20:24:54,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8725 to 5809. [2021-07-13 20:24:54,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5809 states, 5808 states have (on average 3.4013429752066116) internal successors, (19755), 5808 states have internal predecessors, (19755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:55,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5809 states to 5809 states and 19755 transitions. [2021-07-13 20:24:55,011 INFO L78 Accepts]: Start accepts. Automaton has 5809 states and 19755 transitions. Word has length 30 [2021-07-13 20:24:55,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:55,011 INFO L482 AbstractCegarLoop]: Abstraction has 5809 states and 19755 transitions. [2021-07-13 20:24:55,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:55,011 INFO L276 IsEmpty]: Start isEmpty. Operand 5809 states and 19755 transitions. [2021-07-13 20:24:55,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:24:55,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:55,020 INFO L508 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] [2021-07-13 20:24:55,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:55,221 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:55,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:55,221 INFO L82 PathProgramCache]: Analyzing trace with hash -190748142, now seen corresponding path program 34 times [2021-07-13 20:24:55,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:55,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687348503] [2021-07-13 20:24:55,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:55,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:55,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:55,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:55,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687348503] [2021-07-13 20:24:55,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687348503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:55,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811389820] [2021-07-13 20:24:55,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:55,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:24:55,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:24:55,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:24:55,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:55,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:55,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:24:55,687 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 19 treesize of output 11 [2021-07-13 20:24:55,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:24:55,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:55,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:24:55,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:24:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:55,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811389820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:55,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:55,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:24:55,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861495432] [2021-07-13 20:24:55,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:24:55,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:55,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:24:55,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:24:55,717 INFO L87 Difference]: Start difference. First operand 5809 states and 19755 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2021-07-13 20:24:58,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:24:58,052 INFO L93 Difference]: Finished difference Result 10525 states and 34115 transitions. [2021-07-13 20:24:58,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:24:58,052 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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 30 [2021-07-13 20:24:58,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:24:58,072 INFO L225 Difference]: With dead ends: 10525 [2021-07-13 20:24:58,072 INFO L226 Difference]: Without dead ends: 10504 [2021-07-13 20:24:58,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 1688.1ms TimeCoverageRelationStatistics Valid=552, Invalid=3870, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:24:58,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10504 states. [2021-07-13 20:24:58,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10504 to 5873. [2021-07-13 20:24:58,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5873 states, 5872 states have (on average 3.403440054495913) internal successors, (19985), 5872 states have internal predecessors, (19985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:24:58,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5873 states to 5873 states and 19985 transitions. [2021-07-13 20:24:58,206 INFO L78 Accepts]: Start accepts. Automaton has 5873 states and 19985 transitions. Word has length 30 [2021-07-13 20:24:58,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:24:58,206 INFO L482 AbstractCegarLoop]: Abstraction has 5873 states and 19985 transitions. [2021-07-13 20:24:58,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2021-07-13 20:24:58,206 INFO L276 IsEmpty]: Start isEmpty. Operand 5873 states and 19985 transitions. [2021-07-13 20:24:58,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:24:58,216 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:24:58,216 INFO L508 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] [2021-07-13 20:24:58,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:58,417 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:24:58,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:24:58,417 INFO L82 PathProgramCache]: Analyzing trace with hash -2047177872, now seen corresponding path program 35 times [2021-07-13 20:24:58,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:24:58,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282685412] [2021-07-13 20:24:58,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:24:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:24:58,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:58,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:24:58,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282685412] [2021-07-13 20:24:58,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282685412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:58,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021291969] [2021-07-13 20:24:58,609 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:24:58,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:24:58,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:24:58,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:24:58,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:24:58,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:24:58,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:24:58,888 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 19 treesize of output 11 [2021-07-13 20:24:58,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:24:58,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:24:58,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:24:58,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:24:58,916 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:24:58,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021291969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:24:58,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:24:58,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:24:58,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644086979] [2021-07-13 20:24:58,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:24:58,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:24:58,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:24:58,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:24:58,917 INFO L87 Difference]: Start difference. First operand 5873 states and 19985 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2021-07-13 20:25:00,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:00,442 INFO L93 Difference]: Finished difference Result 9687 states and 31917 transitions. [2021-07-13 20:25:00,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:25:00,442 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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 30 [2021-07-13 20:25:00,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:00,460 INFO L225 Difference]: With dead ends: 9687 [2021-07-13 20:25:00,460 INFO L226 Difference]: Without dead ends: 9666 [2021-07-13 20:25:00,461 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1197.9ms TimeCoverageRelationStatistics Valid=347, Invalid=2005, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:25:00,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9666 states. [2021-07-13 20:25:00,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9666 to 5903. [2021-07-13 20:25:00,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5903 states, 5902 states have (on average 3.4056252117926125) internal successors, (20100), 5902 states have internal predecessors, (20100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:00,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5903 states to 5903 states and 20100 transitions. [2021-07-13 20:25:00,585 INFO L78 Accepts]: Start accepts. Automaton has 5903 states and 20100 transitions. Word has length 30 [2021-07-13 20:25:00,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:00,586 INFO L482 AbstractCegarLoop]: Abstraction has 5903 states and 20100 transitions. [2021-07-13 20:25:00,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2021-07-13 20:25:00,586 INFO L276 IsEmpty]: Start isEmpty. Operand 5903 states and 20100 transitions. [2021-07-13 20:25:00,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:25:00,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:00,595 INFO L508 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] [2021-07-13 20:25:00,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:00,796 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:00,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:00,796 INFO L82 PathProgramCache]: Analyzing trace with hash -274070036, now seen corresponding path program 36 times [2021-07-13 20:25:00,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:00,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607630578] [2021-07-13 20:25:00,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:00,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:00,996 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:00,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:00,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607630578] [2021-07-13 20:25:00,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607630578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:00,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080422199] [2021-07-13 20:25:00,997 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:01,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:25:01,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:01,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:25:01,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:01,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:01,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:01,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:25:01,312 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:25:01,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:01,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:01,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-13 20:25:01,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:01,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080422199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:01,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:01,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:25:01,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112492006] [2021-07-13 20:25:01,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:25:01,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:01,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:25:01,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:25:01,379 INFO L87 Difference]: Start difference. First operand 5903 states and 20100 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2021-07-13 20:25:03,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:03,905 INFO L93 Difference]: Finished difference Result 10523 states and 34450 transitions. [2021-07-13 20:25:03,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:25:03,906 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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 30 [2021-07-13 20:25:03,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:03,927 INFO L225 Difference]: With dead ends: 10523 [2021-07-13 20:25:03,927 INFO L226 Difference]: Without dead ends: 10456 [2021-07-13 20:25:03,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 1912.7ms TimeCoverageRelationStatistics Valid=618, Invalid=3542, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:25:03,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10456 states. [2021-07-13 20:25:04,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10456 to 5965. [2021-07-13 20:25:04,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5965 states, 5964 states have (on average 3.416834339369551) internal successors, (20378), 5964 states have internal predecessors, (20378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:04,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5965 states to 5965 states and 20378 transitions. [2021-07-13 20:25:04,077 INFO L78 Accepts]: Start accepts. Automaton has 5965 states and 20378 transitions. Word has length 30 [2021-07-13 20:25:04,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:04,077 INFO L482 AbstractCegarLoop]: Abstraction has 5965 states and 20378 transitions. [2021-07-13 20:25:04,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2021-07-13 20:25:04,078 INFO L276 IsEmpty]: Start isEmpty. Operand 5965 states and 20378 transitions. [2021-07-13 20:25:04,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:25:04,087 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:04,087 INFO L508 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] [2021-07-13 20:25:04,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2021-07-13 20:25:04,288 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:04,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:04,288 INFO L82 PathProgramCache]: Analyzing trace with hash 87027730, now seen corresponding path program 37 times [2021-07-13 20:25:04,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:04,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343862047] [2021-07-13 20:25:04,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:04,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:04,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:04,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343862047] [2021-07-13 20:25:04,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343862047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:04,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924862534] [2021-07-13 20:25:04,532 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:04,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:04,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:25:04,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:04,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:04,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:04,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:04,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-07-13 20:25:04,734 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:25:04,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:04,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:04,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-07-13 20:25:04,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:04,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924862534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:04,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:04,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:25:04,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937158065] [2021-07-13 20:25:04,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:25:04,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:04,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:25:04,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:25:04,810 INFO L87 Difference]: Start difference. First operand 5965 states and 20378 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2021-07-13 20:25:06,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:06,097 INFO L93 Difference]: Finished difference Result 9182 states and 30455 transitions. [2021-07-13 20:25:06,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:25:06,097 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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 30 [2021-07-13 20:25:06,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:06,117 INFO L225 Difference]: With dead ends: 9182 [2021-07-13 20:25:06,117 INFO L226 Difference]: Without dead ends: 9105 [2021-07-13 20:25:06,117 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1098.9ms TimeCoverageRelationStatistics Valid=307, Invalid=1673, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:25:06,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9105 states. [2021-07-13 20:25:06,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9105 to 5990. [2021-07-13 20:25:06,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5990 states, 5989 states have (on average 3.418600768074804) internal successors, (20474), 5989 states have internal predecessors, (20474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:06,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5990 states to 5990 states and 20474 transitions. [2021-07-13 20:25:06,239 INFO L78 Accepts]: Start accepts. Automaton has 5990 states and 20474 transitions. Word has length 30 [2021-07-13 20:25:06,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:06,239 INFO L482 AbstractCegarLoop]: Abstraction has 5990 states and 20474 transitions. [2021-07-13 20:25:06,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2021-07-13 20:25:06,240 INFO L276 IsEmpty]: Start isEmpty. Operand 5990 states and 20474 transitions. [2021-07-13 20:25:06,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:25:06,248 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:06,248 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:06,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-07-13 20:25:06,448 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:06,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:06,449 INFO L82 PathProgramCache]: Analyzing trace with hash -2029342979, now seen corresponding path program 31 times [2021-07-13 20:25:06,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:06,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169431207] [2021-07-13 20:25:06,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:06,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:06,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169431207] [2021-07-13 20:25:06,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169431207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:06,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241166381] [2021-07-13 20:25:06,559 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:06,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:06,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:25:06,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:06,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 20:25:06,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:06,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:06,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:06,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-13 20:25:06,718 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:06,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241166381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:06,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:06,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:25:06,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726001449] [2021-07-13 20:25:06,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:25:06,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:06,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:25:06,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:25:06,719 INFO L87 Difference]: Start difference. First operand 5990 states and 20474 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:06,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:06,929 INFO L93 Difference]: Finished difference Result 6518 states and 22032 transitions. [2021-07-13 20:25:06,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:25:06,929 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:25:06,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:06,944 INFO L225 Difference]: With dead ends: 6518 [2021-07-13 20:25:06,944 INFO L226 Difference]: Without dead ends: 6449 [2021-07-13 20:25:06,944 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 199.4ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:25:06,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6449 states. [2021-07-13 20:25:07,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6449 to 6000. [2021-07-13 20:25:07,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6000 states, 5999 states have (on average 3.4140690115019168) internal successors, (20481), 5999 states have internal predecessors, (20481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:07,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6000 states to 6000 states and 20481 transitions. [2021-07-13 20:25:07,101 INFO L78 Accepts]: Start accepts. Automaton has 6000 states and 20481 transitions. Word has length 30 [2021-07-13 20:25:07,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:07,101 INFO L482 AbstractCegarLoop]: Abstraction has 6000 states and 20481 transitions. [2021-07-13 20:25:07,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:07,101 INFO L276 IsEmpty]: Start isEmpty. Operand 6000 states and 20481 transitions. [2021-07-13 20:25:07,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:25:07,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:07,110 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:07,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-07-13 20:25:07,310 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:07,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:07,311 INFO L82 PathProgramCache]: Analyzing trace with hash -824418271, now seen corresponding path program 32 times [2021-07-13 20:25:07,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:07,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628395736] [2021-07-13 20:25:07,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:07,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:07,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:07,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628395736] [2021-07-13 20:25:07,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628395736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:07,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668244076] [2021-07-13 20:25:07,424 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:07,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:25:07,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:07,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:25:07,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:07,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:07,632 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:07,632 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 29 treesize of output 35 [2021-07-13 20:25:07,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:25:07,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:07,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:07,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:46 [2021-07-13 20:25:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:07,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668244076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:07,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:07,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 21 [2021-07-13 20:25:07,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611756461] [2021-07-13 20:25:07,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:25:07,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:07,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:25:07,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:25:07,806 INFO L87 Difference]: Start difference. First operand 6000 states and 20481 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 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) [2021-07-13 20:25:08,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:08,685 INFO L93 Difference]: Finished difference Result 6705 states and 22557 transitions. [2021-07-13 20:25:08,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:25:08,685 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 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 30 [2021-07-13 20:25:08,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:08,700 INFO L225 Difference]: With dead ends: 6705 [2021-07-13 20:25:08,700 INFO L226 Difference]: Without dead ends: 6643 [2021-07-13 20:25:08,700 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 756.9ms TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:25:08,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6643 states. [2021-07-13 20:25:08,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6643 to 6010. [2021-07-13 20:25:08,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6010 states, 6009 states have (on average 3.412880678981528) internal successors, (20508), 6009 states have internal predecessors, (20508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:08,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6010 states to 6010 states and 20508 transitions. [2021-07-13 20:25:08,806 INFO L78 Accepts]: Start accepts. Automaton has 6010 states and 20508 transitions. Word has length 30 [2021-07-13 20:25:08,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:08,806 INFO L482 AbstractCegarLoop]: Abstraction has 6010 states and 20508 transitions. [2021-07-13 20:25:08,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 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) [2021-07-13 20:25:08,806 INFO L276 IsEmpty]: Start isEmpty. Operand 6010 states and 20508 transitions. [2021-07-13 20:25:08,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:25:08,815 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:08,815 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:09,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:09,017 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:09,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:09,017 INFO L82 PathProgramCache]: Analyzing trace with hash -767713039, now seen corresponding path program 33 times [2021-07-13 20:25:09,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:09,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896404320] [2021-07-13 20:25:09,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:09,188 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:09,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:09,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896404320] [2021-07-13 20:25:09,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896404320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:09,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283466749] [2021-07-13 20:25:09,188 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:09,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:25:09,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:09,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:25:09,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:09,453 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:09,453 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 19 treesize of output 27 [2021-07-13 20:25:09,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:25:09,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:09,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:09,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:139 [2021-07-13 20:25:09,772 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:09,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283466749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:09,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:09,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17] total 24 [2021-07-13 20:25:09,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948226592] [2021-07-13 20:25:09,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:25:09,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:09,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:25:09,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:25:09,773 INFO L87 Difference]: Start difference. First operand 6010 states and 20508 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:11,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:11,184 INFO L93 Difference]: Finished difference Result 6764 states and 22726 transitions. [2021-07-13 20:25:11,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:25:11,184 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:25:11,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:11,199 INFO L225 Difference]: With dead ends: 6764 [2021-07-13 20:25:11,199 INFO L226 Difference]: Without dead ends: 6734 [2021-07-13 20:25:11,199 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1182.8ms TimeCoverageRelationStatistics Valid=244, Invalid=1562, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:25:11,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6734 states. [2021-07-13 20:25:11,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6734 to 6038. [2021-07-13 20:25:11,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6038 states, 6037 states have (on average 3.4132847440781844) internal successors, (20606), 6037 states have internal predecessors, (20606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:11,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6038 states to 6038 states and 20606 transitions. [2021-07-13 20:25:11,336 INFO L78 Accepts]: Start accepts. Automaton has 6038 states and 20606 transitions. Word has length 30 [2021-07-13 20:25:11,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:11,336 INFO L482 AbstractCegarLoop]: Abstraction has 6038 states and 20606 transitions. [2021-07-13 20:25:11,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:11,336 INFO L276 IsEmpty]: Start isEmpty. Operand 6038 states and 20606 transitions. [2021-07-13 20:25:11,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:25:11,346 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:11,346 INFO L508 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] [2021-07-13 20:25:11,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-07-13 20:25:11,546 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:11,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:11,547 INFO L82 PathProgramCache]: Analyzing trace with hash 864921772, now seen corresponding path program 38 times [2021-07-13 20:25:11,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:11,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139330934] [2021-07-13 20:25:11,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:11,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:11,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:11,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:11,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139330934] [2021-07-13 20:25:11,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139330934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:11,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401432376] [2021-07-13 20:25:11,918 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:11,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:25:11,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:11,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:25:11,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:12,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:12,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:12,155 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 28 treesize of output 32 [2021-07-13 20:25:12,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:12,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:12,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:12,175 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:41 [2021-07-13 20:25:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:12,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401432376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:12,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:12,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-07-13 20:25:12,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302778537] [2021-07-13 20:25:12,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:25:12,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:12,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:25:12,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:25:12,291 INFO L87 Difference]: Start difference. First operand 6038 states and 20606 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:13,239 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2021-07-13 20:25:14,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:14,167 INFO L93 Difference]: Finished difference Result 7697 states and 25628 transitions. [2021-07-13 20:25:14,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:25:14,167 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:25:14,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:14,183 INFO L225 Difference]: With dead ends: 7697 [2021-07-13 20:25:14,183 INFO L226 Difference]: Without dead ends: 7671 [2021-07-13 20:25:14,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1656.3ms TimeCoverageRelationStatistics Valid=327, Invalid=2025, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:25:14,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7671 states. [2021-07-13 20:25:14,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7671 to 6056. [2021-07-13 20:25:14,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6056 states, 6055 states have (on average 3.4123864574731626) internal successors, (20662), 6055 states have internal predecessors, (20662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:14,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6056 states to 6056 states and 20662 transitions. [2021-07-13 20:25:14,289 INFO L78 Accepts]: Start accepts. Automaton has 6056 states and 20662 transitions. Word has length 30 [2021-07-13 20:25:14,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:14,289 INFO L482 AbstractCegarLoop]: Abstraction has 6056 states and 20662 transitions. [2021-07-13 20:25:14,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:14,289 INFO L276 IsEmpty]: Start isEmpty. Operand 6056 states and 20662 transitions. [2021-07-13 20:25:14,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:25:14,298 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:14,298 INFO L508 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] [2021-07-13 20:25:14,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-07-13 20:25:14,501 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:14,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:14,501 INFO L82 PathProgramCache]: Analyzing trace with hash -109421332, now seen corresponding path program 39 times [2021-07-13 20:25:14,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:14,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614731157] [2021-07-13 20:25:14,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:14,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:14,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:14,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614731157] [2021-07-13 20:25:14,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614731157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:14,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401341801] [2021-07-13 20:25:14,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:14,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:25:14,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:14,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:25:14,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:15,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:15,126 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 19 treesize of output 35 [2021-07-13 20:25:15,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:25:15,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:15,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:15,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:158 [2021-07-13 20:25:15,407 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-07-13 20:25:15,677 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-07-13 20:25:15,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:15,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401341801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:15,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:15,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 20:25:15,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220854033] [2021-07-13 20:25:15,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:25:15,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:15,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:25:15,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:25:15,847 INFO L87 Difference]: Start difference. First operand 6056 states and 20662 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:17,148 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-07-13 20:25:17,468 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-07-13 20:25:18,765 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 44 [2021-07-13 20:25:18,981 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-07-13 20:25:19,339 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 40 [2021-07-13 20:25:20,009 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2021-07-13 20:25:20,205 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-07-13 20:25:20,488 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-07-13 20:25:20,776 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2021-07-13 20:25:20,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:20,978 INFO L93 Difference]: Finished difference Result 8480 states and 28186 transitions. [2021-07-13 20:25:20,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:25:20,978 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:25:20,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:20,996 INFO L225 Difference]: With dead ends: 8480 [2021-07-13 20:25:20,996 INFO L226 Difference]: Without dead ends: 8427 [2021-07-13 20:25:20,996 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 4852.1ms TimeCoverageRelationStatistics Valid=629, Invalid=4483, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:25:21,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8427 states. [2021-07-13 20:25:21,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8427 to 6099. [2021-07-13 20:25:21,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6099 states, 6098 states have (on average 3.4137422105608395) internal successors, (20817), 6098 states have internal predecessors, (20817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:21,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6099 states to 6099 states and 20817 transitions. [2021-07-13 20:25:21,125 INFO L78 Accepts]: Start accepts. Automaton has 6099 states and 20817 transitions. Word has length 30 [2021-07-13 20:25:21,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:21,125 INFO L482 AbstractCegarLoop]: Abstraction has 6099 states and 20817 transitions. [2021-07-13 20:25:21,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:21,125 INFO L276 IsEmpty]: Start isEmpty. Operand 6099 states and 20817 transitions. [2021-07-13 20:25:21,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:25:21,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:21,136 INFO L508 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] [2021-07-13 20:25:21,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:21,336 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:21,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:21,336 INFO L82 PathProgramCache]: Analyzing trace with hash -2040035028, now seen corresponding path program 40 times [2021-07-13 20:25:21,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:21,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801439826] [2021-07-13 20:25:21,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:21,707 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:21,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:21,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801439826] [2021-07-13 20:25:21,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801439826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:21,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94913772] [2021-07-13 20:25:21,708 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:21,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:25:21,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:21,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:25:21,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:21,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:21,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:25:21,943 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 19 treesize of output 11 [2021-07-13 20:25:21,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:21,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:21,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:21,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:25:21,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:21,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94913772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:21,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:21,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:25:21,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018090160] [2021-07-13 20:25:21,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:25:21,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:21,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:25:21,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:25:21,974 INFO L87 Difference]: Start difference. First operand 6099 states and 20817 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:23,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:23,760 INFO L93 Difference]: Finished difference Result 7457 states and 24976 transitions. [2021-07-13 20:25:23,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:25:23,760 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:25:23,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:23,776 INFO L225 Difference]: With dead ends: 7457 [2021-07-13 20:25:23,776 INFO L226 Difference]: Without dead ends: 7438 [2021-07-13 20:25:23,776 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1604.8ms TimeCoverageRelationStatistics Valid=333, Invalid=2217, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:25:23,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7438 states. [2021-07-13 20:25:23,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7438 to 6101. [2021-07-13 20:25:23,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6101 states, 6100 states have (on average 3.4137704918032785) internal successors, (20824), 6100 states have internal predecessors, (20824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:23,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6101 states to 6101 states and 20824 transitions. [2021-07-13 20:25:23,892 INFO L78 Accepts]: Start accepts. Automaton has 6101 states and 20824 transitions. Word has length 30 [2021-07-13 20:25:23,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:23,893 INFO L482 AbstractCegarLoop]: Abstraction has 6101 states and 20824 transitions. [2021-07-13 20:25:23,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:23,893 INFO L276 IsEmpty]: Start isEmpty. Operand 6101 states and 20824 transitions. [2021-07-13 20:25:23,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:25:23,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:23,902 INFO L508 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] [2021-07-13 20:25:24,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:24,103 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:24,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:24,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1418323052, now seen corresponding path program 41 times [2021-07-13 20:25:24,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:24,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659246200] [2021-07-13 20:25:24,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:24,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:24,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:24,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659246200] [2021-07-13 20:25:24,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659246200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:24,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424423383] [2021-07-13 20:25:24,312 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:24,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:25:24,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:24,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:25:24,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:24,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:24,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:25:24,663 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 19 treesize of output 11 [2021-07-13 20:25:24,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:24,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:24,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:24,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:25:24,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:24,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424423383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:24,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:24,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:25:24,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645779895] [2021-07-13 20:25:24,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:25:24,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:24,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:25:24,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:25:24,686 INFO L87 Difference]: Start difference. First operand 6101 states and 20824 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2021-07-13 20:25:26,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:26,267 INFO L93 Difference]: Finished difference Result 9244 states and 30770 transitions. [2021-07-13 20:25:26,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:25:26,268 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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 30 [2021-07-13 20:25:26,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:26,290 INFO L225 Difference]: With dead ends: 9244 [2021-07-13 20:25:26,291 INFO L226 Difference]: Without dead ends: 9223 [2021-07-13 20:25:26,291 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1244.9ms TimeCoverageRelationStatistics Valid=330, Invalid=1926, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:25:26,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9223 states. [2021-07-13 20:25:26,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9223 to 6163. [2021-07-13 20:25:26,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6163 states, 6162 states have (on average 3.4138266796494645) internal successors, (21036), 6162 states have internal predecessors, (21036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:26,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6163 states to 6163 states and 21036 transitions. [2021-07-13 20:25:26,432 INFO L78 Accepts]: Start accepts. Automaton has 6163 states and 21036 transitions. Word has length 30 [2021-07-13 20:25:26,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:26,432 INFO L482 AbstractCegarLoop]: Abstraction has 6163 states and 21036 transitions. [2021-07-13 20:25:26,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2021-07-13 20:25:26,432 INFO L276 IsEmpty]: Start isEmpty. Operand 6163 states and 21036 transitions. [2021-07-13 20:25:26,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:25:26,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:26,441 INFO L508 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] [2021-07-13 20:25:26,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-07-13 20:25:26,642 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:26,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:26,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1342440280, now seen corresponding path program 42 times [2021-07-13 20:25:26,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:26,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526732130] [2021-07-13 20:25:26,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:27,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:27,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:27,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526732130] [2021-07-13 20:25:27,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526732130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:27,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580172205] [2021-07-13 20:25:27,057 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:27,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:25:27,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:27,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:25:27,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:27,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:27,304 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:27,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:25:27,306 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:25:27,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:27,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:27,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-13 20:25:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:27,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580172205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:27,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:27,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-07-13 20:25:27,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060598545] [2021-07-13 20:25:27,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:25:27,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:27,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:25:27,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:25:27,362 INFO L87 Difference]: Start difference. First operand 6163 states and 21036 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:29,762 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-07-13 20:25:31,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:31,338 INFO L93 Difference]: Finished difference Result 9714 states and 31902 transitions. [2021-07-13 20:25:31,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-13 20:25:31,338 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:25:31,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:31,359 INFO L225 Difference]: With dead ends: 9714 [2021-07-13 20:25:31,359 INFO L226 Difference]: Without dead ends: 9659 [2021-07-13 20:25:31,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2268 ImplicationChecksByTransitivity, 3192.4ms TimeCoverageRelationStatistics Valid=815, Invalid=6157, Unknown=0, NotChecked=0, Total=6972 [2021-07-13 20:25:31,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9659 states. [2021-07-13 20:25:31,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9659 to 6173. [2021-07-13 20:25:31,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6173 states, 6172 states have (on average 3.4149384316267013) internal successors, (21077), 6172 states have internal predecessors, (21077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:31,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6173 states to 6173 states and 21077 transitions. [2021-07-13 20:25:31,504 INFO L78 Accepts]: Start accepts. Automaton has 6173 states and 21077 transitions. Word has length 30 [2021-07-13 20:25:31,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:31,505 INFO L482 AbstractCegarLoop]: Abstraction has 6173 states and 21077 transitions. [2021-07-13 20:25:31,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:31,505 INFO L276 IsEmpty]: Start isEmpty. Operand 6173 states and 21077 transitions. [2021-07-13 20:25:31,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:25:31,517 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:31,517 INFO L508 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] [2021-07-13 20:25:31,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:31,741 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:31,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:31,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1284214256, now seen corresponding path program 43 times [2021-07-13 20:25:31,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:31,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123052493] [2021-07-13 20:25:31,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:31,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:32,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:32,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:32,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123052493] [2021-07-13 20:25:32,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123052493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:32,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625147147] [2021-07-13 20:25:32,020 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:32,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:25:32,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:32,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:32,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:32,248 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:32,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-07-13 20:25:32,250 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:25:32,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:32,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:32,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-07-13 20:25:32,325 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:32,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625147147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:32,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:32,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:25:32,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185265873] [2021-07-13 20:25:32,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:25:32,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:32,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:25:32,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:25:32,327 INFO L87 Difference]: Start difference. First operand 6173 states and 21077 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2021-07-13 20:25:33,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:33,657 INFO L93 Difference]: Finished difference Result 9307 states and 30934 transitions. [2021-07-13 20:25:33,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:25:33,657 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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 30 [2021-07-13 20:25:33,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:33,677 INFO L225 Difference]: With dead ends: 9307 [2021-07-13 20:25:33,677 INFO L226 Difference]: Without dead ends: 9230 [2021-07-13 20:25:33,677 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1078.6ms TimeCoverageRelationStatistics Valid=318, Invalid=1574, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:25:33,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9230 states. [2021-07-13 20:25:33,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9230 to 6160. [2021-07-13 20:25:33,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6160 states, 6159 states have (on average 3.4159766195811008) internal successors, (21039), 6159 states have internal predecessors, (21039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:33,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6160 states to 6160 states and 21039 transitions. [2021-07-13 20:25:33,807 INFO L78 Accepts]: Start accepts. Automaton has 6160 states and 21039 transitions. Word has length 30 [2021-07-13 20:25:33,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:33,808 INFO L482 AbstractCegarLoop]: Abstraction has 6160 states and 21039 transitions. [2021-07-13 20:25:33,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2021-07-13 20:25:33,808 INFO L276 IsEmpty]: Start isEmpty. Operand 6160 states and 21039 transitions. [2021-07-13 20:25:33,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:25:33,817 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:33,817 INFO L508 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] [2021-07-13 20:25:34,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-07-13 20:25:34,019 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:34,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:34,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1930370840, now seen corresponding path program 44 times [2021-07-13 20:25:34,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:34,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290309205] [2021-07-13 20:25:34,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:34,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:34,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:34,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290309205] [2021-07-13 20:25:34,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290309205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:34,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75738138] [2021-07-13 20:25:34,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:34,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:25:34,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:34,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:25:34,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:34,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:34,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:34,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:34,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:25:34,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:34,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2021-07-13 20:25:34,577 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:25:34,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:34,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:34,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:28 [2021-07-13 20:25:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:34,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75738138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:34,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:34,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 20:25:34,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521875582] [2021-07-13 20:25:34,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:25:34,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:34,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:25:34,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:25:34,662 INFO L87 Difference]: Start difference. First operand 6160 states and 21039 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2021-07-13 20:25:38,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:38,608 INFO L93 Difference]: Finished difference Result 10757 states and 35501 transitions. [2021-07-13 20:25:38,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-13 20:25:38,609 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 30 [2021-07-13 20:25:38,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:38,632 INFO L225 Difference]: With dead ends: 10757 [2021-07-13 20:25:38,632 INFO L226 Difference]: Without dead ends: 10710 [2021-07-13 20:25:38,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1979 ImplicationChecksByTransitivity, 2845.3ms TimeCoverageRelationStatistics Valid=765, Invalid=5397, Unknown=0, NotChecked=0, Total=6162 [2021-07-13 20:25:38,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10710 states. [2021-07-13 20:25:38,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10710 to 6165. [2021-07-13 20:25:38,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6165 states, 6164 states have (on average 3.416288124594419) internal successors, (21058), 6164 states have internal predecessors, (21058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:38,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6165 states to 6165 states and 21058 transitions. [2021-07-13 20:25:38,777 INFO L78 Accepts]: Start accepts. Automaton has 6165 states and 21058 transitions. Word has length 30 [2021-07-13 20:25:38,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:38,777 INFO L482 AbstractCegarLoop]: Abstraction has 6165 states and 21058 transitions. [2021-07-13 20:25:38,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2021-07-13 20:25:38,777 INFO L276 IsEmpty]: Start isEmpty. Operand 6165 states and 21058 transitions. [2021-07-13 20:25:38,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:25:38,786 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:38,786 INFO L508 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] [2021-07-13 20:25:38,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:38,987 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:38,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:38,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1586753244, now seen corresponding path program 45 times [2021-07-13 20:25:38,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:38,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411265214] [2021-07-13 20:25:38,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:39,314 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:39,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:39,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411265214] [2021-07-13 20:25:39,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411265214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:39,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095164389] [2021-07-13 20:25:39,315 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:39,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:25:39,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:39,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:25:39,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:39,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:39,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:39,558 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 19 treesize of output 27 [2021-07-13 20:25:39,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:25:39,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:39,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:39,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:67 [2021-07-13 20:25:39,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:39,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095164389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:39,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:39,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:25:39,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511191104] [2021-07-13 20:25:39,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:25:39,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:39,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:25:39,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:25:39,806 INFO L87 Difference]: Start difference. First operand 6165 states and 21058 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:44,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:44,325 INFO L93 Difference]: Finished difference Result 8909 states and 29416 transitions. [2021-07-13 20:25:44,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-13 20:25:44,325 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:25:44,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:44,344 INFO L225 Difference]: With dead ends: 8909 [2021-07-13 20:25:44,344 INFO L226 Difference]: Without dead ends: 8853 [2021-07-13 20:25:44,344 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1840 ImplicationChecksByTransitivity, 3555.8ms TimeCoverageRelationStatistics Valid=579, Invalid=5583, Unknown=0, NotChecked=0, Total=6162 [2021-07-13 20:25:44,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8853 states. [2021-07-13 20:25:44,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8853 to 6186. [2021-07-13 20:25:44,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6186 states, 6185 states have (on average 3.4202101859337106) internal successors, (21154), 6185 states have internal predecessors, (21154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:44,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6186 states to 6186 states and 21154 transitions. [2021-07-13 20:25:44,482 INFO L78 Accepts]: Start accepts. Automaton has 6186 states and 21154 transitions. Word has length 30 [2021-07-13 20:25:44,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:44,482 INFO L482 AbstractCegarLoop]: Abstraction has 6186 states and 21154 transitions. [2021-07-13 20:25:44,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:44,482 INFO L276 IsEmpty]: Start isEmpty. Operand 6186 states and 21154 transitions. [2021-07-13 20:25:44,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:25:44,492 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:44,492 INFO L508 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] [2021-07-13 20:25:44,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-07-13 20:25:44,692 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:44,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:44,693 INFO L82 PathProgramCache]: Analyzing trace with hash -181911884, now seen corresponding path program 46 times [2021-07-13 20:25:44,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:44,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355755110] [2021-07-13 20:25:44,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:45,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:45,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355755110] [2021-07-13 20:25:45,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355755110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:45,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495363995] [2021-07-13 20:25:45,031 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:45,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:25:45,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:45,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:25:45,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:45,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:45,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:25:45,318 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 19 treesize of output 11 [2021-07-13 20:25:45,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:45,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:45,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:45,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:25:45,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:45,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495363995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:45,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:45,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:25:45,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048022946] [2021-07-13 20:25:45,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:25:45,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:45,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:25:45,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:25:45,348 INFO L87 Difference]: Start difference. First operand 6186 states and 21154 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:46,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:46,122 INFO L93 Difference]: Finished difference Result 7716 states and 26020 transitions. [2021-07-13 20:25:46,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:25:46,122 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:25:46,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:46,138 INFO L225 Difference]: With dead ends: 7716 [2021-07-13 20:25:46,139 INFO L226 Difference]: Without dead ends: 7695 [2021-07-13 20:25:46,139 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 741.1ms TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:25:46,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7695 states. [2021-07-13 20:25:46,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7695 to 6196. [2021-07-13 20:25:46,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6196 states, 6195 states have (on average 3.419693301049233) internal successors, (21185), 6195 states have internal predecessors, (21185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:46,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6196 states to 6196 states and 21185 transitions. [2021-07-13 20:25:46,245 INFO L78 Accepts]: Start accepts. Automaton has 6196 states and 21185 transitions. Word has length 30 [2021-07-13 20:25:46,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:46,245 INFO L482 AbstractCegarLoop]: Abstraction has 6196 states and 21185 transitions. [2021-07-13 20:25:46,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:46,246 INFO L276 IsEmpty]: Start isEmpty. Operand 6196 states and 21185 transitions. [2021-07-13 20:25:46,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:25:46,254 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:46,254 INFO L508 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] [2021-07-13 20:25:46,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-07-13 20:25:46,456 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:46,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:46,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1591195952, now seen corresponding path program 47 times [2021-07-13 20:25:46,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:46,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632552849] [2021-07-13 20:25:46,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:46,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:46,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:46,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632552849] [2021-07-13 20:25:46,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632552849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:46,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191927131] [2021-07-13 20:25:46,739 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:46,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:25:46,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:46,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:25:46,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:46,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:46,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:46,947 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 28 treesize of output 32 [2021-07-13 20:25:46,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 20:25:46,996 INFO L628 ElimStorePlain]: treesize reduction 24, result has 66.2 percent of original size [2021-07-13 20:25:47,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:25:47,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:66 [2021-07-13 20:25:47,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:47,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191927131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:47,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:47,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-13 20:25:47,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726872304] [2021-07-13 20:25:47,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:25:47,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:47,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:25:47,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:25:47,134 INFO L87 Difference]: Start difference. First operand 6196 states and 21185 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:48,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:48,138 INFO L93 Difference]: Finished difference Result 8660 states and 28972 transitions. [2021-07-13 20:25:48,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:25:48,139 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:25:48,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:48,157 INFO L225 Difference]: With dead ends: 8660 [2021-07-13 20:25:48,158 INFO L226 Difference]: Without dead ends: 8610 [2021-07-13 20:25:48,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 870.0ms TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:25:48,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8610 states. [2021-07-13 20:25:48,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8610 to 6247. [2021-07-13 20:25:48,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6247 states, 6246 states have (on average 3.420268972142171) internal successors, (21363), 6246 states have internal predecessors, (21363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:48,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6247 states to 6247 states and 21363 transitions. [2021-07-13 20:25:48,287 INFO L78 Accepts]: Start accepts. Automaton has 6247 states and 21363 transitions. Word has length 30 [2021-07-13 20:25:48,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:48,287 INFO L482 AbstractCegarLoop]: Abstraction has 6247 states and 21363 transitions. [2021-07-13 20:25:48,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:48,288 INFO L276 IsEmpty]: Start isEmpty. Operand 6247 states and 21363 transitions. [2021-07-13 20:25:48,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:25:48,296 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:48,296 INFO L508 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] [2021-07-13 20:25:48,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-07-13 20:25:48,497 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:48,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:48,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1439678622, now seen corresponding path program 48 times [2021-07-13 20:25:48,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:48,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586770877] [2021-07-13 20:25:48,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:48,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:48,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:48,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:48,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586770877] [2021-07-13 20:25:48,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586770877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:48,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224124335] [2021-07-13 20:25:48,814 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:48,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:25:48,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:48,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:25:48,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:48,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:48,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:48,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:25:48,992 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:25:48,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:49,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:49,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-07-13 20:25:49,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:49,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224124335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:49,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:49,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 20:25:49,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502257640] [2021-07-13 20:25:49,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:25:49,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:49,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:25:49,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:25:49,074 INFO L87 Difference]: Start difference. First operand 6247 states and 21363 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:49,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:49,712 INFO L93 Difference]: Finished difference Result 7945 states and 26808 transitions. [2021-07-13 20:25:49,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:25:49,713 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:25:49,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:49,730 INFO L225 Difference]: With dead ends: 7945 [2021-07-13 20:25:49,730 INFO L226 Difference]: Without dead ends: 7920 [2021-07-13 20:25:49,730 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 653.3ms TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:25:49,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7920 states. [2021-07-13 20:25:49,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7920 to 6228. [2021-07-13 20:25:49,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6228 states, 6227 states have (on average 3.421069535892083) internal successors, (21303), 6227 states have internal predecessors, (21303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:49,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6228 states to 6228 states and 21303 transitions. [2021-07-13 20:25:49,832 INFO L78 Accepts]: Start accepts. Automaton has 6228 states and 21303 transitions. Word has length 30 [2021-07-13 20:25:49,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:49,833 INFO L482 AbstractCegarLoop]: Abstraction has 6228 states and 21303 transitions. [2021-07-13 20:25:49,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:49,833 INFO L276 IsEmpty]: Start isEmpty. Operand 6228 states and 21303 transitions. [2021-07-13 20:25:49,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:25:49,841 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:49,841 INFO L508 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] [2021-07-13 20:25:50,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:50,042 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:50,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:50,042 INFO L82 PathProgramCache]: Analyzing trace with hash 603346348, now seen corresponding path program 49 times [2021-07-13 20:25:50,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:50,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734828082] [2021-07-13 20:25:50,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:50,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:50,398 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:50,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:50,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734828082] [2021-07-13 20:25:50,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734828082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:50,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091146801] [2021-07-13 20:25:50,398 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:50,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:25:50,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:50,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:50,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:50,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:25:50,611 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:25:50,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:50,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:50,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-07-13 20:25:50,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:50,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091146801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:50,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:50,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 20:25:50,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880875207] [2021-07-13 20:25:50,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:25:50,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:50,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:25:50,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:25:50,701 INFO L87 Difference]: Start difference. First operand 6228 states and 21303 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:51,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:51,669 INFO L93 Difference]: Finished difference Result 8032 states and 27059 transitions. [2021-07-13 20:25:51,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:25:51,669 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:25:51,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:51,689 INFO L225 Difference]: With dead ends: 8032 [2021-07-13 20:25:51,689 INFO L226 Difference]: Without dead ends: 8007 [2021-07-13 20:25:51,690 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 736.1ms TimeCoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:25:51,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8007 states. [2021-07-13 20:25:51,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8007 to 6224. [2021-07-13 20:25:51,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6224 states, 6223 states have (on average 3.421018801221276) internal successors, (21289), 6223 states have internal predecessors, (21289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:51,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6224 states to 6224 states and 21289 transitions. [2021-07-13 20:25:51,825 INFO L78 Accepts]: Start accepts. Automaton has 6224 states and 21289 transitions. Word has length 30 [2021-07-13 20:25:51,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:51,825 INFO L482 AbstractCegarLoop]: Abstraction has 6224 states and 21289 transitions. [2021-07-13 20:25:51,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:51,825 INFO L276 IsEmpty]: Start isEmpty. Operand 6224 states and 21289 transitions. [2021-07-13 20:25:51,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:25:51,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:51,835 INFO L508 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] [2021-07-13 20:25:52,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-07-13 20:25:52,036 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:52,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:52,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1594721900, now seen corresponding path program 50 times [2021-07-13 20:25:52,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:52,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929276635] [2021-07-13 20:25:52,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:52,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:52,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:52,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:52,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929276635] [2021-07-13 20:25:52,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929276635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:52,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514003437] [2021-07-13 20:25:52,356 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:52,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:25:52,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:52,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:25:52,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:52,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:52,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:52,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:25:52,558 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:25:52,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:52,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:52,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-13 20:25:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:52,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514003437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:52,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:52,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:25:52,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849863027] [2021-07-13 20:25:52,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:25:52,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:52,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:25:52,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:25:52,638 INFO L87 Difference]: Start difference. First operand 6224 states and 21289 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:54,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:54,609 INFO L93 Difference]: Finished difference Result 8292 states and 27808 transitions. [2021-07-13 20:25:54,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:25:54,609 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:25:54,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:54,625 INFO L225 Difference]: With dead ends: 8292 [2021-07-13 20:25:54,625 INFO L226 Difference]: Without dead ends: 8267 [2021-07-13 20:25:54,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1569.5ms TimeCoverageRelationStatistics Valid=393, Invalid=2687, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:25:54,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8267 states. [2021-07-13 20:25:54,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8267 to 6232. [2021-07-13 20:25:54,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6232 states, 6231 states have (on average 3.4204782538918312) internal successors, (21313), 6231 states have internal predecessors, (21313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:54,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6232 states to 6232 states and 21313 transitions. [2021-07-13 20:25:54,783 INFO L78 Accepts]: Start accepts. Automaton has 6232 states and 21313 transitions. Word has length 30 [2021-07-13 20:25:54,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:54,783 INFO L482 AbstractCegarLoop]: Abstraction has 6232 states and 21313 transitions. [2021-07-13 20:25:54,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:54,783 INFO L276 IsEmpty]: Start isEmpty. Operand 6232 states and 21313 transitions. [2021-07-13 20:25:54,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:25:54,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:54,792 INFO L508 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] [2021-07-13 20:25:54,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:54,992 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:54,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:54,993 INFO L82 PathProgramCache]: Analyzing trace with hash -55546536, now seen corresponding path program 51 times [2021-07-13 20:25:54,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:54,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357453978] [2021-07-13 20:25:54,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:54,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:55,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:55,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:55,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357453978] [2021-07-13 20:25:55,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357453978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:55,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942337021] [2021-07-13 20:25:55,280 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:55,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:25:55,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:55,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:25:55,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:55,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:55,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:55,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:25:55,442 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:25:55,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:55,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:55,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-13 20:25:55,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:55,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942337021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:55,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:55,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:25:55,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570320126] [2021-07-13 20:25:55,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:25:55,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:55,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:25:55,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:25:55,517 INFO L87 Difference]: Start difference. First operand 6232 states and 21313 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:57,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:57,636 INFO L93 Difference]: Finished difference Result 8261 states and 27817 transitions. [2021-07-13 20:25:57,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:25:57,636 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:25:57,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:57,653 INFO L225 Difference]: With dead ends: 8261 [2021-07-13 20:25:57,654 INFO L226 Difference]: Without dead ends: 8230 [2021-07-13 20:25:57,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 1662.6ms TimeCoverageRelationStatistics Valid=463, Invalid=3077, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:25:57,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8230 states. [2021-07-13 20:25:57,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 6240. [2021-07-13 20:25:57,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6240 states, 6239 states have (on average 3.4199390928033337) internal successors, (21337), 6239 states have internal predecessors, (21337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:57,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6240 states to 6240 states and 21337 transitions. [2021-07-13 20:25:57,782 INFO L78 Accepts]: Start accepts. Automaton has 6240 states and 21337 transitions. Word has length 30 [2021-07-13 20:25:57,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:57,782 INFO L482 AbstractCegarLoop]: Abstraction has 6240 states and 21337 transitions. [2021-07-13 20:25:57,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:57,782 INFO L276 IsEmpty]: Start isEmpty. Operand 6240 states and 21337 transitions. [2021-07-13 20:25:57,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:25:57,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:57,791 INFO L508 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] [2021-07-13 20:25:57,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-07-13 20:25:57,991 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:57,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:57,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1158696, now seen corresponding path program 52 times [2021-07-13 20:25:57,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:57,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029415352] [2021-07-13 20:25:57,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:57,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:58,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:58,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:58,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029415352] [2021-07-13 20:25:58,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029415352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:58,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033120720] [2021-07-13 20:25:58,298 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:58,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:25:58,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:58,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:25:58,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:58,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:58,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:58,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:25:58,510 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:25:58,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:58,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:58,519 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-07-13 20:25:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:58,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033120720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:58,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:58,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 20:25:58,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291023172] [2021-07-13 20:25:58,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:25:58,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:58,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:25:58,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:25:58,594 INFO L87 Difference]: Start difference. First operand 6240 states and 21337 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:59,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:59,485 INFO L93 Difference]: Finished difference Result 8082 states and 27204 transitions. [2021-07-13 20:25:59,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:25:59,485 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:25:59,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:59,500 INFO L225 Difference]: With dead ends: 8082 [2021-07-13 20:25:59,501 INFO L226 Difference]: Without dead ends: 8057 [2021-07-13 20:25:59,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 738.2ms TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:25:59,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8057 states. [2021-07-13 20:25:59,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8057 to 6248. [2021-07-13 20:25:59,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6248 states, 6247 states have (on average 3.4194013126300624) internal successors, (21361), 6247 states have internal predecessors, (21361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:59,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6248 states to 6248 states and 21361 transitions. [2021-07-13 20:25:59,642 INFO L78 Accepts]: Start accepts. Automaton has 6248 states and 21361 transitions. Word has length 30 [2021-07-13 20:25:59,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:59,642 INFO L482 AbstractCegarLoop]: Abstraction has 6248 states and 21361 transitions. [2021-07-13 20:25:59,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:59,642 INFO L276 IsEmpty]: Start isEmpty. Operand 6248 states and 21361 transitions. [2021-07-13 20:25:59,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:25:59,651 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:59,651 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:59,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:59,851 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:59,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:59,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1228760081, now seen corresponding path program 22 times [2021-07-13 20:25:59,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:59,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346109348] [2021-07-13 20:25:59,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:00,237 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:00,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:00,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346109348] [2021-07-13 20:26:00,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346109348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:00,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083293564] [2021-07-13 20:26:00,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:00,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:26:00,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:00,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:26:00,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:00,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:00,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:00,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:26:00,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:26:00,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-13 20:26:00,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:00,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:00,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:00,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:26:00,504 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:00,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083293564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:00,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:00,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-07-13 20:26:00,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753340337] [2021-07-13 20:26:00,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:26:00,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:00,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:26:00,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:26:00,505 INFO L87 Difference]: Start difference. First operand 6248 states and 21361 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:02,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:02,783 INFO L93 Difference]: Finished difference Result 7816 states and 26141 transitions. [2021-07-13 20:26:02,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:26:02,783 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:26:02,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:02,801 INFO L225 Difference]: With dead ends: 7816 [2021-07-13 20:26:02,802 INFO L226 Difference]: Without dead ends: 7790 [2021-07-13 20:26:02,802 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1953.5ms TimeCoverageRelationStatistics Valid=515, Invalid=3145, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:26:02,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7790 states. [2021-07-13 20:26:02,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7790 to 6242. [2021-07-13 20:26:02,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6242 states, 6241 states have (on average 3.4202852107034127) internal successors, (21346), 6241 states have internal predecessors, (21346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:02,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6242 states to 6242 states and 21346 transitions. [2021-07-13 20:26:02,929 INFO L78 Accepts]: Start accepts. Automaton has 6242 states and 21346 transitions. Word has length 30 [2021-07-13 20:26:02,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:02,929 INFO L482 AbstractCegarLoop]: Abstraction has 6242 states and 21346 transitions. [2021-07-13 20:26:02,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:02,929 INFO L276 IsEmpty]: Start isEmpty. Operand 6242 states and 21346 transitions. [2021-07-13 20:26:02,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:26:02,939 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:02,939 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:03,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-07-13 20:26:03,140 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:03,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:03,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1051720055, now seen corresponding path program 23 times [2021-07-13 20:26:03,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:03,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68520065] [2021-07-13 20:26:03,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:03,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:03,501 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:03,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:03,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68520065] [2021-07-13 20:26:03,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68520065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:03,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139617017] [2021-07-13 20:26:03,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:03,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:26:03,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:03,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:26:03,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:03,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:03,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:03,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:26:03,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:26:03,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-13 20:26:03,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:03,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:03,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:03,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:26:03,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:03,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139617017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:03,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:03,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-07-13 20:26:03,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059838245] [2021-07-13 20:26:03,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:26:03,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:03,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:26:03,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:26:03,753 INFO L87 Difference]: Start difference. First operand 6242 states and 21346 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:05,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:05,614 INFO L93 Difference]: Finished difference Result 7732 states and 25924 transitions. [2021-07-13 20:26:05,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:26:05,615 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:26:05,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:05,632 INFO L225 Difference]: With dead ends: 7732 [2021-07-13 20:26:05,632 INFO L226 Difference]: Without dead ends: 7706 [2021-07-13 20:26:05,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1708.0ms TimeCoverageRelationStatistics Valid=529, Invalid=3253, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:26:05,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7706 states. [2021-07-13 20:26:05,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7706 to 6254. [2021-07-13 20:26:05,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6254 states, 6253 states have (on average 3.418519110826803) internal successors, (21376), 6253 states have internal predecessors, (21376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:05,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6254 states to 6254 states and 21376 transitions. [2021-07-13 20:26:05,757 INFO L78 Accepts]: Start accepts. Automaton has 6254 states and 21376 transitions. Word has length 30 [2021-07-13 20:26:05,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:05,757 INFO L482 AbstractCegarLoop]: Abstraction has 6254 states and 21376 transitions. [2021-07-13 20:26:05,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:05,757 INFO L276 IsEmpty]: Start isEmpty. Operand 6254 states and 21376 transitions. [2021-07-13 20:26:05,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:26:05,768 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:05,768 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:05,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-07-13 20:26:05,970 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:05,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:05,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1089482637, now seen corresponding path program 24 times [2021-07-13 20:26:05,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:05,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504250432] [2021-07-13 20:26:05,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:05,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:06,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:06,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504250432] [2021-07-13 20:26:06,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504250432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:06,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135442627] [2021-07-13 20:26:06,323 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:06,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:26:06,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:06,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:26:06,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:06,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:06,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:06,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:06,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:06,552 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 29 treesize of output 47 [2021-07-13 20:26:06,558 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:26:06,573 INFO L628 ElimStorePlain]: treesize reduction 28, result has 39.1 percent of original size [2021-07-13 20:26:06,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:06,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:28 [2021-07-13 20:26:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:06,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135442627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:06,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:06,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:26:06,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883592985] [2021-07-13 20:26:06,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:26:06,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:06,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:26:06,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:26:06,654 INFO L87 Difference]: Start difference. First operand 6254 states and 21376 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2021-07-13 20:26:09,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:09,414 INFO L93 Difference]: Finished difference Result 8414 states and 28160 transitions. [2021-07-13 20:26:09,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:26:09,414 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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 30 [2021-07-13 20:26:09,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:09,430 INFO L225 Difference]: With dead ends: 8414 [2021-07-13 20:26:09,431 INFO L226 Difference]: Without dead ends: 8388 [2021-07-13 20:26:09,431 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 2109.7ms TimeCoverageRelationStatistics Valid=588, Invalid=3968, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:26:09,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8388 states. [2021-07-13 20:26:09,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8388 to 6316. [2021-07-13 20:26:09,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6316 states, 6315 states have (on average 3.4134600158353128) internal successors, (21556), 6315 states have internal predecessors, (21556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:09,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6316 states to 6316 states and 21556 transitions. [2021-07-13 20:26:09,564 INFO L78 Accepts]: Start accepts. Automaton has 6316 states and 21556 transitions. Word has length 30 [2021-07-13 20:26:09,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:09,564 INFO L482 AbstractCegarLoop]: Abstraction has 6316 states and 21556 transitions. [2021-07-13 20:26:09,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2021-07-13 20:26:09,564 INFO L276 IsEmpty]: Start isEmpty. Operand 6316 states and 21556 transitions. [2021-07-13 20:26:09,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:26:09,574 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:09,574 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:09,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-07-13 20:26:09,774 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:09,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:09,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1630768673, now seen corresponding path program 25 times [2021-07-13 20:26:09,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:09,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024654721] [2021-07-13 20:26:09,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:10,144 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:10,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:10,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024654721] [2021-07-13 20:26:10,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024654721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:10,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356896431] [2021-07-13 20:26:10,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:10,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:10,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:26:10,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:10,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:10,431 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-07-13 20:26:10,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 86 treesize of output 58 [2021-07-13 20:26:10,433 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:10,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:10,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:10,438 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:89, output treesize:13 [2021-07-13 20:26:10,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:10,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356896431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:10,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:10,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-07-13 20:26:10,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335187926] [2021-07-13 20:26:10,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:26:10,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:10,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:26:10,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:26:10,497 INFO L87 Difference]: Start difference. First operand 6316 states and 21556 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 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) [2021-07-13 20:26:12,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:12,635 INFO L93 Difference]: Finished difference Result 7885 states and 26351 transitions. [2021-07-13 20:26:12,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:26:12,636 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 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 30 [2021-07-13 20:26:12,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:12,653 INFO L225 Difference]: With dead ends: 7885 [2021-07-13 20:26:12,653 INFO L226 Difference]: Without dead ends: 7859 [2021-07-13 20:26:12,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 1944.5ms TimeCoverageRelationStatistics Valid=564, Invalid=3596, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:26:12,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7859 states. [2021-07-13 20:26:12,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7859 to 6324. [2021-07-13 20:26:12,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6324 states, 6323 states have (on average 3.4123042859402184) internal successors, (21576), 6323 states have internal predecessors, (21576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:12,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6324 states to 6324 states and 21576 transitions. [2021-07-13 20:26:12,778 INFO L78 Accepts]: Start accepts. Automaton has 6324 states and 21576 transitions. Word has length 30 [2021-07-13 20:26:12,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:12,778 INFO L482 AbstractCegarLoop]: Abstraction has 6324 states and 21576 transitions. [2021-07-13 20:26:12,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 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) [2021-07-13 20:26:12,778 INFO L276 IsEmpty]: Start isEmpty. Operand 6324 states and 21576 transitions. [2021-07-13 20:26:12,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:26:12,789 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:12,789 INFO L508 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] [2021-07-13 20:26:12,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:12,989 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:12,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:12,990 INFO L82 PathProgramCache]: Analyzing trace with hash -2139112310, now seen corresponding path program 53 times [2021-07-13 20:26:12,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:12,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357094411] [2021-07-13 20:26:12,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:12,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:13,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:13,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:13,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357094411] [2021-07-13 20:26:13,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357094411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:13,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231076686] [2021-07-13 20:26:13,314 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:13,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:26:13,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:13,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:26:13,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:13,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:13,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:26:13,535 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 28 treesize of output 16 [2021-07-13 20:26:13,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:13,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:13,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:13,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-07-13 20:26:13,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:13,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231076686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:13,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:13,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-07-13 20:26:13,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786054888] [2021-07-13 20:26:13,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:26:13,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:13,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:26:13,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:26:13,565 INFO L87 Difference]: Start difference. First operand 6324 states and 21576 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:15,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:15,413 INFO L93 Difference]: Finished difference Result 7989 states and 26816 transitions. [2021-07-13 20:26:15,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:26:15,414 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:26:15,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:15,430 INFO L225 Difference]: With dead ends: 7989 [2021-07-13 20:26:15,431 INFO L226 Difference]: Without dead ends: 7968 [2021-07-13 20:26:15,431 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1578.1ms TimeCoverageRelationStatistics Valid=297, Invalid=1959, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:26:15,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7968 states. [2021-07-13 20:26:15,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7968 to 6356. [2021-07-13 20:26:15,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6356 states, 6355 states have (on average 3.411644374508261) internal successors, (21681), 6355 states have internal predecessors, (21681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:15,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6356 states to 6356 states and 21681 transitions. [2021-07-13 20:26:15,558 INFO L78 Accepts]: Start accepts. Automaton has 6356 states and 21681 transitions. Word has length 30 [2021-07-13 20:26:15,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:15,558 INFO L482 AbstractCegarLoop]: Abstraction has 6356 states and 21681 transitions. [2021-07-13 20:26:15,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:15,558 INFO L276 IsEmpty]: Start isEmpty. Operand 6356 states and 21681 transitions. [2021-07-13 20:26:15,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:26:15,569 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:15,569 INFO L508 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] [2021-07-13 20:26:15,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:15,770 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:15,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:15,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1940768934, now seen corresponding path program 54 times [2021-07-13 20:26:15,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:15,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000202843] [2021-07-13 20:26:15,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:15,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:16,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:16,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000202843] [2021-07-13 20:26:16,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000202843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:16,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452529864] [2021-07-13 20:26:16,073 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:16,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:26:16,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:16,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:26:16,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:16,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:16,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:16,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:26:16,257 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:26:16,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:16,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:16,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-13 20:26:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:16,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452529864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:16,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:16,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:26:16,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113649871] [2021-07-13 20:26:16,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:26:16,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:16,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:26:16,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:26:16,317 INFO L87 Difference]: Start difference. First operand 6356 states and 21681 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:18,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:18,535 INFO L93 Difference]: Finished difference Result 9388 states and 31190 transitions. [2021-07-13 20:26:18,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:26:18,536 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:26:18,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:18,557 INFO L225 Difference]: With dead ends: 9388 [2021-07-13 20:26:18,557 INFO L226 Difference]: Without dead ends: 9344 [2021-07-13 20:26:18,558 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 1769.9ms TimeCoverageRelationStatistics Valid=481, Invalid=3059, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:26:18,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9344 states. [2021-07-13 20:26:18,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9344 to 6373. [2021-07-13 20:26:18,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6373 states, 6372 states have (on average 3.4110169491525424) internal successors, (21735), 6372 states have internal predecessors, (21735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:18,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6373 states to 6373 states and 21735 transitions. [2021-07-13 20:26:18,703 INFO L78 Accepts]: Start accepts. Automaton has 6373 states and 21735 transitions. Word has length 30 [2021-07-13 20:26:18,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:18,703 INFO L482 AbstractCegarLoop]: Abstraction has 6373 states and 21735 transitions. [2021-07-13 20:26:18,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:18,703 INFO L276 IsEmpty]: Start isEmpty. Operand 6373 states and 21735 transitions. [2021-07-13 20:26:18,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:26:18,713 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:18,713 INFO L508 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] [2021-07-13 20:26:18,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:18,915 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:18,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:18,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1538373058, now seen corresponding path program 55 times [2021-07-13 20:26:18,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:18,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658300233] [2021-07-13 20:26:18,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:18,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:19,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:19,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:19,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658300233] [2021-07-13 20:26:19,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658300233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:19,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131139461] [2021-07-13 20:26:19,289 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:19,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:26:19,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:19,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:19,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:19,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:19,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:26:19,476 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:19,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2021-07-13 20:26:19,477 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:26:19,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:19,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:19,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:28 [2021-07-13 20:26:19,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:19,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131139461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:19,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:19,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 20:26:19,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535869023] [2021-07-13 20:26:19,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:26:19,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:19,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:26:19,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:26:19,567 INFO L87 Difference]: Start difference. First operand 6373 states and 21735 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-07-13 20:26:21,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:21,221 INFO L93 Difference]: Finished difference Result 8603 states and 28835 transitions. [2021-07-13 20:26:21,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:26:21,221 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:26:21,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:21,239 INFO L225 Difference]: With dead ends: 8603 [2021-07-13 20:26:21,240 INFO L226 Difference]: Without dead ends: 8553 [2021-07-13 20:26:21,240 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1422.2ms TimeCoverageRelationStatistics Valid=363, Invalid=1989, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:26:21,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8553 states. [2021-07-13 20:26:21,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8553 to 6375. [2021-07-13 20:26:21,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6375 states, 6374 states have (on average 3.411201757138375) internal successors, (21743), 6374 states have internal predecessors, (21743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:21,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6375 states to 6375 states and 21743 transitions. [2021-07-13 20:26:21,392 INFO L78 Accepts]: Start accepts. Automaton has 6375 states and 21743 transitions. Word has length 30 [2021-07-13 20:26:21,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:21,392 INFO L482 AbstractCegarLoop]: Abstraction has 6375 states and 21743 transitions. [2021-07-13 20:26:21,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-07-13 20:26:21,392 INFO L276 IsEmpty]: Start isEmpty. Operand 6375 states and 21743 transitions. [2021-07-13 20:26:21,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:26:21,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:21,402 INFO L508 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] [2021-07-13 20:26:21,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-07-13 20:26:21,602 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:21,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:21,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1512950702, now seen corresponding path program 56 times [2021-07-13 20:26:21,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:21,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227087236] [2021-07-13 20:26:21,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:21,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:21,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227087236] [2021-07-13 20:26:21,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227087236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:21,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244427339] [2021-07-13 20:26:21,921 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:21,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:26:21,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:21,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:26:21,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:22,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:22,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:22,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:26:22,124 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:26:22,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:22,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:22,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-13 20:26:22,177 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:22,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244427339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:22,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:22,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 20:26:22,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831486632] [2021-07-13 20:26:22,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:26:22,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:22,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:26:22,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:26:22,178 INFO L87 Difference]: Start difference. First operand 6375 states and 21743 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:23,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:23,321 INFO L93 Difference]: Finished difference Result 8550 states and 28635 transitions. [2021-07-13 20:26:23,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:26:23,322 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:26:23,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:23,340 INFO L225 Difference]: With dead ends: 8550 [2021-07-13 20:26:23,340 INFO L226 Difference]: Without dead ends: 8525 [2021-07-13 20:26:23,340 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 938.8ms TimeCoverageRelationStatistics Valid=232, Invalid=1408, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:26:23,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8525 states. [2021-07-13 20:26:23,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8525 to 6366. [2021-07-13 20:26:23,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6366 states, 6365 states have (on average 3.4120974076983503) internal successors, (21718), 6365 states have internal predecessors, (21718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:23,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6366 states to 6366 states and 21718 transitions. [2021-07-13 20:26:23,514 INFO L78 Accepts]: Start accepts. Automaton has 6366 states and 21718 transitions. Word has length 30 [2021-07-13 20:26:23,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:23,514 INFO L482 AbstractCegarLoop]: Abstraction has 6366 states and 21718 transitions. [2021-07-13 20:26:23,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:23,514 INFO L276 IsEmpty]: Start isEmpty. Operand 6366 states and 21718 transitions. [2021-07-13 20:26:23,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:26:23,524 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:23,524 INFO L508 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] [2021-07-13 20:26:23,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-07-13 20:26:23,725 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:23,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:23,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1366348758, now seen corresponding path program 57 times [2021-07-13 20:26:23,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:23,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161910367] [2021-07-13 20:26:23,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:24,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:24,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:24,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161910367] [2021-07-13 20:26:24,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161910367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:24,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240400747] [2021-07-13 20:26:24,139 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:24,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:26:24,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:24,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:26:24,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:24,337 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:24,337 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 19 treesize of output 35 [2021-07-13 20:26:24,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:26:24,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:24,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:24,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:274 [2021-07-13 20:26:24,546 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-07-13 20:26:24,794 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-07-13 20:26:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:24,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240400747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:24,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:24,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-07-13 20:26:24,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742294042] [2021-07-13 20:26:24,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:26:24,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:24,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:26:24,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:26:24,942 INFO L87 Difference]: Start difference. First operand 6366 states and 21718 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:26,438 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-07-13 20:26:26,614 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 40 [2021-07-13 20:26:26,968 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-07-13 20:26:27,213 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-07-13 20:26:27,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:27,513 INFO L93 Difference]: Finished difference Result 8916 states and 29779 transitions. [2021-07-13 20:26:27,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:26:27,513 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:26:27,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:27,531 INFO L225 Difference]: With dead ends: 8916 [2021-07-13 20:26:27,531 INFO L226 Difference]: Without dead ends: 8853 [2021-07-13 20:26:27,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 2569.8ms TimeCoverageRelationStatistics Valid=314, Invalid=2136, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:26:27,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8853 states. [2021-07-13 20:26:27,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8853 to 6375. [2021-07-13 20:26:27,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6375 states, 6374 states have (on average 3.41214308126765) internal successors, (21749), 6374 states have internal predecessors, (21749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:27,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6375 states to 6375 states and 21749 transitions. [2021-07-13 20:26:27,651 INFO L78 Accepts]: Start accepts. Automaton has 6375 states and 21749 transitions. Word has length 30 [2021-07-13 20:26:27,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:27,651 INFO L482 AbstractCegarLoop]: Abstraction has 6375 states and 21749 transitions. [2021-07-13 20:26:27,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:27,651 INFO L276 IsEmpty]: Start isEmpty. Operand 6375 states and 21749 transitions. [2021-07-13 20:26:27,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:26:27,662 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:27,662 INFO L508 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] [2021-07-13 20:26:27,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:27,865 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:27,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:27,865 INFO L82 PathProgramCache]: Analyzing trace with hash 764161106, now seen corresponding path program 58 times [2021-07-13 20:26:27,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:27,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983291979] [2021-07-13 20:26:27,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:28,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:28,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:28,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983291979] [2021-07-13 20:26:28,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983291979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:28,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915784284] [2021-07-13 20:26:28,170 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:28,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:26:28,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:28,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:26:28,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:28,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:28,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:28,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:26:28,410 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:26:28,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:28,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:28,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-07-13 20:26:28,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:28,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915784284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:28,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:28,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-07-13 20:26:28,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329267865] [2021-07-13 20:26:28,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:26:28,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:28,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:26:28,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:26:28,494 INFO L87 Difference]: Start difference. First operand 6375 states and 21749 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:29,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:29,592 INFO L93 Difference]: Finished difference Result 8258 states and 27729 transitions. [2021-07-13 20:26:29,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:26:29,593 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:26:29,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:29,611 INFO L225 Difference]: With dead ends: 8258 [2021-07-13 20:26:29,611 INFO L226 Difference]: Without dead ends: 8233 [2021-07-13 20:26:29,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 903.1ms TimeCoverageRelationStatistics Valid=217, Invalid=1423, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:26:29,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8233 states. [2021-07-13 20:26:29,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8233 to 6373. [2021-07-13 20:26:29,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6373 states, 6372 states have (on average 3.412272441933459) internal successors, (21743), 6372 states have internal predecessors, (21743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:29,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6373 states to 6373 states and 21743 transitions. [2021-07-13 20:26:29,739 INFO L78 Accepts]: Start accepts. Automaton has 6373 states and 21743 transitions. Word has length 30 [2021-07-13 20:26:29,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:29,739 INFO L482 AbstractCegarLoop]: Abstraction has 6373 states and 21743 transitions. [2021-07-13 20:26:29,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:29,739 INFO L276 IsEmpty]: Start isEmpty. Operand 6373 states and 21743 transitions. [2021-07-13 20:26:29,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:26:29,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:29,750 INFO L508 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] [2021-07-13 20:26:29,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:29,951 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:29,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:29,952 INFO L82 PathProgramCache]: Analyzing trace with hash -175548318, now seen corresponding path program 59 times [2021-07-13 20:26:29,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:29,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193880603] [2021-07-13 20:26:29,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:30,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:30,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:30,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193880603] [2021-07-13 20:26:30,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193880603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:30,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157233840] [2021-07-13 20:26:30,294 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:30,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:26:30,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:30,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:26:30,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:30,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:30,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:26:30,530 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 28 treesize of output 16 [2021-07-13 20:26:30,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:30,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:30,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:30,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-07-13 20:26:30,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:30,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157233840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:30,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:30,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-07-13 20:26:30,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334051655] [2021-07-13 20:26:30,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:26:30,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:30,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:26:30,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:26:30,606 INFO L87 Difference]: Start difference. First operand 6373 states and 21743 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:33,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:33,085 INFO L93 Difference]: Finished difference Result 8585 states and 28565 transitions. [2021-07-13 20:26:33,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:26:33,086 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:26:33,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:33,103 INFO L225 Difference]: With dead ends: 8585 [2021-07-13 20:26:33,103 INFO L226 Difference]: Without dead ends: 8570 [2021-07-13 20:26:33,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2172.7ms TimeCoverageRelationStatistics Valid=526, Invalid=2780, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:26:33,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8570 states. [2021-07-13 20:26:33,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8570 to 6394. [2021-07-13 20:26:33,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6394 states, 6393 states have (on average 3.4135773502268107) internal successors, (21823), 6393 states have internal predecessors, (21823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:33,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6394 states to 6394 states and 21823 transitions. [2021-07-13 20:26:33,237 INFO L78 Accepts]: Start accepts. Automaton has 6394 states and 21823 transitions. Word has length 30 [2021-07-13 20:26:33,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:33,237 INFO L482 AbstractCegarLoop]: Abstraction has 6394 states and 21823 transitions. [2021-07-13 20:26:33,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:33,237 INFO L276 IsEmpty]: Start isEmpty. Operand 6394 states and 21823 transitions. [2021-07-13 20:26:33,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:26:33,247 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:33,247 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:33,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:33,456 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:33,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:33,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1737022281, now seen corresponding path program 26 times [2021-07-13 20:26:33,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:33,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98205911] [2021-07-13 20:26:33,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:33,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:33,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:33,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98205911] [2021-07-13 20:26:33,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98205911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:33,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117576178] [2021-07-13 20:26:33,930 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:33,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:26:33,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:33,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:26:33,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:34,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:34,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:34,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:26:34,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:26:34,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-13 20:26:34,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:34,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:34,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:34,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:26:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:34,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117576178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:34,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:34,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-07-13 20:26:34,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93349774] [2021-07-13 20:26:34,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:26:34,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:34,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:26:34,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:26:34,283 INFO L87 Difference]: Start difference. First operand 6394 states and 21823 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 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) [2021-07-13 20:26:39,433 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-07-13 20:26:39,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:39,914 INFO L93 Difference]: Finished difference Result 8768 states and 28896 transitions. [2021-07-13 20:26:39,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-07-13 20:26:39,915 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 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 30 [2021-07-13 20:26:39,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:39,932 INFO L225 Difference]: With dead ends: 8768 [2021-07-13 20:26:39,932 INFO L226 Difference]: Without dead ends: 8735 [2021-07-13 20:26:39,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3330 ImplicationChecksByTransitivity, 4892.2ms TimeCoverageRelationStatistics Valid=1406, Invalid=8694, Unknown=0, NotChecked=0, Total=10100 [2021-07-13 20:26:39,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8735 states. [2021-07-13 20:26:40,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8735 to 6450. [2021-07-13 20:26:40,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6450 states, 6449 states have (on average 3.4129322375562103) internal successors, (22010), 6449 states have internal predecessors, (22010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:40,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6450 states to 6450 states and 22010 transitions. [2021-07-13 20:26:40,044 INFO L78 Accepts]: Start accepts. Automaton has 6450 states and 22010 transitions. Word has length 30 [2021-07-13 20:26:40,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:40,045 INFO L482 AbstractCegarLoop]: Abstraction has 6450 states and 22010 transitions. [2021-07-13 20:26:40,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 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) [2021-07-13 20:26:40,045 INFO L276 IsEmpty]: Start isEmpty. Operand 6450 states and 22010 transitions. [2021-07-13 20:26:40,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:26:40,054 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:40,054 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:40,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:40,254 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:40,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:40,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1248501593, now seen corresponding path program 27 times [2021-07-13 20:26:40,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:40,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875579157] [2021-07-13 20:26:40,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:40,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:40,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:40,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875579157] [2021-07-13 20:26:40,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875579157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:40,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992367111] [2021-07-13 20:26:40,552 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:40,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:26:40,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:40,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:26:40,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:40,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:40,892 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-07-13 20:26:40,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 86 treesize of output 78 [2021-07-13 20:26:40,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:40,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:40,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:40,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:89, output treesize:18 [2021-07-13 20:26:41,017 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:41,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992367111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:41,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:41,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-07-13 20:26:41,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811759042] [2021-07-13 20:26:41,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:26:41,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:41,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:26:41,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:26:41,019 INFO L87 Difference]: Start difference. First operand 6450 states and 22010 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:42,371 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-07-13 20:26:43,544 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-07-13 20:26:44,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:44,313 INFO L93 Difference]: Finished difference Result 10387 states and 34070 transitions. [2021-07-13 20:26:44,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:26:44,314 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:26:44,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:44,335 INFO L225 Difference]: With dead ends: 10387 [2021-07-13 20:26:44,335 INFO L226 Difference]: Without dead ends: 10372 [2021-07-13 20:26:44,336 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 2657.3ms TimeCoverageRelationStatistics Valid=647, Invalid=4465, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:26:44,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10372 states. [2021-07-13 20:26:44,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10372 to 6469. [2021-07-13 20:26:44,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6469 states, 6468 states have (on average 3.41017316017316) internal successors, (22057), 6468 states have internal predecessors, (22057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:44,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6469 states to 6469 states and 22057 transitions. [2021-07-13 20:26:44,480 INFO L78 Accepts]: Start accepts. Automaton has 6469 states and 22057 transitions. Word has length 30 [2021-07-13 20:26:44,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:44,480 INFO L482 AbstractCegarLoop]: Abstraction has 6469 states and 22057 transitions. [2021-07-13 20:26:44,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:44,480 INFO L276 IsEmpty]: Start isEmpty. Operand 6469 states and 22057 transitions. [2021-07-13 20:26:44,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:26:44,491 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:44,491 INFO L508 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] [2021-07-13 20:26:44,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:44,691 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:44,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:44,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1869142242, now seen corresponding path program 60 times [2021-07-13 20:26:44,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:44,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957494161] [2021-07-13 20:26:44,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:45,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:45,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:45,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957494161] [2021-07-13 20:26:45,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957494161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:45,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129632969] [2021-07-13 20:26:45,019 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:45,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:26:45,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:45,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:26:45,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:45,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:45,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:45,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-07-13 20:26:45,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:26:45,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:45,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:45,291 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:142 [2021-07-13 20:26:45,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:45,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129632969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:45,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:45,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:26:45,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106302670] [2021-07-13 20:26:45,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:26:45,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:45,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:26:45,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:26:45,518 INFO L87 Difference]: Start difference. First operand 6469 states and 22057 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:47,812 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-07-13 20:26:48,057 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-07-13 20:26:48,308 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-07-13 20:26:48,545 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-07-13 20:26:49,145 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-07-13 20:26:50,426 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2021-07-13 20:26:50,566 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-07-13 20:26:50,984 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2021-07-13 20:26:52,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:52,760 INFO L93 Difference]: Finished difference Result 9384 states and 30854 transitions. [2021-07-13 20:26:52,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-07-13 20:26:52,760 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:26:52,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:52,781 INFO L225 Difference]: With dead ends: 9384 [2021-07-13 20:26:52,781 INFO L226 Difference]: Without dead ends: 9343 [2021-07-13 20:26:52,782 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3771 ImplicationChecksByTransitivity, 6361.3ms TimeCoverageRelationStatistics Valid=1325, Invalid=9181, Unknown=0, NotChecked=0, Total=10506 [2021-07-13 20:26:52,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9343 states. [2021-07-13 20:26:52,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9343 to 6512. [2021-07-13 20:26:52,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6512 states, 6511 states have (on average 3.412225464598372) internal successors, (22217), 6511 states have internal predecessors, (22217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:52,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6512 states to 6512 states and 22217 transitions. [2021-07-13 20:26:52,937 INFO L78 Accepts]: Start accepts. Automaton has 6512 states and 22217 transitions. Word has length 30 [2021-07-13 20:26:52,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:52,937 INFO L482 AbstractCegarLoop]: Abstraction has 6512 states and 22217 transitions. [2021-07-13 20:26:52,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:52,937 INFO L276 IsEmpty]: Start isEmpty. Operand 6512 states and 22217 transitions. [2021-07-13 20:26:52,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:26:52,948 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:52,948 INFO L508 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] [2021-07-13 20:26:53,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:53,149 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:53,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:53,149 INFO L82 PathProgramCache]: Analyzing trace with hash -257494774, now seen corresponding path program 61 times [2021-07-13 20:26:53,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:53,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842819437] [2021-07-13 20:26:53,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:53,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:53,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:53,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842819437] [2021-07-13 20:26:53,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842819437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:53,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775291588] [2021-07-13 20:26:53,474 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:53,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:26:53,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:53,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:53,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:53,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:26:53,686 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:26:53,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:53,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:53,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-13 20:26:53,740 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:53,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775291588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:53,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:53,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 20:26:53,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879965685] [2021-07-13 20:26:53,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:26:53,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:53,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:26:53,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:26:53,742 INFO L87 Difference]: Start difference. First operand 6512 states and 22217 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-07-13 20:26:58,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:58,158 INFO L93 Difference]: Finished difference Result 9850 states and 32506 transitions. [2021-07-13 20:26:58,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-13 20:26:58,158 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:26:58,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:58,179 INFO L225 Difference]: With dead ends: 9850 [2021-07-13 20:26:58,180 INFO L226 Difference]: Without dead ends: 9812 [2021-07-13 20:26:58,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2328 ImplicationChecksByTransitivity, 3694.0ms TimeCoverageRelationStatistics Valid=970, Invalid=5836, Unknown=0, NotChecked=0, Total=6806 [2021-07-13 20:26:58,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9812 states. [2021-07-13 20:26:58,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9812 to 6527. [2021-07-13 20:26:58,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6527 states, 6526 states have (on average 3.4121973643885997) internal successors, (22268), 6526 states have internal predecessors, (22268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:58,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6527 states to 6527 states and 22268 transitions. [2021-07-13 20:26:58,326 INFO L78 Accepts]: Start accepts. Automaton has 6527 states and 22268 transitions. Word has length 30 [2021-07-13 20:26:58,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:58,326 INFO L482 AbstractCegarLoop]: Abstraction has 6527 states and 22268 transitions. [2021-07-13 20:26:58,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-07-13 20:26:58,327 INFO L276 IsEmpty]: Start isEmpty. Operand 6527 states and 22268 transitions. [2021-07-13 20:26:58,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:26:58,338 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:58,338 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:58,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-07-13 20:26:58,540 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:58,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:58,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1531873319, now seen corresponding path program 28 times [2021-07-13 20:26:58,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:58,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798834937] [2021-07-13 20:26:58,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:58,842 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:58,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:58,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798834937] [2021-07-13 20:26:58,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798834937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:58,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659706504] [2021-07-13 20:26:58,843 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:58,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:26:58,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:58,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:26:58,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:59,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:59,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:59,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:26:59,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:26:59,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-13 20:26:59,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:59,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:59,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:59,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:26:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:59,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659706504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:59,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:59,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-07-13 20:26:59,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126511616] [2021-07-13 20:26:59,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:26:59,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:59,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:26:59,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:26:59,094 INFO L87 Difference]: Start difference. First operand 6527 states and 22268 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:02,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:02,321 INFO L93 Difference]: Finished difference Result 10842 states and 35758 transitions. [2021-07-13 20:27:02,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:27:02,321 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:27:02,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:02,348 INFO L225 Difference]: With dead ends: 10842 [2021-07-13 20:27:02,349 INFO L226 Difference]: Without dead ends: 10821 [2021-07-13 20:27:02,349 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 2514.9ms TimeCoverageRelationStatistics Valid=747, Invalid=4509, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:27:02,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10821 states. [2021-07-13 20:27:02,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10821 to 6634. [2021-07-13 20:27:02,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6634 states, 6633 states have (on average 3.4168551183476557) internal successors, (22664), 6633 states have internal predecessors, (22664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:02,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6634 states to 6634 states and 22664 transitions. [2021-07-13 20:27:02,531 INFO L78 Accepts]: Start accepts. Automaton has 6634 states and 22664 transitions. Word has length 30 [2021-07-13 20:27:02,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:02,531 INFO L482 AbstractCegarLoop]: Abstraction has 6634 states and 22664 transitions. [2021-07-13 20:27:02,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:02,532 INFO L276 IsEmpty]: Start isEmpty. Operand 6634 states and 22664 transitions. [2021-07-13 20:27:02,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:27:02,544 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:02,544 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:02,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:02,744 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:02,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:02,745 INFO L82 PathProgramCache]: Analyzing trace with hash 241234517, now seen corresponding path program 29 times [2021-07-13 20:27:02,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:02,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148281994] [2021-07-13 20:27:02,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:02,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:03,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:03,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:03,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148281994] [2021-07-13 20:27:03,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148281994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:03,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056143075] [2021-07-13 20:27:03,049 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:03,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:27:03,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:03,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:27:03,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:03,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:03,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:03,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:03,255 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 21 treesize of output 39 [2021-07-13 20:27:03,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:27:03,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:03,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:03,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-13 20:27:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:03,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056143075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:03,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:03,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-07-13 20:27:03,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315567364] [2021-07-13 20:27:03,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:27:03,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:03,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:27:03,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:27:03,316 INFO L87 Difference]: Start difference. First operand 6634 states and 22664 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:04,645 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-07-13 20:27:06,408 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-07-13 20:27:07,126 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-07-13 20:27:07,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:07,872 INFO L93 Difference]: Finished difference Result 11958 states and 39090 transitions. [2021-07-13 20:27:07,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-13 20:27:07,873 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:27:07,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:07,899 INFO L225 Difference]: With dead ends: 11958 [2021-07-13 20:27:07,899 INFO L226 Difference]: Without dead ends: 11901 [2021-07-13 20:27:07,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2838 ImplicationChecksByTransitivity, 3824.4ms TimeCoverageRelationStatistics Valid=1317, Invalid=7239, Unknown=0, NotChecked=0, Total=8556 [2021-07-13 20:27:07,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11901 states. [2021-07-13 20:27:08,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11901 to 6665. [2021-07-13 20:27:08,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6665 states, 6664 states have (on average 3.4191176470588234) internal successors, (22785), 6664 states have internal predecessors, (22785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:08,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6665 states to 6665 states and 22785 transitions. [2021-07-13 20:27:08,077 INFO L78 Accepts]: Start accepts. Automaton has 6665 states and 22785 transitions. Word has length 30 [2021-07-13 20:27:08,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:08,077 INFO L482 AbstractCegarLoop]: Abstraction has 6665 states and 22785 transitions. [2021-07-13 20:27:08,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:08,077 INFO L276 IsEmpty]: Start isEmpty. Operand 6665 states and 22785 transitions. [2021-07-13 20:27:08,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:27:08,087 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:08,087 INFO L508 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] [2021-07-13 20:27:08,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable307 [2021-07-13 20:27:08,288 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:08,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:08,288 INFO L82 PathProgramCache]: Analyzing trace with hash -49932476, now seen corresponding path program 62 times [2021-07-13 20:27:08,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:08,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018439727] [2021-07-13 20:27:08,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:08,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:08,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:08,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:08,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018439727] [2021-07-13 20:27:08,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018439727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:08,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401196184] [2021-07-13 20:27:08,590 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:08,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:27:08,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:08,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:27:08,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:08,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:08,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-07-13 20:27:08,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:27:08,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:08,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:08,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:127 [2021-07-13 20:27:08,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:08,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401196184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:08,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:08,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:27:08,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691179814] [2021-07-13 20:27:08,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:27:08,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:08,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:27:08,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:27:08,994 INFO L87 Difference]: Start difference. First operand 6665 states and 22785 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:11,321 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-07-13 20:27:11,725 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-07-13 20:27:12,940 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2021-07-13 20:27:14,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:14,553 INFO L93 Difference]: Finished difference Result 9555 states and 31508 transitions. [2021-07-13 20:27:14,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-13 20:27:14,553 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:27:14,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:14,573 INFO L225 Difference]: With dead ends: 9555 [2021-07-13 20:27:14,573 INFO L226 Difference]: Without dead ends: 9497 [2021-07-13 20:27:14,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3038 ImplicationChecksByTransitivity, 4476.6ms TimeCoverageRelationStatistics Valid=997, Invalid=7745, Unknown=0, NotChecked=0, Total=8742 [2021-07-13 20:27:14,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9497 states. [2021-07-13 20:27:14,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9497 to 6661. [2021-07-13 20:27:14,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6661 states, 6660 states have (on average 3.4181681681681684) internal successors, (22765), 6660 states have internal predecessors, (22765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:14,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6661 states to 6661 states and 22765 transitions. [2021-07-13 20:27:14,744 INFO L78 Accepts]: Start accepts. Automaton has 6661 states and 22765 transitions. Word has length 30 [2021-07-13 20:27:14,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:14,744 INFO L482 AbstractCegarLoop]: Abstraction has 6661 states and 22765 transitions. [2021-07-13 20:27:14,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:14,745 INFO L276 IsEmpty]: Start isEmpty. Operand 6661 states and 22765 transitions. [2021-07-13 20:27:14,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:27:14,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:14,754 INFO L508 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] [2021-07-13 20:27:14,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-07-13 20:27:14,955 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:14,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:14,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1734813122, now seen corresponding path program 63 times [2021-07-13 20:27:14,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:14,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552564369] [2021-07-13 20:27:14,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:15,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:15,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:15,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552564369] [2021-07-13 20:27:15,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552564369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:15,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416794049] [2021-07-13 20:27:15,255 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:15,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:27:15,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:15,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:27:15,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:15,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:15,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:15,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:27:15,408 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:27:15,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:15,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:15,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-13 20:27:15,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:15,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416794049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:15,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:15,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:27:15,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212666938] [2021-07-13 20:27:15,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:27:15,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:15,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:27:15,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:27:15,480 INFO L87 Difference]: Start difference. First operand 6661 states and 22765 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:18,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:18,989 INFO L93 Difference]: Finished difference Result 9025 states and 30264 transitions. [2021-07-13 20:27:18,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:27:18,989 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:27:18,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:19,009 INFO L225 Difference]: With dead ends: 9025 [2021-07-13 20:27:19,010 INFO L226 Difference]: Without dead ends: 9000 [2021-07-13 20:27:19,010 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 2782.9ms TimeCoverageRelationStatistics Valid=655, Invalid=4457, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:27:19,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9000 states. [2021-07-13 20:27:19,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9000 to 6636. [2021-07-13 20:27:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6636 states, 6635 states have (on average 3.417633760361718) internal successors, (22676), 6635 states have internal predecessors, (22676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:19,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6636 states to 6636 states and 22676 transitions. [2021-07-13 20:27:19,138 INFO L78 Accepts]: Start accepts. Automaton has 6636 states and 22676 transitions. Word has length 30 [2021-07-13 20:27:19,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:19,139 INFO L482 AbstractCegarLoop]: Abstraction has 6636 states and 22676 transitions. [2021-07-13 20:27:19,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:19,139 INFO L276 IsEmpty]: Start isEmpty. Operand 6636 states and 22676 transitions. [2021-07-13 20:27:19,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:27:19,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:19,149 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:19,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:19,349 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:19,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:19,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1517125215, now seen corresponding path program 30 times [2021-07-13 20:27:19,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:19,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865253257] [2021-07-13 20:27:19,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:19,870 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:19,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:19,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865253257] [2021-07-13 20:27:19,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865253257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:19,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054051466] [2021-07-13 20:27:19,871 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:19,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:27:19,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:19,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:27:19,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:20,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:20,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:20,069 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:20,069 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 21 treesize of output 39 [2021-07-13 20:27:20,074 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:27:20,096 INFO L628 ElimStorePlain]: treesize reduction 45, result has 28.6 percent of original size [2021-07-13 20:27:20,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:20,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-13 20:27:20,165 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:20,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054051466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:20,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:20,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:27:20,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332771708] [2021-07-13 20:27:20,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:27:20,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:20,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:27:20,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:27:20,166 INFO L87 Difference]: Start difference. First operand 6636 states and 22676 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:24,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:24,400 INFO L93 Difference]: Finished difference Result 9140 states and 30189 transitions. [2021-07-13 20:27:24,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:27:24,400 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:27:24,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:24,421 INFO L225 Difference]: With dead ends: 9140 [2021-07-13 20:27:24,422 INFO L226 Difference]: Without dead ends: 9091 [2021-07-13 20:27:24,422 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2324 ImplicationChecksByTransitivity, 3514.5ms TimeCoverageRelationStatistics Valid=953, Invalid=6529, Unknown=0, NotChecked=0, Total=7482 [2021-07-13 20:27:24,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9091 states. [2021-07-13 20:27:24,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9091 to 6597. [2021-07-13 20:27:24,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6597 states, 6596 states have (on average 3.4181322013341418) internal successors, (22546), 6596 states have internal predecessors, (22546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:24,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6597 states to 6597 states and 22546 transitions. [2021-07-13 20:27:24,594 INFO L78 Accepts]: Start accepts. Automaton has 6597 states and 22546 transitions. Word has length 30 [2021-07-13 20:27:24,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:24,594 INFO L482 AbstractCegarLoop]: Abstraction has 6597 states and 22546 transitions. [2021-07-13 20:27:24,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:24,594 INFO L276 IsEmpty]: Start isEmpty. Operand 6597 states and 22546 transitions. [2021-07-13 20:27:24,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:27:24,605 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:24,605 INFO L508 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] [2021-07-13 20:27:24,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:24,805 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:24,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:24,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1193558822, now seen corresponding path program 64 times [2021-07-13 20:27:24,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:24,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126954966] [2021-07-13 20:27:24,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:25,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:25,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:25,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126954966] [2021-07-13 20:27:25,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126954966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:25,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291310423] [2021-07-13 20:27:25,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:25,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:27:25,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:25,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:27:25,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:25,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:25,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:25,344 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 19 treesize of output 11 [2021-07-13 20:27:25,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:25,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:25,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:25,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:27:25,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:25,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291310423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:25,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:25,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 20:27:25,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603299703] [2021-07-13 20:27:25,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:27:25,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:25,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:27:25,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:27:25,371 INFO L87 Difference]: Start difference. First operand 6597 states and 22546 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:27,239 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-07-13 20:27:28,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:28,250 INFO L93 Difference]: Finished difference Result 8362 states and 28087 transitions. [2021-07-13 20:27:28,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:27:28,250 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:27:28,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:28,266 INFO L225 Difference]: With dead ends: 8362 [2021-07-13 20:27:28,266 INFO L226 Difference]: Without dead ends: 8347 [2021-07-13 20:27:28,267 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 2514.6ms TimeCoverageRelationStatistics Valid=603, Invalid=3303, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:27:28,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8347 states. [2021-07-13 20:27:28,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8347 to 6603. [2021-07-13 20:27:28,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6603 states, 6602 states have (on average 3.4180551348076342) internal successors, (22566), 6602 states have internal predecessors, (22566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:28,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6603 states to 6603 states and 22566 transitions. [2021-07-13 20:27:28,384 INFO L78 Accepts]: Start accepts. Automaton has 6603 states and 22566 transitions. Word has length 30 [2021-07-13 20:27:28,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:28,384 INFO L482 AbstractCegarLoop]: Abstraction has 6603 states and 22566 transitions. [2021-07-13 20:27:28,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:28,384 INFO L276 IsEmpty]: Start isEmpty. Operand 6603 states and 22566 transitions. [2021-07-13 20:27:28,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:27:28,396 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:28,396 INFO L508 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] [2021-07-13 20:27:28,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-07-13 20:27:28,596 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:28,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:28,597 INFO L82 PathProgramCache]: Analyzing trace with hash 611989314, now seen corresponding path program 65 times [2021-07-13 20:27:28,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:28,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929951620] [2021-07-13 20:27:28,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:28,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:28,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:28,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929951620] [2021-07-13 20:27:28,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929951620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:28,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726274268] [2021-07-13 20:27:28,884 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:28,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:27:28,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:28,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:27:28,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:29,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:29,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:29,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:27:29,038 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:27:29,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:29,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:29,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-13 20:27:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:29,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726274268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:29,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:29,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-13 20:27:29,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138551786] [2021-07-13 20:27:29,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:27:29,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:29,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:27:29,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:27:29,110 INFO L87 Difference]: Start difference. First operand 6603 states and 22566 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:33,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:33,031 INFO L93 Difference]: Finished difference Result 9359 states and 31301 transitions. [2021-07-13 20:27:33,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:27:33,032 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:27:33,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:33,052 INFO L225 Difference]: With dead ends: 9359 [2021-07-13 20:27:33,052 INFO L226 Difference]: Without dead ends: 9312 [2021-07-13 20:27:33,052 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2026 ImplicationChecksByTransitivity, 3291.9ms TimeCoverageRelationStatistics Valid=790, Invalid=5372, Unknown=0, NotChecked=0, Total=6162 [2021-07-13 20:27:33,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9312 states. [2021-07-13 20:27:33,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9312 to 6619. [2021-07-13 20:27:33,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6619 states, 6618 states have (on average 3.4177999395587793) internal successors, (22619), 6618 states have internal predecessors, (22619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:33,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6619 states to 6619 states and 22619 transitions. [2021-07-13 20:27:33,195 INFO L78 Accepts]: Start accepts. Automaton has 6619 states and 22619 transitions. Word has length 30 [2021-07-13 20:27:33,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:33,195 INFO L482 AbstractCegarLoop]: Abstraction has 6619 states and 22619 transitions. [2021-07-13 20:27:33,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:33,196 INFO L276 IsEmpty]: Start isEmpty. Operand 6619 states and 22619 transitions. [2021-07-13 20:27:33,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:27:33,206 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:33,206 INFO L508 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] [2021-07-13 20:27:33,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-07-13 20:27:33,407 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:33,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:33,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1029376390, now seen corresponding path program 66 times [2021-07-13 20:27:33,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:33,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163679897] [2021-07-13 20:27:33,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:33,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:33,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163679897] [2021-07-13 20:27:33,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163679897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:33,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647215008] [2021-07-13 20:27:33,706 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:33,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:27:33,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:33,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:27:33,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:33,919 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:33,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-07-13 20:27:33,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:27:33,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:33,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:33,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:125 [2021-07-13 20:27:34,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:34,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647215008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:34,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:34,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-13 20:27:34,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900016806] [2021-07-13 20:27:34,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:27:34,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:34,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:27:34,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:27:34,124 INFO L87 Difference]: Start difference. First operand 6619 states and 22619 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:36,483 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-07-13 20:27:36,852 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-07-13 20:27:39,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:39,392 INFO L93 Difference]: Finished difference Result 9450 states and 31390 transitions. [2021-07-13 20:27:39,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-13 20:27:39,393 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:27:39,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:39,413 INFO L225 Difference]: With dead ends: 9450 [2021-07-13 20:27:39,413 INFO L226 Difference]: Without dead ends: 9389 [2021-07-13 20:27:39,414 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 4330.5ms TimeCoverageRelationStatistics Valid=875, Invalid=6607, Unknown=0, NotChecked=0, Total=7482 [2021-07-13 20:27:39,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9389 states. [2021-07-13 20:27:39,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9389 to 6626. [2021-07-13 20:27:39,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6626 states, 6625 states have (on average 3.4176603773584904) internal successors, (22642), 6625 states have internal predecessors, (22642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:39,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6626 states to 6626 states and 22642 transitions. [2021-07-13 20:27:39,551 INFO L78 Accepts]: Start accepts. Automaton has 6626 states and 22642 transitions. Word has length 30 [2021-07-13 20:27:39,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:39,551 INFO L482 AbstractCegarLoop]: Abstraction has 6626 states and 22642 transitions. [2021-07-13 20:27:39,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:39,551 INFO L276 IsEmpty]: Start isEmpty. Operand 6626 states and 22642 transitions. [2021-07-13 20:27:39,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:27:39,561 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:39,561 INFO L508 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] [2021-07-13 20:27:39,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:39,762 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:39,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:39,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1086081622, now seen corresponding path program 67 times [2021-07-13 20:27:39,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:39,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807196826] [2021-07-13 20:27:39,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:40,065 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:40,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:40,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807196826] [2021-07-13 20:27:40,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807196826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:40,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265425164] [2021-07-13 20:27:40,065 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:40,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:40,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:27:40,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:40,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:40,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:40,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:40,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:40,260 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:40,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2021-07-13 20:27:40,261 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:27:40,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:40,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:40,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:28 [2021-07-13 20:27:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:40,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265425164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:40,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:40,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-13 20:27:40,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337976081] [2021-07-13 20:27:40,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:27:40,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:40,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:27:40,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:27:40,342 INFO L87 Difference]: Start difference. First operand 6626 states and 22642 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:42,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:42,158 INFO L93 Difference]: Finished difference Result 8651 states and 29045 transitions. [2021-07-13 20:27:42,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:27:42,158 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:27:42,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:42,176 INFO L225 Difference]: With dead ends: 8651 [2021-07-13 20:27:42,176 INFO L226 Difference]: Without dead ends: 8626 [2021-07-13 20:27:42,176 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1291.9ms TimeCoverageRelationStatistics Valid=301, Invalid=1861, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:27:42,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8626 states. [2021-07-13 20:27:42,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8626 to 6640. [2021-07-13 20:27:42,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6640 states, 6639 states have (on average 3.4181352613345384) internal successors, (22693), 6639 states have internal predecessors, (22693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:42,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6640 states to 6640 states and 22693 transitions. [2021-07-13 20:27:42,328 INFO L78 Accepts]: Start accepts. Automaton has 6640 states and 22693 transitions. Word has length 30 [2021-07-13 20:27:42,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:42,328 INFO L482 AbstractCegarLoop]: Abstraction has 6640 states and 22693 transitions. [2021-07-13 20:27:42,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:42,328 INFO L276 IsEmpty]: Start isEmpty. Operand 6640 states and 22693 transitions. [2021-07-13 20:27:42,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:27:42,338 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:42,338 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:42,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:42,539 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:42,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:42,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1576250863, now seen corresponding path program 31 times [2021-07-13 20:27:42,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:42,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601587125] [2021-07-13 20:27:42,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:42,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:42,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601587125] [2021-07-13 20:27:42,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601587125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:42,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641977347] [2021-07-13 20:27:42,963 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:42,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:27:42,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:43,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:43,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:43,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:43,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:43,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-13 20:27:43,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:43,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:43,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:43,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:27:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:43,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641977347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:43,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:43,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-07-13 20:27:43,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841712373] [2021-07-13 20:27:43,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:27:43,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:43,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:27:43,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:27:43,205 INFO L87 Difference]: Start difference. First operand 6640 states and 22693 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:46,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:46,853 INFO L93 Difference]: Finished difference Result 8380 states and 27963 transitions. [2021-07-13 20:27:46,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-13 20:27:46,853 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:27:46,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:46,872 INFO L225 Difference]: With dead ends: 8380 [2021-07-13 20:27:46,872 INFO L226 Difference]: Without dead ends: 8358 [2021-07-13 20:27:46,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2273 ImplicationChecksByTransitivity, 3140.9ms TimeCoverageRelationStatistics Valid=897, Invalid=5909, Unknown=0, NotChecked=0, Total=6806 [2021-07-13 20:27:46,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8358 states. [2021-07-13 20:27:46,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8358 to 6638. [2021-07-13 20:27:46,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6638 states, 6637 states have (on average 3.418411933102305) internal successors, (22688), 6637 states have internal predecessors, (22688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:46,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6638 states to 6638 states and 22688 transitions. [2021-07-13 20:27:46,998 INFO L78 Accepts]: Start accepts. Automaton has 6638 states and 22688 transitions. Word has length 30 [2021-07-13 20:27:46,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:46,998 INFO L482 AbstractCegarLoop]: Abstraction has 6638 states and 22688 transitions. [2021-07-13 20:27:46,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:46,998 INFO L276 IsEmpty]: Start isEmpty. Operand 6638 states and 22688 transitions. [2021-07-13 20:27:47,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:27:47,049 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:47,049 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:47,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable339 [2021-07-13 20:27:47,250 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:47,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:47,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1302931307, now seen corresponding path program 32 times [2021-07-13 20:27:47,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:47,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758786276] [2021-07-13 20:27:47,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:47,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:47,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:47,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758786276] [2021-07-13 20:27:47,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758786276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:47,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738930528] [2021-07-13 20:27:47,598 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:47,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:27:47,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:47,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:27:47,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:47,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:47,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:47,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 47 [2021-07-13 20:27:47,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:27:47,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:47,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:47,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:20 [2021-07-13 20:27:48,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:48,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738930528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:48,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:48,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:27:48,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052325378] [2021-07-13 20:27:48,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:27:48,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:48,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:27:48,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:27:48,009 INFO L87 Difference]: Start difference. First operand 6638 states and 22688 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:50,333 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-07-13 20:27:51,046 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-07-13 20:27:54,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:54,565 INFO L93 Difference]: Finished difference Result 10721 states and 35147 transitions. [2021-07-13 20:27:54,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-13 20:27:54,565 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:27:54,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:54,585 INFO L225 Difference]: With dead ends: 10721 [2021-07-13 20:27:54,586 INFO L226 Difference]: Without dead ends: 10673 [2021-07-13 20:27:54,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3739 ImplicationChecksByTransitivity, 5497.8ms TimeCoverageRelationStatistics Valid=1470, Invalid=10740, Unknown=0, NotChecked=0, Total=12210 [2021-07-13 20:27:54,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10673 states. [2021-07-13 20:27:54,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10673 to 6649. [2021-07-13 20:27:54,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6649 states, 6648 states have (on average 3.417870036101083) internal successors, (22722), 6648 states have internal predecessors, (22722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:54,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6649 states to 6649 states and 22722 transitions. [2021-07-13 20:27:54,730 INFO L78 Accepts]: Start accepts. Automaton has 6649 states and 22722 transitions. Word has length 30 [2021-07-13 20:27:54,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:54,730 INFO L482 AbstractCegarLoop]: Abstraction has 6649 states and 22722 transitions. [2021-07-13 20:27:54,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:54,731 INFO L276 IsEmpty]: Start isEmpty. Operand 6649 states and 22722 transitions. [2021-07-13 20:27:54,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:27:54,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:54,740 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:54,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:54,941 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:54,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:54,941 INFO L82 PathProgramCache]: Analyzing trace with hash 276275861, now seen corresponding path program 33 times [2021-07-13 20:27:54,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:54,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831193589] [2021-07-13 20:27:54,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:54,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:55,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:55,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831193589] [2021-07-13 20:27:55,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831193589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:55,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782716059] [2021-07-13 20:27:55,342 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:55,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:27:55,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:55,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:27:55,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:55,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:55,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:55,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 47 [2021-07-13 20:27:55,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 20:27:55,665 INFO L628 ElimStorePlain]: treesize reduction 45, result has 28.6 percent of original size [2021-07-13 20:27:55,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:55,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:18 [2021-07-13 20:27:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:55,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782716059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:55,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:55,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-07-13 20:27:55,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785145366] [2021-07-13 20:27:55,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:27:55,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:55,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:27:55,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:27:55,794 INFO L87 Difference]: Start difference. First operand 6649 states and 22722 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:57,535 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-07-13 20:27:59,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:59,238 INFO L93 Difference]: Finished difference Result 10431 states and 34548 transitions. [2021-07-13 20:27:59,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:27:59,238 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:27:59,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:59,259 INFO L225 Difference]: With dead ends: 10431 [2021-07-13 20:27:59,259 INFO L226 Difference]: Without dead ends: 10368 [2021-07-13 20:27:59,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 3111.9ms TimeCoverageRelationStatistics Valid=877, Invalid=5129, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:27:59,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10368 states. [2021-07-13 20:27:59,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10368 to 6656. [2021-07-13 20:27:59,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6656 states, 6655 states have (on average 3.417129977460556) internal successors, (22741), 6655 states have internal predecessors, (22741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:59,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6656 states to 6656 states and 22741 transitions. [2021-07-13 20:27:59,399 INFO L78 Accepts]: Start accepts. Automaton has 6656 states and 22741 transitions. Word has length 30 [2021-07-13 20:27:59,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:59,399 INFO L482 AbstractCegarLoop]: Abstraction has 6656 states and 22741 transitions. [2021-07-13 20:27:59,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:59,399 INFO L276 IsEmpty]: Start isEmpty. Operand 6656 states and 22741 transitions. [2021-07-13 20:27:59,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:27:59,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:59,409 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:59,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:59,610 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:59,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:59,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1350859047, now seen corresponding path program 34 times [2021-07-13 20:27:59,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:59,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309872388] [2021-07-13 20:27:59,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:00,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:00,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309872388] [2021-07-13 20:28:00,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309872388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:00,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031333690] [2021-07-13 20:28:00,033 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:00,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:28:00,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:00,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:28:00,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:00,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:00,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:00,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:00,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:00,220 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 23 treesize of output 41 [2021-07-13 20:28:00,239 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:28:00,258 INFO L628 ElimStorePlain]: treesize reduction 15, result has 54.5 percent of original size [2021-07-13 20:28:00,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:00,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:28 [2021-07-13 20:28:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:00,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031333690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:00,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:00,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-07-13 20:28:00,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262050191] [2021-07-13 20:28:00,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:28:00,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:00,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:28:00,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:28:00,344 INFO L87 Difference]: Start difference. First operand 6656 states and 22741 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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) [2021-07-13 20:28:02,359 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-07-13 20:28:03,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:03,242 INFO L93 Difference]: Finished difference Result 10017 states and 33312 transitions. [2021-07-13 20:28:03,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:28:03,242 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:28:03,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:03,263 INFO L225 Difference]: With dead ends: 10017 [2021-07-13 20:28:03,264 INFO L226 Difference]: Without dead ends: 9945 [2021-07-13 20:28:03,264 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 2585.6ms TimeCoverageRelationStatistics Valid=723, Invalid=4107, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:28:03,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9945 states. [2021-07-13 20:28:03,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9945 to 6722. [2021-07-13 20:28:03,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6722 states, 6721 states have (on average 3.41809254575212) internal successors, (22973), 6721 states have internal predecessors, (22973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:03,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6722 states to 6722 states and 22973 transitions. [2021-07-13 20:28:03,411 INFO L78 Accepts]: Start accepts. Automaton has 6722 states and 22973 transitions. Word has length 30 [2021-07-13 20:28:03,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:03,411 INFO L482 AbstractCegarLoop]: Abstraction has 6722 states and 22973 transitions. [2021-07-13 20:28:03,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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) [2021-07-13 20:28:03,411 INFO L276 IsEmpty]: Start isEmpty. Operand 6722 states and 22973 transitions. [2021-07-13 20:28:03,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:28:03,422 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:03,422 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:03,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-07-13 20:28:03,622 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:03,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:03,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1666655007, now seen corresponding path program 35 times [2021-07-13 20:28:03,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:03,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278654634] [2021-07-13 20:28:03,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:04,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:04,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:04,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278654634] [2021-07-13 20:28:04,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278654634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:04,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903514973] [2021-07-13 20:28:04,057 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:04,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:28:04,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:04,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:28:04,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:04,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:04,356 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-07-13 20:28:04,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 50 [2021-07-13 20:28:04,358 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:04,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:04,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:04,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:3 [2021-07-13 20:28:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:04,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903514973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:04,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:04,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-07-13 20:28:04,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424082587] [2021-07-13 20:28:04,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:28:04,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:04,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:28:04,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:28:04,383 INFO L87 Difference]: Start difference. First operand 6722 states and 22973 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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) [2021-07-13 20:28:09,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:09,731 INFO L93 Difference]: Finished difference Result 8927 states and 29552 transitions. [2021-07-13 20:28:09,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-13 20:28:09,732 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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 30 [2021-07-13 20:28:09,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:09,750 INFO L225 Difference]: With dead ends: 8927 [2021-07-13 20:28:09,750 INFO L226 Difference]: Without dead ends: 8898 [2021-07-13 20:28:09,751 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3089 ImplicationChecksByTransitivity, 4383.4ms TimeCoverageRelationStatistics Valid=1157, Invalid=8743, Unknown=0, NotChecked=0, Total=9900 [2021-07-13 20:28:09,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8898 states. [2021-07-13 20:28:09,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8898 to 6748. [2021-07-13 20:28:09,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6748 states, 6747 states have (on average 3.4179635393508225) internal successors, (23061), 6747 states have internal predecessors, (23061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:09,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6748 states to 6748 states and 23061 transitions. [2021-07-13 20:28:09,873 INFO L78 Accepts]: Start accepts. Automaton has 6748 states and 23061 transitions. Word has length 30 [2021-07-13 20:28:09,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:09,873 INFO L482 AbstractCegarLoop]: Abstraction has 6748 states and 23061 transitions. [2021-07-13 20:28:09,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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) [2021-07-13 20:28:09,873 INFO L276 IsEmpty]: Start isEmpty. Operand 6748 states and 23061 transitions. [2021-07-13 20:28:09,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:28:09,883 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:09,883 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:10,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-07-13 20:28:10,084 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:10,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:10,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1871803969, now seen corresponding path program 36 times [2021-07-13 20:28:10,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:10,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769734587] [2021-07-13 20:28:10,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:10,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:10,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:10,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:10,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769734587] [2021-07-13 20:28:10,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769734587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:10,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929991336] [2021-07-13 20:28:10,495 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:10,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:28:10,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:10,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:28:10,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:10,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:10,776 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:10,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 43 [2021-07-13 20:28:10,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 20:28:10,811 INFO L628 ElimStorePlain]: treesize reduction 100, result has 16.7 percent of original size [2021-07-13 20:28:10,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:10,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:20 [2021-07-13 20:28:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:10,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929991336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:10,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:10,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:28:10,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519710407] [2021-07-13 20:28:10,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:28:10,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:10,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:28:10,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:28:10,915 INFO L87 Difference]: Start difference. First operand 6748 states and 23061 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:14,304 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-07-13 20:28:17,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:17,913 INFO L93 Difference]: Finished difference Result 11440 states and 37396 transitions. [2021-07-13 20:28:17,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-07-13 20:28:17,913 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:28:17,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:17,938 INFO L225 Difference]: With dead ends: 11440 [2021-07-13 20:28:17,938 INFO L226 Difference]: Without dead ends: 11377 [2021-07-13 20:28:17,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4941 ImplicationChecksByTransitivity, 5820.0ms TimeCoverageRelationStatistics Valid=1803, Invalid=13203, Unknown=0, NotChecked=0, Total=15006 [2021-07-13 20:28:17,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11377 states. [2021-07-13 20:28:18,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11377 to 6877. [2021-07-13 20:28:18,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6877 states, 6876 states have (on average 3.4157940663176265) internal successors, (23487), 6876 states have internal predecessors, (23487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:18,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6877 states to 6877 states and 23487 transitions. [2021-07-13 20:28:18,141 INFO L78 Accepts]: Start accepts. Automaton has 6877 states and 23487 transitions. Word has length 30 [2021-07-13 20:28:18,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:18,141 INFO L482 AbstractCegarLoop]: Abstraction has 6877 states and 23487 transitions. [2021-07-13 20:28:18,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:18,141 INFO L276 IsEmpty]: Start isEmpty. Operand 6877 states and 23487 transitions. [2021-07-13 20:28:18,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:28:18,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:18,153 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:18,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-07-13 20:28:18,354 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:18,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:18,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1119954797, now seen corresponding path program 37 times [2021-07-13 20:28:18,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:18,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764575745] [2021-07-13 20:28:18,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:18,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:18,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764575745] [2021-07-13 20:28:18,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764575745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:18,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588745218] [2021-07-13 20:28:18,808 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:18,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:28:18,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:19,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:19,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:19,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:28:19,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:28:19,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-13 20:28:19,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:19,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:19,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:19,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:13 [2021-07-13 20:28:19,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:19,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588745218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:19,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:19,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-07-13 20:28:19,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494599411] [2021-07-13 20:28:19,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:28:19,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:19,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:28:19,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:28:19,161 INFO L87 Difference]: Start difference. First operand 6877 states and 23487 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 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) [2021-07-13 20:28:23,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:23,888 INFO L93 Difference]: Finished difference Result 8722 states and 29097 transitions. [2021-07-13 20:28:23,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:28:23,888 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 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 30 [2021-07-13 20:28:23,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:23,904 INFO L225 Difference]: With dead ends: 8722 [2021-07-13 20:28:23,904 INFO L226 Difference]: Without dead ends: 8696 [2021-07-13 20:28:23,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2409 ImplicationChecksByTransitivity, 4281.6ms TimeCoverageRelationStatistics Valid=874, Invalid=6608, Unknown=0, NotChecked=0, Total=7482 [2021-07-13 20:28:23,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8696 states. [2021-07-13 20:28:24,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8696 to 6874. [2021-07-13 20:28:24,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6874 states, 6873 states have (on average 3.4156845627819004) internal successors, (23476), 6873 states have internal predecessors, (23476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:24,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6874 states to 6874 states and 23476 transitions. [2021-07-13 20:28:24,025 INFO L78 Accepts]: Start accepts. Automaton has 6874 states and 23476 transitions. Word has length 30 [2021-07-13 20:28:24,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:24,025 INFO L482 AbstractCegarLoop]: Abstraction has 6874 states and 23476 transitions. [2021-07-13 20:28:24,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 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) [2021-07-13 20:28:24,025 INFO L276 IsEmpty]: Start isEmpty. Operand 6874 states and 23476 transitions. [2021-07-13 20:28:24,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:28:24,036 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:24,036 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:24,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:24,237 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:24,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:24,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1353770535, now seen corresponding path program 38 times [2021-07-13 20:28:24,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:24,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872240710] [2021-07-13 20:28:24,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:24,648 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:24,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:24,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872240710] [2021-07-13 20:28:24,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872240710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:24,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487661697] [2021-07-13 20:28:24,649 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:24,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:28:24,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:24,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:28:24,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:24,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:24,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:24,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:28:24,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:28:24,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-13 20:28:24,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:24,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:24,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:24,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:28:24,880 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:24,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487661697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:24,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:24,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-07-13 20:28:24,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289562732] [2021-07-13 20:28:24,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:28:24,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:24,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:28:24,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:28:24,881 INFO L87 Difference]: Start difference. First operand 6874 states and 23476 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:27,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:27,088 INFO L93 Difference]: Finished difference Result 8472 states and 28350 transitions. [2021-07-13 20:28:27,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:28:27,088 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:28:27,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:27,105 INFO L225 Difference]: With dead ends: 8472 [2021-07-13 20:28:27,106 INFO L226 Difference]: Without dead ends: 8446 [2021-07-13 20:28:27,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 1988.3ms TimeCoverageRelationStatistics Valid=445, Invalid=2861, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:28:27,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8446 states. [2021-07-13 20:28:27,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8446 to 6874. [2021-07-13 20:28:27,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6874 states, 6873 states have (on average 3.4156845627819004) internal successors, (23476), 6873 states have internal predecessors, (23476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:27,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6874 states to 6874 states and 23476 transitions. [2021-07-13 20:28:27,229 INFO L78 Accepts]: Start accepts. Automaton has 6874 states and 23476 transitions. Word has length 30 [2021-07-13 20:28:27,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:27,230 INFO L482 AbstractCegarLoop]: Abstraction has 6874 states and 23476 transitions. [2021-07-13 20:28:27,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:27,230 INFO L276 IsEmpty]: Start isEmpty. Operand 6874 states and 23476 transitions. [2021-07-13 20:28:27,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:28:27,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:27,241 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:27,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-07-13 20:28:27,442 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:27,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:27,442 INFO L82 PathProgramCache]: Analyzing trace with hash -153504787, now seen corresponding path program 39 times [2021-07-13 20:28:27,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:27,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374236537] [2021-07-13 20:28:27,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:27,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:27,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:27,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:27,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374236537] [2021-07-13 20:28:27,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374236537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:27,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534333439] [2021-07-13 20:28:27,779 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:27,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:28:27,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:27,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:28:27,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:28,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:28,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:28,071 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:28,071 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 21 treesize of output 39 [2021-07-13 20:28:28,078 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:28:28,093 INFO L628 ElimStorePlain]: treesize reduction 19, result has 48.6 percent of original size [2021-07-13 20:28:28,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:28,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-13 20:28:28,142 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:28,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534333439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:28,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:28,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-07-13 20:28:28,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746923958] [2021-07-13 20:28:28,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:28:28,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:28,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:28:28,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:28:28,143 INFO L87 Difference]: Start difference. First operand 6874 states and 23476 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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) [2021-07-13 20:28:30,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:30,580 INFO L93 Difference]: Finished difference Result 9020 states and 29936 transitions. [2021-07-13 20:28:30,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:28:30,580 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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 30 [2021-07-13 20:28:30,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:30,597 INFO L225 Difference]: With dead ends: 9020 [2021-07-13 20:28:30,598 INFO L226 Difference]: Without dead ends: 8964 [2021-07-13 20:28:30,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1909.4ms TimeCoverageRelationStatistics Valid=430, Invalid=3230, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:28:30,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8964 states. [2021-07-13 20:28:30,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8964 to 6858. [2021-07-13 20:28:30,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6858 states, 6857 states have (on average 3.41519614991979) internal successors, (23418), 6857 states have internal predecessors, (23418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:30,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6858 states to 6858 states and 23418 transitions. [2021-07-13 20:28:30,720 INFO L78 Accepts]: Start accepts. Automaton has 6858 states and 23418 transitions. Word has length 30 [2021-07-13 20:28:30,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:30,720 INFO L482 AbstractCegarLoop]: Abstraction has 6858 states and 23418 transitions. [2021-07-13 20:28:30,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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) [2021-07-13 20:28:30,721 INFO L276 IsEmpty]: Start isEmpty. Operand 6858 states and 23418 transitions. [2021-07-13 20:28:30,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:28:30,732 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:30,732 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:30,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-07-13 20:28:30,933 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:30,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:30,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1190293913, now seen corresponding path program 40 times [2021-07-13 20:28:30,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:30,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110692] [2021-07-13 20:28:30,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:31,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:31,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:31,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110692] [2021-07-13 20:28:31,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:31,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691081369] [2021-07-13 20:28:31,271 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:31,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:28:31,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:31,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:28:31,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:31,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:31,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:31,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:28:31,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:28:31,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-13 20:28:31,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:31,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:31,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:31,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:13 [2021-07-13 20:28:31,577 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:31,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691081369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:31,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:31,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-07-13 20:28:31,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993149209] [2021-07-13 20:28:31,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:28:31,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:31,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:28:31,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:28:31,578 INFO L87 Difference]: Start difference. First operand 6858 states and 23418 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 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) [2021-07-13 20:28:33,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:33,166 INFO L93 Difference]: Finished difference Result 8455 states and 28275 transitions. [2021-07-13 20:28:33,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:28:33,167 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 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 30 [2021-07-13 20:28:33,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:33,187 INFO L225 Difference]: With dead ends: 8455 [2021-07-13 20:28:33,187 INFO L226 Difference]: Without dead ends: 8440 [2021-07-13 20:28:33,187 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1441.6ms TimeCoverageRelationStatistics Valid=421, Invalid=2549, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:28:33,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8440 states. [2021-07-13 20:28:33,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8440 to 6848. [2021-07-13 20:28:33,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6848 states, 6847 states have (on average 3.416532788082372) internal successors, (23393), 6847 states have internal predecessors, (23393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:33,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6848 states to 6848 states and 23393 transitions. [2021-07-13 20:28:33,355 INFO L78 Accepts]: Start accepts. Automaton has 6848 states and 23393 transitions. Word has length 30 [2021-07-13 20:28:33,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:33,355 INFO L482 AbstractCegarLoop]: Abstraction has 6848 states and 23393 transitions. [2021-07-13 20:28:33,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 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) [2021-07-13 20:28:33,355 INFO L276 IsEmpty]: Start isEmpty. Operand 6848 states and 23393 transitions. [2021-07-13 20:28:33,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:28:33,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:33,367 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:33,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:33,568 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:33,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:33,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1093552081, now seen corresponding path program 41 times [2021-07-13 20:28:33,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:33,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455559203] [2021-07-13 20:28:33,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:33,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:34,017 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:34,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:34,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455559203] [2021-07-13 20:28:34,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455559203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:34,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700573903] [2021-07-13 20:28:34,018 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:34,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:28:34,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:34,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:28:34,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:34,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:34,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:34,238 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:34,238 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 21 treesize of output 39 [2021-07-13 20:28:34,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 20:28:34,268 INFO L628 ElimStorePlain]: treesize reduction 26, result has 40.9 percent of original size [2021-07-13 20:28:34,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:34,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:28 [2021-07-13 20:28:34,347 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:34,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700573903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:34,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:34,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:28:34,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011594143] [2021-07-13 20:28:34,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:28:34,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:34,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:28:34,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:28:34,348 INFO L87 Difference]: Start difference. First operand 6848 states and 23393 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2021-07-13 20:28:36,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:36,392 INFO L93 Difference]: Finished difference Result 8682 states and 29011 transitions. [2021-07-13 20:28:36,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:28:36,392 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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 30 [2021-07-13 20:28:36,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:36,410 INFO L225 Difference]: With dead ends: 8682 [2021-07-13 20:28:36,410 INFO L226 Difference]: Without dead ends: 8637 [2021-07-13 20:28:36,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1714.6ms TimeCoverageRelationStatistics Valid=350, Invalid=2620, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:28:36,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8637 states. [2021-07-13 20:28:36,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8637 to 6836. [2021-07-13 20:28:36,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6836 states, 6835 states have (on average 3.417556693489393) internal successors, (23359), 6835 states have internal predecessors, (23359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:36,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6836 states to 6836 states and 23359 transitions. [2021-07-13 20:28:36,542 INFO L78 Accepts]: Start accepts. Automaton has 6836 states and 23359 transitions. Word has length 30 [2021-07-13 20:28:36,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:36,542 INFO L482 AbstractCegarLoop]: Abstraction has 6836 states and 23359 transitions. [2021-07-13 20:28:36,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2021-07-13 20:28:36,542 INFO L276 IsEmpty]: Start isEmpty. Operand 6836 states and 23359 transitions. [2021-07-13 20:28:36,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:28:36,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:36,553 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:36,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:36,754 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:36,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:36,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1107184069, now seen corresponding path program 42 times [2021-07-13 20:28:36,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:36,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926057649] [2021-07-13 20:28:36,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:36,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:37,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:37,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926057649] [2021-07-13 20:28:37,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926057649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:37,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119331691] [2021-07-13 20:28:37,175 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:37,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:28:37,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:37,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:28:37,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:37,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:37,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:37,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:28:37,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:28:37,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-13 20:28:37,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:37,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:37,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:37,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:28:37,561 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:37,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119331691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:37,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:37,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-07-13 20:28:37,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801427328] [2021-07-13 20:28:37,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:28:37,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:37,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:28:37,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:28:37,582 INFO L87 Difference]: Start difference. First operand 6836 states and 23359 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:39,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:39,377 INFO L93 Difference]: Finished difference Result 8350 states and 28001 transitions. [2021-07-13 20:28:39,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:28:39,377 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:28:39,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:39,400 INFO L225 Difference]: With dead ends: 8350 [2021-07-13 20:28:39,400 INFO L226 Difference]: Without dead ends: 8335 [2021-07-13 20:28:39,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1619.4ms TimeCoverageRelationStatistics Valid=412, Invalid=2450, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:28:39,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8335 states. [2021-07-13 20:28:39,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8335 to 6836. [2021-07-13 20:28:39,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6836 states, 6835 states have (on average 3.417556693489393) internal successors, (23359), 6835 states have internal predecessors, (23359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:39,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6836 states to 6836 states and 23359 transitions. [2021-07-13 20:28:39,571 INFO L78 Accepts]: Start accepts. Automaton has 6836 states and 23359 transitions. Word has length 30 [2021-07-13 20:28:39,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:39,571 INFO L482 AbstractCegarLoop]: Abstraction has 6836 states and 23359 transitions. [2021-07-13 20:28:39,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:39,571 INFO L276 IsEmpty]: Start isEmpty. Operand 6836 states and 23359 transitions. [2021-07-13 20:28:39,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:28:39,586 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:39,586 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:39,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-07-13 20:28:39,809 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:39,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:39,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1610082335, now seen corresponding path program 43 times [2021-07-13 20:28:39,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:39,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210691061] [2021-07-13 20:28:39,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:39,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:40,479 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:40,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:40,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210691061] [2021-07-13 20:28:40,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210691061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:40,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616377368] [2021-07-13 20:28:40,480 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:40,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:28:40,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:40,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:40,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:40,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:28:40,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:28:40,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-13 20:28:40,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:40,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:40,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:40,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:28:40,777 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:40,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616377368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:40,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:40,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-07-13 20:28:40,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582276854] [2021-07-13 20:28:40,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:28:40,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:40,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:28:40,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:28:40,778 INFO L87 Difference]: Start difference. First operand 6836 states and 23359 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:41,074 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-07-13 20:28:41,745 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-07-13 20:28:42,861 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-07-13 20:28:46,467 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-07-13 20:28:46,794 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-07-13 20:28:47,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:47,306 INFO L93 Difference]: Finished difference Result 10075 states and 32916 transitions. [2021-07-13 20:28:47,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-13 20:28:47,306 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:28:47,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:47,332 INFO L225 Difference]: With dead ends: 10075 [2021-07-13 20:28:47,332 INFO L226 Difference]: Without dead ends: 10049 [2021-07-13 20:28:47,333 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3614 ImplicationChecksByTransitivity, 5768.3ms TimeCoverageRelationStatistics Valid=1570, Invalid=8330, Unknown=0, NotChecked=0, Total=9900 [2021-07-13 20:28:47,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10049 states. [2021-07-13 20:28:47,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10049 to 6864. [2021-07-13 20:28:47,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6864 states, 6863 states have (on average 3.420370100539123) internal successors, (23474), 6863 states have internal predecessors, (23474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:47,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6864 states to 6864 states and 23474 transitions. [2021-07-13 20:28:47,549 INFO L78 Accepts]: Start accepts. Automaton has 6864 states and 23474 transitions. Word has length 30 [2021-07-13 20:28:47,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:47,549 INFO L482 AbstractCegarLoop]: Abstraction has 6864 states and 23474 transitions. [2021-07-13 20:28:47,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:47,549 INFO L276 IsEmpty]: Start isEmpty. Operand 6864 states and 23474 transitions. [2021-07-13 20:28:47,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:28:47,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:47,560 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:47,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:47,761 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:47,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:47,761 INFO L82 PathProgramCache]: Analyzing trace with hash 2098603023, now seen corresponding path program 44 times [2021-07-13 20:28:47,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:47,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905459221] [2021-07-13 20:28:47,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:48,057 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:48,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:48,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905459221] [2021-07-13 20:28:48,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905459221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:48,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727009003] [2021-07-13 20:28:48,058 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:48,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:28:48,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:48,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:28:48,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:48,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:28:48,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:48,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:48,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:28:48,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 20:28:48,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:48,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:48,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:48,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:3 [2021-07-13 20:28:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:48,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727009003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:48,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:48,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-07-13 20:28:48,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630501926] [2021-07-13 20:28:48,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:28:48,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:48,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:28:48,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:28:48,383 INFO L87 Difference]: Start difference. First operand 6864 states and 23474 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:50,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:50,811 INFO L93 Difference]: Finished difference Result 11521 states and 37730 transitions. [2021-07-13 20:28:50,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:28:50,811 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:28:50,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:50,836 INFO L225 Difference]: With dead ends: 11521 [2021-07-13 20:28:50,836 INFO L226 Difference]: Without dead ends: 11500 [2021-07-13 20:28:50,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 1845.2ms TimeCoverageRelationStatistics Valid=665, Invalid=4447, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:28:50,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11500 states. [2021-07-13 20:28:50,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11500 to 6890. [2021-07-13 20:28:50,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6890 states, 6889 states have (on average 3.4235738133255915) internal successors, (23585), 6889 states have internal predecessors, (23585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:51,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6890 states to 6890 states and 23585 transitions. [2021-07-13 20:28:51,017 INFO L78 Accepts]: Start accepts. Automaton has 6890 states and 23585 transitions. Word has length 30 [2021-07-13 20:28:51,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:51,017 INFO L482 AbstractCegarLoop]: Abstraction has 6890 states and 23585 transitions. [2021-07-13 20:28:51,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:51,017 INFO L276 IsEmpty]: Start isEmpty. Operand 6890 states and 23585 transitions. [2021-07-13 20:28:51,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:28:51,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:51,029 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:51,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:51,229 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:51,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:51,230 INFO L82 PathProgramCache]: Analyzing trace with hash 2044173309, now seen corresponding path program 45 times [2021-07-13 20:28:51,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:51,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329737883] [2021-07-13 20:28:51,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:51,541 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:51,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:51,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329737883] [2021-07-13 20:28:51,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329737883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:51,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24055081] [2021-07-13 20:28:51,541 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:51,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:28:51,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:51,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:28:51,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:51,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:51,776 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-07-13 20:28:51,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 70 treesize of output 68 [2021-07-13 20:28:51,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:51,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:51,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:51,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:73, output treesize:15 [2021-07-13 20:28:51,833 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:51,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24055081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:51,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:51,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-07-13 20:28:51,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295914616] [2021-07-13 20:28:51,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:28:51,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:51,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:28:51,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:28:51,834 INFO L87 Difference]: Start difference. First operand 6890 states and 23585 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2021-07-13 20:28:53,258 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-07-13 20:28:53,540 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-07-13 20:28:57,132 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-07-13 20:28:57,361 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-07-13 20:28:57,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:57,856 INFO L93 Difference]: Finished difference Result 11048 states and 36381 transitions. [2021-07-13 20:28:57,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-07-13 20:28:57,857 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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 30 [2021-07-13 20:28:57,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:57,877 INFO L225 Difference]: With dead ends: 11048 [2021-07-13 20:28:57,878 INFO L226 Difference]: Without dead ends: 10971 [2021-07-13 20:28:57,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3768 ImplicationChecksByTransitivity, 4563.6ms TimeCoverageRelationStatistics Valid=1535, Invalid=9385, Unknown=0, NotChecked=0, Total=10920 [2021-07-13 20:28:57,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10971 states. [2021-07-13 20:28:58,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10971 to 7036. [2021-07-13 20:28:58,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7036 states, 7035 states have (on average 3.4169154228855723) internal successors, (24038), 7035 states have internal predecessors, (24038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:58,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7036 states to 7036 states and 24038 transitions. [2021-07-13 20:28:58,049 INFO L78 Accepts]: Start accepts. Automaton has 7036 states and 24038 transitions. Word has length 30 [2021-07-13 20:28:58,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:58,049 INFO L482 AbstractCegarLoop]: Abstraction has 7036 states and 24038 transitions. [2021-07-13 20:28:58,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2021-07-13 20:28:58,049 INFO L276 IsEmpty]: Start isEmpty. Operand 7036 states and 24038 transitions. [2021-07-13 20:28:58,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:28:58,060 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:58,060 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:58,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-07-13 20:28:58,261 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:58,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:58,261 INFO L82 PathProgramCache]: Analyzing trace with hash -2029573961, now seen corresponding path program 46 times [2021-07-13 20:28:58,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:58,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202204133] [2021-07-13 20:28:58,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:58,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:58,691 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:58,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:58,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202204133] [2021-07-13 20:28:58,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202204133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:58,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568285129] [2021-07-13 20:28:58,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:58,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:28:58,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:58,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:28:58,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:58,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:58,987 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-07-13 20:28:58,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 86 treesize of output 58 [2021-07-13 20:28:58,989 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:58,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:58,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:58,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:89, output treesize:13 [2021-07-13 20:28:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:59,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568285129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:59,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:59,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-07-13 20:28:59,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138253035] [2021-07-13 20:28:59,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:28:59,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:59,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:28:59,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:28:59,053 INFO L87 Difference]: Start difference. First operand 7036 states and 24038 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 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) [2021-07-13 20:29:00,178 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-07-13 20:29:02,214 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-07-13 20:29:02,430 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-07-13 20:29:02,990 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-07-13 20:29:04,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:04,358 INFO L93 Difference]: Finished difference Result 9538 states and 31634 transitions. [2021-07-13 20:29:04,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:29:04,359 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 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 30 [2021-07-13 20:29:04,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:04,379 INFO L225 Difference]: With dead ends: 9538 [2021-07-13 20:29:04,379 INFO L226 Difference]: Without dead ends: 9523 [2021-07-13 20:29:04,380 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2396 ImplicationChecksByTransitivity, 4636.3ms TimeCoverageRelationStatistics Valid=981, Invalid=6675, Unknown=0, NotChecked=0, Total=7656 [2021-07-13 20:29:04,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9523 states. [2021-07-13 20:29:04,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9523 to 7037. [2021-07-13 20:29:04,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7037 states, 7036 states have (on average 3.417140420693576) internal successors, (24043), 7036 states have internal predecessors, (24043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:04,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7037 states to 7037 states and 24043 transitions. [2021-07-13 20:29:04,517 INFO L78 Accepts]: Start accepts. Automaton has 7037 states and 24043 transitions. Word has length 30 [2021-07-13 20:29:04,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:04,517 INFO L482 AbstractCegarLoop]: Abstraction has 7037 states and 24043 transitions. [2021-07-13 20:29:04,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 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) [2021-07-13 20:29:04,517 INFO L276 IsEmpty]: Start isEmpty. Operand 7037 states and 24043 transitions. [2021-07-13 20:29:04,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:29:04,528 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:04,528 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:04,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-07-13 20:29:04,729 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:04,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:04,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1541053273, now seen corresponding path program 47 times [2021-07-13 20:29:04,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:04,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215460118] [2021-07-13 20:29:04,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:04,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:05,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:05,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:05,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215460118] [2021-07-13 20:29:05,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215460118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:05,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352471260] [2021-07-13 20:29:05,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:05,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:29:05,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:05,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:29:05,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:05,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:05,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:05,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:05,291 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 21 treesize of output 37 [2021-07-13 20:29:05,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:29:05,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:05,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:05,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:15 [2021-07-13 20:29:05,347 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:05,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352471260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:05,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:05,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-07-13 20:29:05,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961373433] [2021-07-13 20:29:05,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:29:05,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:05,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:29:05,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:29:05,348 INFO L87 Difference]: Start difference. First operand 7037 states and 24043 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2021-07-13 20:29:11,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:11,187 INFO L93 Difference]: Finished difference Result 12819 states and 41403 transitions. [2021-07-13 20:29:11,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-07-13 20:29:11,187 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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 30 [2021-07-13 20:29:11,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:11,219 INFO L225 Difference]: With dead ends: 12819 [2021-07-13 20:29:11,219 INFO L226 Difference]: Without dead ends: 12789 [2021-07-13 20:29:11,220 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4395 ImplicationChecksByTransitivity, 4805.3ms TimeCoverageRelationStatistics Valid=1803, Invalid=10853, Unknown=0, NotChecked=0, Total=12656 [2021-07-13 20:29:11,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12789 states. [2021-07-13 20:29:11,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12789 to 7083. [2021-07-13 20:29:11,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7083 states, 7082 states have (on average 3.415419373058458) internal successors, (24188), 7082 states have internal predecessors, (24188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:11,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7083 states to 7083 states and 24188 transitions. [2021-07-13 20:29:11,423 INFO L78 Accepts]: Start accepts. Automaton has 7083 states and 24188 transitions. Word has length 30 [2021-07-13 20:29:11,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:11,423 INFO L482 AbstractCegarLoop]: Abstraction has 7083 states and 24188 transitions. [2021-07-13 20:29:11,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2021-07-13 20:29:11,423 INFO L276 IsEmpty]: Start isEmpty. Operand 7083 states and 24188 transitions. [2021-07-13 20:29:11,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:29:11,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:11,434 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:11,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-07-13 20:29:11,635 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:11,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:11,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1282297551, now seen corresponding path program 48 times [2021-07-13 20:29:11,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:11,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939313429] [2021-07-13 20:29:11,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:11,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:12,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:12,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939313429] [2021-07-13 20:29:12,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939313429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:12,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852361327] [2021-07-13 20:29:12,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:12,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:29:12,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:12,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:29:12,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:12,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:12,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:12,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:12,355 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 21 treesize of output 37 [2021-07-13 20:29:12,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:29:12,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:12,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:12,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:15 [2021-07-13 20:29:12,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:12,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852361327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:12,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:12,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-07-13 20:29:12,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64694176] [2021-07-13 20:29:12,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:29:12,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:12,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:29:12,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:29:12,451 INFO L87 Difference]: Start difference. First operand 7083 states and 24188 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:15,606 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-07-13 20:29:15,815 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-07-13 20:29:16,319 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-07-13 20:29:17,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:17,586 INFO L93 Difference]: Finished difference Result 9072 states and 30203 transitions. [2021-07-13 20:29:17,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:29:17,586 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:29:17,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:17,604 INFO L225 Difference]: With dead ends: 9072 [2021-07-13 20:29:17,604 INFO L226 Difference]: Without dead ends: 9057 [2021-07-13 20:29:17,605 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 4485.2ms TimeCoverageRelationStatistics Valid=889, Invalid=6767, Unknown=0, NotChecked=0, Total=7656 [2021-07-13 20:29:17,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9057 states. [2021-07-13 20:29:17,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9057 to 7074. [2021-07-13 20:29:17,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7074 states, 7073 states have (on average 3.4155238229888307) internal successors, (24158), 7073 states have internal predecessors, (24158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:17,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7074 states to 7074 states and 24158 transitions. [2021-07-13 20:29:17,742 INFO L78 Accepts]: Start accepts. Automaton has 7074 states and 24158 transitions. Word has length 30 [2021-07-13 20:29:17,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:17,742 INFO L482 AbstractCegarLoop]: Abstraction has 7074 states and 24158 transitions. [2021-07-13 20:29:17,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:17,742 INFO L276 IsEmpty]: Start isEmpty. Operand 7074 states and 24158 transitions. [2021-07-13 20:29:17,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:29:17,798 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:17,798 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:17,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:17,998 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:17,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:17,999 INFO L82 PathProgramCache]: Analyzing trace with hash 499662597, now seen corresponding path program 49 times [2021-07-13 20:29:17,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:17,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876817806] [2021-07-13 20:29:17,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:18,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:18,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876817806] [2021-07-13 20:29:18,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876817806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:18,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357168122] [2021-07-13 20:29:18,401 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:18,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:29:18,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:18,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:18,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:18,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:29:18,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:29:18,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-13 20:29:18,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:18,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:18,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:18,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:29:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:18,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357168122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:18,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:18,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-07-13 20:29:18,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037493541] [2021-07-13 20:29:18,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:29:18,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:18,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:29:18,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:29:18,628 INFO L87 Difference]: Start difference. First operand 7074 states and 24158 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:21,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:21,281 INFO L93 Difference]: Finished difference Result 8621 states and 28929 transitions. [2021-07-13 20:29:21,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:29:21,281 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:29:21,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:21,300 INFO L225 Difference]: With dead ends: 8621 [2021-07-13 20:29:21,300 INFO L226 Difference]: Without dead ends: 8595 [2021-07-13 20:29:21,300 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 2261.3ms TimeCoverageRelationStatistics Valid=502, Invalid=3404, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:29:21,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8595 states. [2021-07-13 20:29:21,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8595 to 7060. [2021-07-13 20:29:21,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7060 states, 7059 states have (on average 3.417339566510837) internal successors, (24123), 7059 states have internal predecessors, (24123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:21,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7060 states to 7060 states and 24123 transitions. [2021-07-13 20:29:21,441 INFO L78 Accepts]: Start accepts. Automaton has 7060 states and 24123 transitions. Word has length 30 [2021-07-13 20:29:21,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:21,441 INFO L482 AbstractCegarLoop]: Abstraction has 7060 states and 24123 transitions. [2021-07-13 20:29:21,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:21,441 INFO L276 IsEmpty]: Start isEmpty. Operand 7060 states and 24123 transitions. [2021-07-13 20:29:21,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:29:21,453 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:21,453 INFO L508 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] [2021-07-13 20:29:21,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:21,653 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:21,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:21,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1728681022, now seen corresponding path program 68 times [2021-07-13 20:29:21,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:21,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220257505] [2021-07-13 20:29:21,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:21,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:21,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:21,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220257505] [2021-07-13 20:29:21,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220257505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:21,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967947650] [2021-07-13 20:29:21,828 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:21,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:29:21,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:21,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:29:21,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:22,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:22,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:29:22,081 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 19 treesize of output 11 [2021-07-13 20:29:22,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:22,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:22,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:22,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:29:22,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:22,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967947650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:22,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:22,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:29:22,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909981168] [2021-07-13 20:29:22,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:29:22,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:22,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:29:22,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:29:22,107 INFO L87 Difference]: Start difference. First operand 7060 states and 24123 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:23,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:23,084 INFO L93 Difference]: Finished difference Result 8380 states and 27726 transitions. [2021-07-13 20:29:23,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:29:23,084 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:29:23,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:23,101 INFO L225 Difference]: With dead ends: 8380 [2021-07-13 20:29:23,101 INFO L226 Difference]: Without dead ends: 8365 [2021-07-13 20:29:23,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 738.3ms TimeCoverageRelationStatistics Valid=190, Invalid=1216, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:29:23,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8365 states. [2021-07-13 20:29:23,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8365 to 7072. [2021-07-13 20:29:23,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7072 states, 7071 states have (on average 3.4171970018384954) internal successors, (24163), 7071 states have internal predecessors, (24163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:23,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7072 states to 7072 states and 24163 transitions. [2021-07-13 20:29:23,240 INFO L78 Accepts]: Start accepts. Automaton has 7072 states and 24163 transitions. Word has length 30 [2021-07-13 20:29:23,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:23,240 INFO L482 AbstractCegarLoop]: Abstraction has 7072 states and 24163 transitions. [2021-07-13 20:29:23,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:23,240 INFO L276 IsEmpty]: Start isEmpty. Operand 7072 states and 24163 transitions. [2021-07-13 20:29:23,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:29:23,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:23,252 INFO L508 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] [2021-07-13 20:29:23,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-07-13 20:29:23,452 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:23,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:23,453 INFO L82 PathProgramCache]: Analyzing trace with hash -691888966, now seen corresponding path program 69 times [2021-07-13 20:29:23,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:23,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709904499] [2021-07-13 20:29:23,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:23,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:23,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:23,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:23,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709904499] [2021-07-13 20:29:23,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709904499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:23,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688900426] [2021-07-13 20:29:23,606 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:23,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:29:23,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:23,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:29:23,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:23,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:23,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:29:23,967 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 19 treesize of output 11 [2021-07-13 20:29:23,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:23,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:23,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:23,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-07-13 20:29:23,994 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:23,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688900426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:23,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:23,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:29:23,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814828449] [2021-07-13 20:29:23,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:29:23,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:23,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:29:23,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:29:23,995 INFO L87 Difference]: Start difference. First operand 7072 states and 24163 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:25,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:25,083 INFO L93 Difference]: Finished difference Result 8309 states and 27513 transitions. [2021-07-13 20:29:25,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:29:25,083 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:29:25,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:25,101 INFO L225 Difference]: With dead ends: 8309 [2021-07-13 20:29:25,101 INFO L226 Difference]: Without dead ends: 8279 [2021-07-13 20:29:25,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 826.6ms TimeCoverageRelationStatistics Valid=228, Invalid=1412, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:29:25,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8279 states. [2021-07-13 20:29:25,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8279 to 7064. [2021-07-13 20:29:25,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7064 states, 7063 states have (on average 3.4176695455189012) internal successors, (24139), 7063 states have internal predecessors, (24139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:25,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7064 states to 7064 states and 24139 transitions. [2021-07-13 20:29:25,264 INFO L78 Accepts]: Start accepts. Automaton has 7064 states and 24139 transitions. Word has length 30 [2021-07-13 20:29:25,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:25,265 INFO L482 AbstractCegarLoop]: Abstraction has 7064 states and 24139 transitions. [2021-07-13 20:29:25,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:25,265 INFO L276 IsEmpty]: Start isEmpty. Operand 7064 states and 24139 transitions. [2021-07-13 20:29:25,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:29:25,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:25,276 INFO L508 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] [2021-07-13 20:29:25,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-07-13 20:29:25,477 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:25,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:25,477 INFO L82 PathProgramCache]: Analyzing trace with hash 682939496, now seen corresponding path program 70 times [2021-07-13 20:29:25,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:25,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457674740] [2021-07-13 20:29:25,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:25,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:25,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:25,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457674740] [2021-07-13 20:29:25,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457674740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:25,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105387997] [2021-07-13 20:29:25,648 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:25,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:29:25,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:25,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:29:25,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:25,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:25,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:25,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:29:25,869 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:29:25,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:25,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:25,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-13 20:29:25,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:25,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105387997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:25,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:25,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:29:25,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864969595] [2021-07-13 20:29:25,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:29:25,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:25,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:29:25,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:29:25,932 INFO L87 Difference]: Start difference. First operand 7064 states and 24139 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:28,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:28,539 INFO L93 Difference]: Finished difference Result 13253 states and 43828 transitions. [2021-07-13 20:29:28,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:29:28,540 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:29:28,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:28,568 INFO L225 Difference]: With dead ends: 13253 [2021-07-13 20:29:28,568 INFO L226 Difference]: Without dead ends: 13223 [2021-07-13 20:29:28,569 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1417 ImplicationChecksByTransitivity, 1797.4ms TimeCoverageRelationStatistics Valid=663, Invalid=3759, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:29:28,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13223 states. [2021-07-13 20:29:28,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13223 to 7065. [2021-07-13 20:29:28,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7065 states, 7064 states have (on average 3.4173272933182335) internal successors, (24140), 7064 states have internal predecessors, (24140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:28,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7065 states to 7065 states and 24140 transitions. [2021-07-13 20:29:28,742 INFO L78 Accepts]: Start accepts. Automaton has 7065 states and 24140 transitions. Word has length 30 [2021-07-13 20:29:28,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:28,742 INFO L482 AbstractCegarLoop]: Abstraction has 7065 states and 24140 transitions. [2021-07-13 20:29:28,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:28,742 INFO L276 IsEmpty]: Start isEmpty. Operand 7065 states and 24140 transitions. [2021-07-13 20:29:28,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:29:28,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:28,753 INFO L508 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] [2021-07-13 20:29:28,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-07-13 20:29:28,953 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:28,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:28,953 INFO L82 PathProgramCache]: Analyzing trace with hash -8608016, now seen corresponding path program 71 times [2021-07-13 20:29:28,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:28,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284068487] [2021-07-13 20:29:28,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:29,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:29,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:29,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284068487] [2021-07-13 20:29:29,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284068487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:29,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963647379] [2021-07-13 20:29:29,106 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:29,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:29:29,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:29,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:29:29,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:29,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:29,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:29:29,362 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 19 treesize of output 11 [2021-07-13 20:29:29,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:29,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:29,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:29,367 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:29:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:29,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963647379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:29,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:29,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:29:29,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940323966] [2021-07-13 20:29:29,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:29:29,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:29,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:29:29,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:29:29,388 INFO L87 Difference]: Start difference. First operand 7065 states and 24140 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:30,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:30,349 INFO L93 Difference]: Finished difference Result 8952 states and 29987 transitions. [2021-07-13 20:29:30,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:29:30,349 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:29:30,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:30,368 INFO L225 Difference]: With dead ends: 8952 [2021-07-13 20:29:30,368 INFO L226 Difference]: Without dead ends: 8937 [2021-07-13 20:29:30,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 639.6ms TimeCoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:29:30,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8937 states. [2021-07-13 20:29:30,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8937 to 7070. [2021-07-13 20:29:30,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7070 states, 7069 states have (on average 3.417032112038478) internal successors, (24155), 7069 states have internal predecessors, (24155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:30,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7070 states to 7070 states and 24155 transitions. [2021-07-13 20:29:30,501 INFO L78 Accepts]: Start accepts. Automaton has 7070 states and 24155 transitions. Word has length 30 [2021-07-13 20:29:30,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:30,501 INFO L482 AbstractCegarLoop]: Abstraction has 7070 states and 24155 transitions. [2021-07-13 20:29:30,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:30,501 INFO L276 IsEmpty]: Start isEmpty. Operand 7070 states and 24155 transitions. [2021-07-13 20:29:30,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:29:30,512 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:30,512 INFO L508 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] [2021-07-13 20:29:30,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-07-13 20:29:30,712 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:30,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:30,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1865789292, now seen corresponding path program 72 times [2021-07-13 20:29:30,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:30,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175575078] [2021-07-13 20:29:30,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:30,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:30,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:30,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175575078] [2021-07-13 20:29:30,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175575078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:30,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616952974] [2021-07-13 20:29:30,869 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:30,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:29:30,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:30,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:29:30,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:31,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:31,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:31,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:31,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-07-13 20:29:31,068 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:29:31,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:31,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:31,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-07-13 20:29:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:31,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616952974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:31,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:31,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:29:31,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47181959] [2021-07-13 20:29:31,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:29:31,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:31,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:29:31,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:29:31,138 INFO L87 Difference]: Start difference. First operand 7070 states and 24155 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:32,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:32,911 INFO L93 Difference]: Finished difference Result 9351 states and 31228 transitions. [2021-07-13 20:29:32,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:29:32,912 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:29:32,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:32,931 INFO L225 Difference]: With dead ends: 9351 [2021-07-13 20:29:32,931 INFO L226 Difference]: Without dead ends: 9316 [2021-07-13 20:29:32,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1217.2ms TimeCoverageRelationStatistics Valid=303, Invalid=2349, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:29:32,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9316 states. [2021-07-13 20:29:33,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9316 to 7069. [2021-07-13 20:29:33,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7069 states, 7068 states have (on average 3.4161007357102435) internal successors, (24145), 7068 states have internal predecessors, (24145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:33,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7069 states to 7069 states and 24145 transitions. [2021-07-13 20:29:33,080 INFO L78 Accepts]: Start accepts. Automaton has 7069 states and 24145 transitions. Word has length 30 [2021-07-13 20:29:33,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:33,080 INFO L482 AbstractCegarLoop]: Abstraction has 7069 states and 24145 transitions. [2021-07-13 20:29:33,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:33,080 INFO L276 IsEmpty]: Start isEmpty. Operand 7069 states and 24145 transitions. [2021-07-13 20:29:33,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:29:33,092 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:33,092 INFO L508 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] [2021-07-13 20:29:33,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-07-13 20:29:33,293 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:33,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:33,293 INFO L82 PathProgramCache]: Analyzing trace with hash -43636904, now seen corresponding path program 73 times [2021-07-13 20:29:33,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:33,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635546958] [2021-07-13 20:29:33,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:33,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:33,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:33,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:33,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635546958] [2021-07-13 20:29:33,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635546958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:33,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516618243] [2021-07-13 20:29:33,474 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:33,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:29:33,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:33,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:33,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:29:33,733 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 19 treesize of output 11 [2021-07-13 20:29:33,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:33,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:33,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:33,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:29:33,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:33,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516618243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:33,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:33,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:29:33,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347994004] [2021-07-13 20:29:33,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:29:33,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:33,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:29:33,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:29:33,760 INFO L87 Difference]: Start difference. First operand 7069 states and 24145 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:35,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:35,011 INFO L93 Difference]: Finished difference Result 9314 states and 31182 transitions. [2021-07-13 20:29:35,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:29:35,012 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:29:35,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:35,029 INFO L225 Difference]: With dead ends: 9314 [2021-07-13 20:29:35,029 INFO L226 Difference]: Without dead ends: 9299 [2021-07-13 20:29:35,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1051.5ms TimeCoverageRelationStatistics Valid=278, Invalid=1702, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:29:35,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9299 states. [2021-07-13 20:29:35,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9299 to 7071. [2021-07-13 20:29:35,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7071 states, 7070 states have (on average 3.4164073550212164) internal successors, (24154), 7070 states have internal predecessors, (24154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:35,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7071 states to 7071 states and 24154 transitions. [2021-07-13 20:29:35,160 INFO L78 Accepts]: Start accepts. Automaton has 7071 states and 24154 transitions. Word has length 30 [2021-07-13 20:29:35,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:35,160 INFO L482 AbstractCegarLoop]: Abstraction has 7071 states and 24154 transitions. [2021-07-13 20:29:35,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:35,160 INFO L276 IsEmpty]: Start isEmpty. Operand 7071 states and 24154 transitions. [2021-07-13 20:29:35,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:29:35,171 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:35,171 INFO L508 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] [2021-07-13 20:29:35,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:35,372 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:35,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:35,372 INFO L82 PathProgramCache]: Analyzing trace with hash 154706472, now seen corresponding path program 74 times [2021-07-13 20:29:35,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:35,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956186942] [2021-07-13 20:29:35,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:35,537 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:35,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:35,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956186942] [2021-07-13 20:29:35,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956186942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:35,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402856071] [2021-07-13 20:29:35,537 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:35,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:29:35,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:35,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:29:35,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:35,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:35,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:35,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:35,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-07-13 20:29:35,768 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:29:35,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:35,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:35,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:23 [2021-07-13 20:29:35,824 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:35,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402856071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:35,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:35,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:29:35,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549857750] [2021-07-13 20:29:35,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:29:35,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:35,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:29:35,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:29:35,825 INFO L87 Difference]: Start difference. First operand 7071 states and 24154 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:37,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:37,648 INFO L93 Difference]: Finished difference Result 9796 states and 32685 transitions. [2021-07-13 20:29:37,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:29:37,649 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:29:37,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:37,673 INFO L225 Difference]: With dead ends: 9796 [2021-07-13 20:29:37,673 INFO L226 Difference]: Without dead ends: 9781 [2021-07-13 20:29:37,673 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1314.8ms TimeCoverageRelationStatistics Valid=380, Invalid=2272, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:29:37,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9781 states. [2021-07-13 20:29:37,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9781 to 7069. [2021-07-13 20:29:37,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7069 states, 7068 states have (on average 3.4161007357102435) internal successors, (24145), 7068 states have internal predecessors, (24145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:37,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7069 states to 7069 states and 24145 transitions. [2021-07-13 20:29:37,843 INFO L78 Accepts]: Start accepts. Automaton has 7069 states and 24145 transitions. Word has length 30 [2021-07-13 20:29:37,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:37,843 INFO L482 AbstractCegarLoop]: Abstraction has 7069 states and 24145 transitions. [2021-07-13 20:29:37,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:37,843 INFO L276 IsEmpty]: Start isEmpty. Operand 7069 states and 24145 transitions. [2021-07-13 20:29:37,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:29:37,855 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:37,855 INFO L508 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] [2021-07-13 20:29:38,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2021-07-13 20:29:38,056 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:38,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:38,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1280772920, now seen corresponding path program 75 times [2021-07-13 20:29:38,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:38,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84398094] [2021-07-13 20:29:38,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:38,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:38,243 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:38,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:38,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84398094] [2021-07-13 20:29:38,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84398094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:38,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065025138] [2021-07-13 20:29:38,244 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:38,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:29:38,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:38,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:29:38,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:38,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:38,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:29:38,520 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 19 treesize of output 11 [2021-07-13 20:29:38,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:38,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:38,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:38,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-07-13 20:29:38,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:38,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065025138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:38,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:38,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:29:38,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296555605] [2021-07-13 20:29:38,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:29:38,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:38,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:29:38,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:29:38,548 INFO L87 Difference]: Start difference. First operand 7069 states and 24145 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-07-13 20:29:40,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:40,273 INFO L93 Difference]: Finished difference Result 11687 states and 38279 transitions. [2021-07-13 20:29:40,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:29:40,273 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 30 [2021-07-13 20:29:40,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:40,297 INFO L225 Difference]: With dead ends: 11687 [2021-07-13 20:29:40,297 INFO L226 Difference]: Without dead ends: 11666 [2021-07-13 20:29:40,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 1140.8ms TimeCoverageRelationStatistics Valid=400, Invalid=3022, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:29:40,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11666 states. [2021-07-13 20:29:40,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11666 to 7054. [2021-07-13 20:29:40,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7054 states, 7053 states have (on average 3.4162767616617042) internal successors, (24095), 7053 states have internal predecessors, (24095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:40,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7054 states to 7054 states and 24095 transitions. [2021-07-13 20:29:40,461 INFO L78 Accepts]: Start accepts. Automaton has 7054 states and 24095 transitions. Word has length 30 [2021-07-13 20:29:40,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:40,461 INFO L482 AbstractCegarLoop]: Abstraction has 7054 states and 24095 transitions. [2021-07-13 20:29:40,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-07-13 20:29:40,461 INFO L276 IsEmpty]: Start isEmpty. Operand 7054 states and 24095 transitions. [2021-07-13 20:29:40,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:29:40,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:40,473 INFO L508 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] [2021-07-13 20:29:40,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-07-13 20:29:40,675 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:40,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:40,675 INFO L82 PathProgramCache]: Analyzing trace with hash -575656810, now seen corresponding path program 76 times [2021-07-13 20:29:40,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:40,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815162838] [2021-07-13 20:29:40,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:40,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:40,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:40,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:40,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815162838] [2021-07-13 20:29:40,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815162838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:40,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737998707] [2021-07-13 20:29:40,842 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:40,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:29:40,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:40,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:29:40,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:41,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:41,246 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-07-13 20:29:41,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 56 [2021-07-13 20:29:41,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:41,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:41,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:41,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:75, output treesize:3 [2021-07-13 20:29:41,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:41,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737998707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:41,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:41,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:29:41,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413548905] [2021-07-13 20:29:41,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:29:41,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:41,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:29:41,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:29:41,287 INFO L87 Difference]: Start difference. First operand 7054 states and 24095 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-07-13 20:29:42,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:42,831 INFO L93 Difference]: Finished difference Result 10880 states and 36101 transitions. [2021-07-13 20:29:42,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:29:42,832 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 30 [2021-07-13 20:29:42,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:42,855 INFO L225 Difference]: With dead ends: 10880 [2021-07-13 20:29:42,855 INFO L226 Difference]: Without dead ends: 10859 [2021-07-13 20:29:42,855 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1032.1ms TimeCoverageRelationStatistics Valid=309, Invalid=1853, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:29:42,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10859 states. [2021-07-13 20:29:42,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10859 to 7061. [2021-07-13 20:29:42,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7061 states, 7060 states have (on average 3.41685552407932) internal successors, (24123), 7060 states have internal predecessors, (24123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:43,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7061 states to 7061 states and 24123 transitions. [2021-07-13 20:29:43,002 INFO L78 Accepts]: Start accepts. Automaton has 7061 states and 24123 transitions. Word has length 30 [2021-07-13 20:29:43,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:43,002 INFO L482 AbstractCegarLoop]: Abstraction has 7061 states and 24123 transitions. [2021-07-13 20:29:43,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-07-13 20:29:43,002 INFO L276 IsEmpty]: Start isEmpty. Operand 7061 states and 24123 transitions. [2021-07-13 20:29:43,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:29:43,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:43,012 INFO L508 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] [2021-07-13 20:29:43,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-07-13 20:29:43,213 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:43,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:43,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1197451026, now seen corresponding path program 77 times [2021-07-13 20:29:43,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:43,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106431013] [2021-07-13 20:29:43,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:43,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:43,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:43,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:43,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106431013] [2021-07-13 20:29:43,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106431013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:43,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238266865] [2021-07-13 20:29:43,387 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:43,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:29:43,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:43,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:29:43,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:43,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:43,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:43,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:29:43,643 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:29:43,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:43,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:43,652 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-13 20:29:43,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:43,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238266865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:43,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:43,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 20:29:43,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739929381] [2021-07-13 20:29:43,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:29:43,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:43,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:29:43,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:29:43,700 INFO L87 Difference]: Start difference. First operand 7061 states and 24123 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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) [2021-07-13 20:29:45,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:45,999 INFO L93 Difference]: Finished difference Result 11290 states and 37387 transitions. [2021-07-13 20:29:45,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:29:45,999 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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 30 [2021-07-13 20:29:46,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:46,023 INFO L225 Difference]: With dead ends: 11290 [2021-07-13 20:29:46,023 INFO L226 Difference]: Without dead ends: 11254 [2021-07-13 20:29:46,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 1596.4ms TimeCoverageRelationStatistics Valid=553, Invalid=3353, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:29:46,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11254 states. [2021-07-13 20:29:46,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11254 to 7068. [2021-07-13 20:29:46,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7068 states, 7067 states have (on average 3.4184236592613555) internal successors, (24158), 7067 states have internal predecessors, (24158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:46,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7068 states to 7068 states and 24158 transitions. [2021-07-13 20:29:46,192 INFO L78 Accepts]: Start accepts. Automaton has 7068 states and 24158 transitions. Word has length 30 [2021-07-13 20:29:46,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:46,192 INFO L482 AbstractCegarLoop]: Abstraction has 7068 states and 24158 transitions. [2021-07-13 20:29:46,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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) [2021-07-13 20:29:46,192 INFO L276 IsEmpty]: Start isEmpty. Operand 7068 states and 24158 transitions. [2021-07-13 20:29:46,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:29:46,204 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:46,204 INFO L508 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] [2021-07-13 20:29:46,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-07-13 20:29:46,404 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:46,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:46,404 INFO L82 PathProgramCache]: Analyzing trace with hash 479008484, now seen corresponding path program 78 times [2021-07-13 20:29:46,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:46,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474809779] [2021-07-13 20:29:46,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:46,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:46,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:46,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474809779] [2021-07-13 20:29:46,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474809779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:46,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005997704] [2021-07-13 20:29:46,579 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:46,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:29:46,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:46,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:29:46,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:46,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:46,839 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:46,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:29:46,841 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:29:46,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:46,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:46,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-13 20:29:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:46,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005997704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:46,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:46,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:29:46,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510370532] [2021-07-13 20:29:46,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:29:46,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:46,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:29:46,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:29:46,900 INFO L87 Difference]: Start difference. First operand 7068 states and 24158 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:48,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:48,770 INFO L93 Difference]: Finished difference Result 11632 states and 38612 transitions. [2021-07-13 20:29:48,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:29:48,770 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:29:48,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:48,799 INFO L225 Difference]: With dead ends: 11632 [2021-07-13 20:29:48,799 INFO L226 Difference]: Without dead ends: 11582 [2021-07-13 20:29:48,799 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1091.2ms TimeCoverageRelationStatistics Valid=360, Invalid=1992, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:29:48,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11582 states. [2021-07-13 20:29:48,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11582 to 7063. [2021-07-13 20:29:48,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7063 states, 7062 states have (on average 3.4170206740300197) internal successors, (24131), 7062 states have internal predecessors, (24131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:48,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7063 states to 7063 states and 24131 transitions. [2021-07-13 20:29:48,984 INFO L78 Accepts]: Start accepts. Automaton has 7063 states and 24131 transitions. Word has length 30 [2021-07-13 20:29:48,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:48,984 INFO L482 AbstractCegarLoop]: Abstraction has 7063 states and 24131 transitions. [2021-07-13 20:29:48,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:48,984 INFO L276 IsEmpty]: Start isEmpty. Operand 7063 states and 24131 transitions. [2021-07-13 20:29:48,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:29:48,995 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:48,996 INFO L508 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] [2021-07-13 20:29:49,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-07-13 20:29:49,196 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:49,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:49,197 INFO L82 PathProgramCache]: Analyzing trace with hash -327230800, now seen corresponding path program 79 times [2021-07-13 20:29:49,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:49,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891123898] [2021-07-13 20:29:49,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:49,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:49,391 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:49,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:49,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891123898] [2021-07-13 20:29:49,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891123898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:49,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597770369] [2021-07-13 20:29:49,391 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:49,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:49,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:29:49,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:49,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:49,615 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:49,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:29:49,616 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:29:49,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:49,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:49,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-13 20:29:49,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:49,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597770369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:49,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:49,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:29:49,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854478408] [2021-07-13 20:29:49,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:29:49,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:49,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:29:49,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:29:49,676 INFO L87 Difference]: Start difference. First operand 7063 states and 24131 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:50,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:50,958 INFO L93 Difference]: Finished difference Result 11229 states and 37406 transitions. [2021-07-13 20:29:50,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:29:50,958 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:29:50,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:50,983 INFO L225 Difference]: With dead ends: 11229 [2021-07-13 20:29:50,983 INFO L226 Difference]: Without dead ends: 11179 [2021-07-13 20:29:50,984 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 816.8ms TimeCoverageRelationStatistics Valid=262, Invalid=1460, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:29:50,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11179 states. [2021-07-13 20:29:51,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11179 to 7078. [2021-07-13 20:29:51,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7078 states, 7077 states have (on average 3.4183976261127595) internal successors, (24192), 7077 states have internal predecessors, (24192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:51,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7078 states to 7078 states and 24192 transitions. [2021-07-13 20:29:51,182 INFO L78 Accepts]: Start accepts. Automaton has 7078 states and 24192 transitions. Word has length 30 [2021-07-13 20:29:51,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:51,182 INFO L482 AbstractCegarLoop]: Abstraction has 7078 states and 24192 transitions. [2021-07-13 20:29:51,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:51,182 INFO L276 IsEmpty]: Start isEmpty. Operand 7078 states and 24192 transitions. [2021-07-13 20:29:51,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:29:51,193 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:51,193 INFO L508 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] [2021-07-13 20:29:51,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:51,394 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:51,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:51,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1558548792, now seen corresponding path program 80 times [2021-07-13 20:29:51,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:51,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401903376] [2021-07-13 20:29:51,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:51,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:51,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:51,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401903376] [2021-07-13 20:29:51,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401903376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:51,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019201832] [2021-07-13 20:29:51,602 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:51,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:29:51,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:51,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:29:51,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:51,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:51,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:51,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:51,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-07-13 20:29:51,811 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:29:51,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:51,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:51,819 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:20 [2021-07-13 20:29:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:51,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019201832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:51,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:51,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:29:51,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621742054] [2021-07-13 20:29:51,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:29:51,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:51,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:29:51,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:29:51,887 INFO L87 Difference]: Start difference. First operand 7078 states and 24192 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:53,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:53,369 INFO L93 Difference]: Finished difference Result 10337 states and 34372 transitions. [2021-07-13 20:29:53,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:29:53,369 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:29:53,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:53,391 INFO L225 Difference]: With dead ends: 10337 [2021-07-13 20:29:53,391 INFO L226 Difference]: Without dead ends: 10256 [2021-07-13 20:29:53,392 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1019.9ms TimeCoverageRelationStatistics Valid=311, Invalid=1851, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:29:53,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10256 states. [2021-07-13 20:29:53,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10256 to 7079. [2021-07-13 20:29:53,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7079 states, 7078 states have (on average 3.418338513704436) internal successors, (24195), 7078 states have internal predecessors, (24195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:53,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7079 states to 7079 states and 24195 transitions. [2021-07-13 20:29:53,561 INFO L78 Accepts]: Start accepts. Automaton has 7079 states and 24195 transitions. Word has length 30 [2021-07-13 20:29:53,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:53,562 INFO L482 AbstractCegarLoop]: Abstraction has 7079 states and 24195 transitions. [2021-07-13 20:29:53,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:53,562 INFO L276 IsEmpty]: Start isEmpty. Operand 7079 states and 24195 transitions. [2021-07-13 20:29:53,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:29:53,572 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:53,572 INFO L508 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] [2021-07-13 20:29:53,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-07-13 20:29:53,773 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:53,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:53,773 INFO L82 PathProgramCache]: Analyzing trace with hash 211718524, now seen corresponding path program 81 times [2021-07-13 20:29:53,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:53,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32572572] [2021-07-13 20:29:53,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:53,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:53,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:53,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32572572] [2021-07-13 20:29:53,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32572572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:53,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428612903] [2021-07-13 20:29:53,966 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:53,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:29:53,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:53,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:29:53,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:54,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:54,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:54,166 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 19 treesize of output 27 [2021-07-13 20:29:54,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:29:54,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:54,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:54,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:50 [2021-07-13 20:29:54,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:54,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428612903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:54,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:54,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:29:54,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204933694] [2021-07-13 20:29:54,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:29:54,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:54,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:29:54,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:29:54,305 INFO L87 Difference]: Start difference. First operand 7079 states and 24195 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-07-13 20:29:54,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:54,980 INFO L93 Difference]: Finished difference Result 8987 states and 30270 transitions. [2021-07-13 20:29:54,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:29:54,980 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:29:54,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:55,000 INFO L225 Difference]: With dead ends: 8987 [2021-07-13 20:29:55,001 INFO L226 Difference]: Without dead ends: 8962 [2021-07-13 20:29:55,001 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 607.0ms TimeCoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:29:55,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8962 states. [2021-07-13 20:29:55,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8962 to 7079. [2021-07-13 20:29:55,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7079 states, 7078 states have (on average 3.418338513704436) internal successors, (24195), 7078 states have internal predecessors, (24195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:55,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7079 states to 7079 states and 24195 transitions. [2021-07-13 20:29:55,152 INFO L78 Accepts]: Start accepts. Automaton has 7079 states and 24195 transitions. Word has length 30 [2021-07-13 20:29:55,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:55,152 INFO L482 AbstractCegarLoop]: Abstraction has 7079 states and 24195 transitions. [2021-07-13 20:29:55,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-07-13 20:29:55,152 INFO L276 IsEmpty]: Start isEmpty. Operand 7079 states and 24195 transitions. [2021-07-13 20:29:55,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:29:55,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:55,167 INFO L508 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] [2021-07-13 20:29:55,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-07-13 20:29:55,369 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:55,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:55,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1547132172, now seen corresponding path program 82 times [2021-07-13 20:29:55,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:55,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798790268] [2021-07-13 20:29:55,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:55,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:55,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:55,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798790268] [2021-07-13 20:29:55,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798790268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:55,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362453232] [2021-07-13 20:29:55,548 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:55,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:29:55,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:55,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:29:55,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:55,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:55,848 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:55,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:29:55,859 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:29:55,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:55,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:55,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-13 20:29:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:55,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362453232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:55,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:55,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:29:55,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254168443] [2021-07-13 20:29:55,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:29:55,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:55,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:29:55,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:29:55,916 INFO L87 Difference]: Start difference. First operand 7079 states and 24195 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:57,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:57,275 INFO L93 Difference]: Finished difference Result 9428 states and 31713 transitions. [2021-07-13 20:29:57,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:29:57,275 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:29:57,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:57,297 INFO L225 Difference]: With dead ends: 9428 [2021-07-13 20:29:57,297 INFO L226 Difference]: Without dead ends: 9413 [2021-07-13 20:29:57,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 907.0ms TimeCoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:29:57,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9413 states. [2021-07-13 20:29:57,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9413 to 7076. [2021-07-13 20:29:57,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7076 states, 7075 states have (on average 3.417950530035336) internal successors, (24182), 7075 states have internal predecessors, (24182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:57,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7076 states to 7076 states and 24182 transitions. [2021-07-13 20:29:57,451 INFO L78 Accepts]: Start accepts. Automaton has 7076 states and 24182 transitions. Word has length 30 [2021-07-13 20:29:57,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:57,451 INFO L482 AbstractCegarLoop]: Abstraction has 7076 states and 24182 transitions. [2021-07-13 20:29:57,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:57,451 INFO L276 IsEmpty]: Start isEmpty. Operand 7076 states and 24182 transitions. [2021-07-13 20:29:57,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:29:57,463 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:57,464 INFO L508 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] [2021-07-13 20:29:57,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable440 [2021-07-13 20:29:57,664 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:57,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:57,664 INFO L82 PathProgramCache]: Analyzing trace with hash 790201086, now seen corresponding path program 83 times [2021-07-13 20:29:57,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:57,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811746753] [2021-07-13 20:29:57,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:57,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:57,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:57,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811746753] [2021-07-13 20:29:57,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811746753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:57,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805997891] [2021-07-13 20:29:57,863 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:57,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:29:57,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:57,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:29:57,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:58,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:58,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:29:58,176 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 19 treesize of output 11 [2021-07-13 20:29:58,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:58,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:58,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:58,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:29:58,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:58,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805997891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:58,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:58,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:29:58,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198844145] [2021-07-13 20:29:58,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:29:58,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:58,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:29:58,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:29:58,203 INFO L87 Difference]: Start difference. First operand 7076 states and 24182 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:58,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:58,643 INFO L93 Difference]: Finished difference Result 8712 states and 29355 transitions. [2021-07-13 20:29:58,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:29:58,644 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:29:58,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:58,663 INFO L225 Difference]: With dead ends: 8712 [2021-07-13 20:29:58,663 INFO L226 Difference]: Without dead ends: 8691 [2021-07-13 20:29:58,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 490.9ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:29:58,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8691 states. [2021-07-13 20:29:58,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8691 to 7081. [2021-07-13 20:29:58,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7081 states, 7080 states have (on average 3.418502824858757) internal successors, (24203), 7080 states have internal predecessors, (24203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:58,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7081 states to 7081 states and 24203 transitions. [2021-07-13 20:29:58,801 INFO L78 Accepts]: Start accepts. Automaton has 7081 states and 24203 transitions. Word has length 30 [2021-07-13 20:29:58,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:58,801 INFO L482 AbstractCegarLoop]: Abstraction has 7081 states and 24203 transitions. [2021-07-13 20:29:58,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:58,801 INFO L276 IsEmpty]: Start isEmpty. Operand 7081 states and 24203 transitions. [2021-07-13 20:29:58,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:29:58,813 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:58,813 INFO L508 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] [2021-07-13 20:29:59,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-07-13 20:29:59,014 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:59,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:59,014 INFO L82 PathProgramCache]: Analyzing trace with hash 988544462, now seen corresponding path program 84 times [2021-07-13 20:29:59,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:59,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102397967] [2021-07-13 20:29:59,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:59,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:59,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:59,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:59,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102397967] [2021-07-13 20:29:59,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102397967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:59,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98542518] [2021-07-13 20:29:59,210 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:59,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:29:59,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:59,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:29:59,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:59,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:59,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:59,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:59,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:29:59,476 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:29:59,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:59,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:59,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:25 [2021-07-13 20:29:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:59,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98542518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:59,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:59,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2021-07-13 20:29:59,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123575429] [2021-07-13 20:29:59,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:29:59,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:59,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:29:59,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:29:59,561 INFO L87 Difference]: Start difference. First operand 7081 states and 24203 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:01,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:01,596 INFO L93 Difference]: Finished difference Result 9784 states and 32690 transitions. [2021-07-13 20:30:01,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:30:01,596 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:01,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:01,619 INFO L225 Difference]: With dead ends: 9784 [2021-07-13 20:30:01,619 INFO L226 Difference]: Without dead ends: 9744 [2021-07-13 20:30:01,620 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1335.3ms TimeCoverageRelationStatistics Valid=348, Invalid=2514, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:30:01,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9744 states. [2021-07-13 20:30:01,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9744 to 7077. [2021-07-13 20:30:01,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7077 states, 7076 states have (on average 3.4166195590729225) internal successors, (24176), 7076 states have internal predecessors, (24176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:01,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7077 states to 7077 states and 24176 transitions. [2021-07-13 20:30:01,792 INFO L78 Accepts]: Start accepts. Automaton has 7077 states and 24176 transitions. Word has length 30 [2021-07-13 20:30:01,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:01,793 INFO L482 AbstractCegarLoop]: Abstraction has 7077 states and 24176 transitions. [2021-07-13 20:30:01,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:01,793 INFO L276 IsEmpty]: Start isEmpty. Operand 7077 states and 24176 transitions. [2021-07-13 20:30:01,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:01,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:01,804 INFO L508 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] [2021-07-13 20:30:02,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-07-13 20:30:02,004 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:02,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:02,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1508282850, now seen corresponding path program 85 times [2021-07-13 20:30:02,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:02,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325787983] [2021-07-13 20:30:02,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:02,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:02,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:02,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325787983] [2021-07-13 20:30:02,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325787983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:02,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158223181] [2021-07-13 20:30:02,229 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:02,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:30:02,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:02,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:02,429 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:02,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:30:02,430 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:02,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:02,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:02,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-07-13 20:30:02,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:02,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158223181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:02,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:02,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:30:02,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77376972] [2021-07-13 20:30:02,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:30:02,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:02,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:30:02,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:30:02,517 INFO L87 Difference]: Start difference. First operand 7077 states and 24176 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-07-13 20:30:03,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:03,064 INFO L93 Difference]: Finished difference Result 8973 states and 30216 transitions. [2021-07-13 20:30:03,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:30:03,064 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:03,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:03,083 INFO L225 Difference]: With dead ends: 8973 [2021-07-13 20:30:03,083 INFO L226 Difference]: Without dead ends: 8938 [2021-07-13 20:30:03,083 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 526.9ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:30:03,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8938 states. [2021-07-13 20:30:03,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8938 to 7076. [2021-07-13 20:30:03,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7076 states, 7075 states have (on average 3.416678445229682) internal successors, (24173), 7075 states have internal predecessors, (24173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:03,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7076 states to 7076 states and 24173 transitions. [2021-07-13 20:30:03,224 INFO L78 Accepts]: Start accepts. Automaton has 7076 states and 24173 transitions. Word has length 30 [2021-07-13 20:30:03,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:03,224 INFO L482 AbstractCegarLoop]: Abstraction has 7076 states and 24173 transitions. [2021-07-13 20:30:03,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-07-13 20:30:03,224 INFO L276 IsEmpty]: Start isEmpty. Operand 7076 states and 24173 transitions. [2021-07-13 20:30:03,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:03,235 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:03,235 INFO L508 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] [2021-07-13 20:30:03,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:03,436 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:03,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:03,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1182471836, now seen corresponding path program 86 times [2021-07-13 20:30:03,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:03,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711538590] [2021-07-13 20:30:03,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:03,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:03,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:03,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711538590] [2021-07-13 20:30:03,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711538590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:03,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149175756] [2021-07-13 20:30:03,610 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:03,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:30:03,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:03,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:30:03,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:03,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:03,835 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:03,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:30:03,837 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:03,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:03,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:03,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-13 20:30:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:03,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149175756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:03,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:03,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:30:03,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774231905] [2021-07-13 20:30:03,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:30:03,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:03,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:30:03,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:30:03,891 INFO L87 Difference]: Start difference. First operand 7076 states and 24173 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:06,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:06,746 INFO L93 Difference]: Finished difference Result 12654 states and 41623 transitions. [2021-07-13 20:30:06,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:30:06,747 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:06,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:06,776 INFO L225 Difference]: With dead ends: 12654 [2021-07-13 20:30:06,776 INFO L226 Difference]: Without dead ends: 12575 [2021-07-13 20:30:06,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 2145.2ms TimeCoverageRelationStatistics Valid=754, Invalid=4358, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:30:06,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12575 states. [2021-07-13 20:30:06,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12575 to 7133. [2021-07-13 20:30:06,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7133 states, 7132 states have (on average 3.415171060011217) internal successors, (24357), 7132 states have internal predecessors, (24357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:06,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7133 states to 7133 states and 24357 transitions. [2021-07-13 20:30:06,944 INFO L78 Accepts]: Start accepts. Automaton has 7133 states and 24357 transitions. Word has length 30 [2021-07-13 20:30:06,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:06,944 INFO L482 AbstractCegarLoop]: Abstraction has 7133 states and 24357 transitions. [2021-07-13 20:30:06,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:06,944 INFO L276 IsEmpty]: Start isEmpty. Operand 7133 states and 24357 transitions. [2021-07-13 20:30:06,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:06,955 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:06,955 INFO L508 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] [2021-07-13 20:30:07,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:07,156 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:07,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:07,158 INFO L82 PathProgramCache]: Analyzing trace with hash -668317764, now seen corresponding path program 87 times [2021-07-13 20:30:07,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:07,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033693906] [2021-07-13 20:30:07,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:07,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:07,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:07,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:07,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033693906] [2021-07-13 20:30:07,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033693906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:07,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731525455] [2021-07-13 20:30:07,358 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:07,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:30:07,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:07,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:30:07,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:07,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:07,583 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:07,583 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 19 treesize of output 27 [2021-07-13 20:30:07,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:30:07,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:07,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:07,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:33, output treesize:65 [2021-07-13 20:30:07,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:07,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731525455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:07,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:07,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:30:07,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845781027] [2021-07-13 20:30:07,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:30:07,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:07,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:30:07,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:30:07,692 INFO L87 Difference]: Start difference. First operand 7133 states and 24357 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-07-13 20:30:09,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:09,286 INFO L93 Difference]: Finished difference Result 10504 states and 34841 transitions. [2021-07-13 20:30:09,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:30:09,287 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:09,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:09,309 INFO L225 Difference]: With dead ends: 10504 [2021-07-13 20:30:09,310 INFO L226 Difference]: Without dead ends: 10458 [2021-07-13 20:30:09,310 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 1322.2ms TimeCoverageRelationStatistics Valid=430, Invalid=2540, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:30:09,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10458 states. [2021-07-13 20:30:09,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10458 to 7177. [2021-07-13 20:30:09,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7177 states, 7176 states have (on average 3.4158305462653287) internal successors, (24512), 7176 states have internal predecessors, (24512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:09,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7177 states to 7177 states and 24512 transitions. [2021-07-13 20:30:09,523 INFO L78 Accepts]: Start accepts. Automaton has 7177 states and 24512 transitions. Word has length 30 [2021-07-13 20:30:09,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:09,523 INFO L482 AbstractCegarLoop]: Abstraction has 7177 states and 24512 transitions. [2021-07-13 20:30:09,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-07-13 20:30:09,524 INFO L276 IsEmpty]: Start isEmpty. Operand 7177 states and 24512 transitions. [2021-07-13 20:30:09,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:09,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:09,535 INFO L508 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] [2021-07-13 20:30:09,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:09,736 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:09,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:09,736 INFO L82 PathProgramCache]: Analyzing trace with hash -221047002, now seen corresponding path program 88 times [2021-07-13 20:30:09,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:09,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178213378] [2021-07-13 20:30:09,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:09,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:09,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:09,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178213378] [2021-07-13 20:30:09,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178213378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:09,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147886285] [2021-07-13 20:30:09,913 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:09,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:30:09,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:09,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:30:09,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:10,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:10,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:10,203 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 19 treesize of output 11 [2021-07-13 20:30:10,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:10,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:10,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:10,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:30:10,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:10,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147886285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:10,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:10,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:30:10,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176454300] [2021-07-13 20:30:10,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:30:10,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:10,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:30:10,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:30:10,233 INFO L87 Difference]: Start difference. First operand 7177 states and 24512 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:11,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:11,346 INFO L93 Difference]: Finished difference Result 8909 states and 29971 transitions. [2021-07-13 20:30:11,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:30:11,347 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:11,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:11,366 INFO L225 Difference]: With dead ends: 8909 [2021-07-13 20:30:11,366 INFO L226 Difference]: Without dead ends: 8888 [2021-07-13 20:30:11,366 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 682.7ms TimeCoverageRelationStatistics Valid=175, Invalid=1085, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:30:11,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8888 states. [2021-07-13 20:30:11,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8888 to 7177. [2021-07-13 20:30:11,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7177 states, 7176 states have (on average 3.4158305462653287) internal successors, (24512), 7176 states have internal predecessors, (24512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:11,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7177 states to 7177 states and 24512 transitions. [2021-07-13 20:30:11,497 INFO L78 Accepts]: Start accepts. Automaton has 7177 states and 24512 transitions. Word has length 30 [2021-07-13 20:30:11,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:11,497 INFO L482 AbstractCegarLoop]: Abstraction has 7177 states and 24512 transitions. [2021-07-13 20:30:11,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:11,497 INFO L276 IsEmpty]: Start isEmpty. Operand 7177 states and 24512 transitions. [2021-07-13 20:30:11,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:11,508 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:11,508 INFO L508 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] [2021-07-13 20:30:11,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-07-13 20:30:11,710 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:11,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:11,710 INFO L82 PathProgramCache]: Analyzing trace with hash 43416822, now seen corresponding path program 89 times [2021-07-13 20:30:11,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:11,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57385601] [2021-07-13 20:30:11,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:11,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:11,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:11,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:11,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57385601] [2021-07-13 20:30:11,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57385601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:11,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955884280] [2021-07-13 20:30:11,948 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:12,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:30:12,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:12,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:30:12,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:12,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:12,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:12,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-07-13 20:30:12,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:30:12,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:12,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:12,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:67 [2021-07-13 20:30:12,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:12,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955884280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:12,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:12,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 20:30:12,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273497747] [2021-07-13 20:30:12,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:30:12,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:12,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:30:12,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:30:12,547 INFO L87 Difference]: Start difference. First operand 7177 states and 24512 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:14,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:14,927 INFO L93 Difference]: Finished difference Result 9613 states and 32165 transitions. [2021-07-13 20:30:14,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:30:14,927 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:14,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:14,948 INFO L225 Difference]: With dead ends: 9613 [2021-07-13 20:30:14,948 INFO L226 Difference]: Without dead ends: 9533 [2021-07-13 20:30:14,949 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1960.6ms TimeCoverageRelationStatistics Valid=343, Invalid=2107, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:30:14,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9533 states. [2021-07-13 20:30:15,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9533 to 7204. [2021-07-13 20:30:15,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7204 states, 7203 states have (on average 3.414549493266694) internal successors, (24595), 7203 states have internal predecessors, (24595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:15,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7204 states to 7204 states and 24595 transitions. [2021-07-13 20:30:15,135 INFO L78 Accepts]: Start accepts. Automaton has 7204 states and 24595 transitions. Word has length 30 [2021-07-13 20:30:15,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:15,135 INFO L482 AbstractCegarLoop]: Abstraction has 7204 states and 24595 transitions. [2021-07-13 20:30:15,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:15,135 INFO L276 IsEmpty]: Start isEmpty. Operand 7204 states and 24595 transitions. [2021-07-13 20:30:15,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:15,147 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:15,148 INFO L508 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] [2021-07-13 20:30:15,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-07-13 20:30:15,348 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:15,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:15,349 INFO L82 PathProgramCache]: Analyzing trace with hash -572506508, now seen corresponding path program 90 times [2021-07-13 20:30:15,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:15,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828077865] [2021-07-13 20:30:15,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:15,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:15,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828077865] [2021-07-13 20:30:15,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828077865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:15,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516782765] [2021-07-13 20:30:15,631 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:15,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:30:15,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:15,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:30:15,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:15,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:15,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:15,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:15,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-07-13 20:30:15,868 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:15,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:15,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:15,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-07-13 20:30:15,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:15,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516782765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:15,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:15,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:30:15,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741546545] [2021-07-13 20:30:15,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:30:15,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:15,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:30:15,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:30:15,953 INFO L87 Difference]: Start difference. First operand 7204 states and 24595 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:18,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:18,743 INFO L93 Difference]: Finished difference Result 10561 states and 34976 transitions. [2021-07-13 20:30:18,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:30:18,743 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:18,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:18,765 INFO L225 Difference]: With dead ends: 10561 [2021-07-13 20:30:18,765 INFO L226 Difference]: Without dead ends: 10514 [2021-07-13 20:30:18,765 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1820.4ms TimeCoverageRelationStatistics Valid=430, Invalid=2992, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:30:18,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10514 states. [2021-07-13 20:30:18,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10514 to 7197. [2021-07-13 20:30:18,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7197 states, 7196 states have (on average 3.415230683713174) internal successors, (24576), 7196 states have internal predecessors, (24576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:18,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7197 states to 7197 states and 24576 transitions. [2021-07-13 20:30:18,910 INFO L78 Accepts]: Start accepts. Automaton has 7197 states and 24576 transitions. Word has length 30 [2021-07-13 20:30:18,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:18,910 INFO L482 AbstractCegarLoop]: Abstraction has 7197 states and 24576 transitions. [2021-07-13 20:30:18,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:18,911 INFO L276 IsEmpty]: Start isEmpty. Operand 7197 states and 24576 transitions. [2021-07-13 20:30:18,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:18,921 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:18,922 INFO L508 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] [2021-07-13 20:30:19,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-07-13 20:30:19,122 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:19,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:19,122 INFO L82 PathProgramCache]: Analyzing trace with hash -124071064, now seen corresponding path program 91 times [2021-07-13 20:30:19,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:19,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096038149] [2021-07-13 20:30:19,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:19,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:19,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:19,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096038149] [2021-07-13 20:30:19,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096038149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:19,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024008767] [2021-07-13 20:30:19,427 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:19,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:19,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:30:19,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:19,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:19,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:19,658 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 19 treesize of output 11 [2021-07-13 20:30:19,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:19,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:19,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:19,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:30:19,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:19,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024008767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:19,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:19,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-07-13 20:30:19,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685817359] [2021-07-13 20:30:19,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:30:19,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:19,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:30:19,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:30:19,688 INFO L87 Difference]: Start difference. First operand 7197 states and 24576 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2021-07-13 20:30:20,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:20,799 INFO L93 Difference]: Finished difference Result 8814 states and 29558 transitions. [2021-07-13 20:30:20,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:30:20,800 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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 30 [2021-07-13 20:30:20,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:20,817 INFO L225 Difference]: With dead ends: 8814 [2021-07-13 20:30:20,817 INFO L226 Difference]: Without dead ends: 8788 [2021-07-13 20:30:20,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 990.9ms TimeCoverageRelationStatistics Valid=262, Invalid=1460, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:30:20,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8788 states. [2021-07-13 20:30:20,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8788 to 7205. [2021-07-13 20:30:20,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7205 states, 7204 states have (on average 3.4144919489172683) internal successors, (24598), 7204 states have internal predecessors, (24598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:20,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7205 states to 7205 states and 24598 transitions. [2021-07-13 20:30:20,989 INFO L78 Accepts]: Start accepts. Automaton has 7205 states and 24598 transitions. Word has length 30 [2021-07-13 20:30:20,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:20,990 INFO L482 AbstractCegarLoop]: Abstraction has 7205 states and 24598 transitions. [2021-07-13 20:30:20,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2021-07-13 20:30:20,990 INFO L276 IsEmpty]: Start isEmpty. Operand 7205 states and 24598 transitions. [2021-07-13 20:30:21,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:21,000 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:21,000 INFO L508 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] [2021-07-13 20:30:21,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:21,201 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:21,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:21,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1414795236, now seen corresponding path program 92 times [2021-07-13 20:30:21,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:21,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986409691] [2021-07-13 20:30:21,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:21,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:21,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:21,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986409691] [2021-07-13 20:30:21,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986409691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:21,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615989787] [2021-07-13 20:30:21,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:21,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:30:21,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:21,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:30:21,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:21,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:21,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:21,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:30:21,641 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:21,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:21,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:21,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-13 20:30:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:21,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615989787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:21,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:21,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:30:21,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848328969] [2021-07-13 20:30:21,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:30:21,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:21,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:30:21,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:30:21,695 INFO L87 Difference]: Start difference. First operand 7205 states and 24598 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2021-07-13 20:30:25,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:25,093 INFO L93 Difference]: Finished difference Result 12224 states and 40164 transitions. [2021-07-13 20:30:25,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-07-13 20:30:25,093 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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 30 [2021-07-13 20:30:25,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:25,119 INFO L225 Difference]: With dead ends: 12224 [2021-07-13 20:30:25,119 INFO L226 Difference]: Without dead ends: 12147 [2021-07-13 20:30:25,120 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2429 ImplicationChecksByTransitivity, 2659.9ms TimeCoverageRelationStatistics Valid=1026, Invalid=5946, Unknown=0, NotChecked=0, Total=6972 [2021-07-13 20:30:25,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12147 states. [2021-07-13 20:30:25,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12147 to 7309. [2021-07-13 20:30:25,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7309 states, 7308 states have (on average 3.4143404488232076) internal successors, (24952), 7308 states have internal predecessors, (24952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:25,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7309 states to 7309 states and 24952 transitions. [2021-07-13 20:30:25,291 INFO L78 Accepts]: Start accepts. Automaton has 7309 states and 24952 transitions. Word has length 30 [2021-07-13 20:30:25,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:25,291 INFO L482 AbstractCegarLoop]: Abstraction has 7309 states and 24952 transitions. [2021-07-13 20:30:25,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2021-07-13 20:30:25,292 INFO L276 IsEmpty]: Start isEmpty. Operand 7309 states and 24952 transitions. [2021-07-13 20:30:25,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:25,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:25,303 INFO L508 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] [2021-07-13 20:30:25,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:25,503 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:25,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:25,504 INFO L82 PathProgramCache]: Analyzing trace with hash 781180196, now seen corresponding path program 93 times [2021-07-13 20:30:25,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:25,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914275958] [2021-07-13 20:30:25,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:25,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:25,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:25,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:25,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914275958] [2021-07-13 20:30:25,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914275958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:25,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142764770] [2021-07-13 20:30:25,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:25,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:30:25,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:25,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:30:25,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:25,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:25,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:25,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:30:25,930 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:25,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:25,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:25,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-13 20:30:25,987 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:25,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142764770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:25,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:25,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:30:25,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705679937] [2021-07-13 20:30:25,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:30:25,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:25,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:30:25,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:30:25,988 INFO L87 Difference]: Start difference. First operand 7309 states and 24952 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:28,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:28,778 INFO L93 Difference]: Finished difference Result 12077 states and 39682 transitions. [2021-07-13 20:30:28,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-13 20:30:28,779 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:28,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:28,804 INFO L225 Difference]: With dead ends: 12077 [2021-07-13 20:30:28,805 INFO L226 Difference]: Without dead ends: 11990 [2021-07-13 20:30:28,805 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 2184.5ms TimeCoverageRelationStatistics Valid=929, Invalid=5077, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:30:28,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11990 states. [2021-07-13 20:30:28,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11990 to 7424. [2021-07-13 20:30:28,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7424 states, 7423 states have (on average 3.416004310925502) internal successors, (25357), 7423 states have internal predecessors, (25357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:28,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7424 states to 7424 states and 25357 transitions. [2021-07-13 20:30:28,988 INFO L78 Accepts]: Start accepts. Automaton has 7424 states and 25357 transitions. Word has length 30 [2021-07-13 20:30:28,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:28,988 INFO L482 AbstractCegarLoop]: Abstraction has 7424 states and 25357 transitions. [2021-07-13 20:30:28,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:28,988 INFO L276 IsEmpty]: Start isEmpty. Operand 7424 states and 25357 transitions. [2021-07-13 20:30:29,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:29,000 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:29,000 INFO L508 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] [2021-07-13 20:30:29,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-07-13 20:30:29,201 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:29,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:29,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1722423664, now seen corresponding path program 94 times [2021-07-13 20:30:29,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:29,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973558748] [2021-07-13 20:30:29,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:29,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:29,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:29,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:29,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973558748] [2021-07-13 20:30:29,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973558748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:29,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66813739] [2021-07-13 20:30:29,478 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:29,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:30:29,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:29,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:30:29,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:29,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:29,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:29,724 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 19 treesize of output 11 [2021-07-13 20:30:29,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:29,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:29,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:29,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:30:29,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:29,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66813739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:29,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:29,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:30:29,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994511229] [2021-07-13 20:30:29,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:30:29,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:29,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:30:29,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:30:29,809 INFO L87 Difference]: Start difference. First operand 7424 states and 25357 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:32,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:32,526 INFO L93 Difference]: Finished difference Result 10675 states and 35520 transitions. [2021-07-13 20:30:32,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 20:30:32,526 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:32,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:32,548 INFO L225 Difference]: With dead ends: 10675 [2021-07-13 20:30:32,548 INFO L226 Difference]: Without dead ends: 10642 [2021-07-13 20:30:32,549 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 2072.2ms TimeCoverageRelationStatistics Valid=612, Invalid=3944, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:30:32,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10642 states. [2021-07-13 20:30:32,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10642 to 7435. [2021-07-13 20:30:32,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7435 states, 7434 states have (on average 3.4170029593758406) internal successors, (25402), 7434 states have internal predecessors, (25402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:32,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7435 states to 7435 states and 25402 transitions. [2021-07-13 20:30:32,746 INFO L78 Accepts]: Start accepts. Automaton has 7435 states and 25402 transitions. Word has length 30 [2021-07-13 20:30:32,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:32,746 INFO L482 AbstractCegarLoop]: Abstraction has 7435 states and 25402 transitions. [2021-07-13 20:30:32,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:32,746 INFO L276 IsEmpty]: Start isEmpty. Operand 7435 states and 25402 transitions. [2021-07-13 20:30:32,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:32,758 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:32,759 INFO L508 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] [2021-07-13 20:30:32,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-07-13 20:30:32,959 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:32,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:32,960 INFO L82 PathProgramCache]: Analyzing trace with hash 344478350, now seen corresponding path program 95 times [2021-07-13 20:30:32,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:32,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118820517] [2021-07-13 20:30:32,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:33,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:33,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118820517] [2021-07-13 20:30:33,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118820517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:33,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725884667] [2021-07-13 20:30:33,173 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:33,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:30:33,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:33,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:30:33,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:33,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:33,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:33,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:30:33,434 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:33,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:33,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:33,446 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-13 20:30:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:33,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725884667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:33,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:33,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:30:33,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342016669] [2021-07-13 20:30:33,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:30:33,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:33,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:30:33,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:30:33,503 INFO L87 Difference]: Start difference. First operand 7435 states and 25402 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-07-13 20:30:34,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:34,700 INFO L93 Difference]: Finished difference Result 10176 states and 34003 transitions. [2021-07-13 20:30:34,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:30:34,700 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:34,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:34,722 INFO L225 Difference]: With dead ends: 10176 [2021-07-13 20:30:34,722 INFO L226 Difference]: Without dead ends: 10123 [2021-07-13 20:30:34,722 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1106.2ms TimeCoverageRelationStatistics Valid=327, Invalid=1929, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:30:34,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10123 states. [2021-07-13 20:30:34,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10123 to 7439. [2021-07-13 20:30:34,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7439 states, 7438 states have (on average 3.4167787039526756) internal successors, (25414), 7438 states have internal predecessors, (25414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:34,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7439 states to 7439 states and 25414 transitions. [2021-07-13 20:30:34,877 INFO L78 Accepts]: Start accepts. Automaton has 7439 states and 25414 transitions. Word has length 30 [2021-07-13 20:30:34,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:34,878 INFO L482 AbstractCegarLoop]: Abstraction has 7439 states and 25414 transitions. [2021-07-13 20:30:34,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-07-13 20:30:34,878 INFO L276 IsEmpty]: Start isEmpty. Operand 7439 states and 25414 transitions. [2021-07-13 20:30:34,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:34,889 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:34,889 INFO L508 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] [2021-07-13 20:30:35,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:35,099 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:35,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:35,100 INFO L82 PathProgramCache]: Analyzing trace with hash -2112307908, now seen corresponding path program 96 times [2021-07-13 20:30:35,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:35,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348044751] [2021-07-13 20:30:35,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:35,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:35,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:35,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:35,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348044751] [2021-07-13 20:30:35,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348044751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:35,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114410250] [2021-07-13 20:30:35,321 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:35,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:30:35,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:35,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:30:35,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:35,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:35,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:35,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:35,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-07-13 20:30:35,566 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:35,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:35,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:35,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-07-13 20:30:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:35,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114410250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:35,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:35,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:30:35,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555635730] [2021-07-13 20:30:35,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:30:35,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:35,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:30:35,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:30:35,640 INFO L87 Difference]: Start difference. First operand 7439 states and 25414 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:36,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:36,162 INFO L93 Difference]: Finished difference Result 9163 states and 30845 transitions. [2021-07-13 20:30:36,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:30:36,162 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:36,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:36,181 INFO L225 Difference]: With dead ends: 9163 [2021-07-13 20:30:36,182 INFO L226 Difference]: Without dead ends: 9128 [2021-07-13 20:30:36,182 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 567.6ms TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:30:36,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9128 states. [2021-07-13 20:30:36,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9128 to 7444. [2021-07-13 20:30:36,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7444 states, 7443 states have (on average 3.4167674324869006) internal successors, (25431), 7443 states have internal predecessors, (25431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:36,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7444 states to 7444 states and 25431 transitions. [2021-07-13 20:30:36,321 INFO L78 Accepts]: Start accepts. Automaton has 7444 states and 25431 transitions. Word has length 30 [2021-07-13 20:30:36,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:36,322 INFO L482 AbstractCegarLoop]: Abstraction has 7444 states and 25431 transitions. [2021-07-13 20:30:36,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:36,322 INFO L276 IsEmpty]: Start isEmpty. Operand 7444 states and 25431 transitions. [2021-07-13 20:30:36,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:36,334 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:36,334 INFO L508 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] [2021-07-13 20:30:36,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:36,535 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:36,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:36,535 INFO L82 PathProgramCache]: Analyzing trace with hash 697570062, now seen corresponding path program 97 times [2021-07-13 20:30:36,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:36,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059802555] [2021-07-13 20:30:36,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:36,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:36,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:36,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059802555] [2021-07-13 20:30:36,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059802555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:36,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689057387] [2021-07-13 20:30:36,757 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:36,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:30:36,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:36,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:36,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:36,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:30:36,965 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:36,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:36,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:36,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-13 20:30:37,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:37,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689057387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:37,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:37,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:30:37,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394005157] [2021-07-13 20:30:37,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:30:37,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:37,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:30:37,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:30:37,018 INFO L87 Difference]: Start difference. First operand 7444 states and 25431 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:37,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:37,742 INFO L93 Difference]: Finished difference Result 9484 states and 31723 transitions. [2021-07-13 20:30:37,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:30:37,743 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:37,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:37,762 INFO L225 Difference]: With dead ends: 9484 [2021-07-13 20:30:37,763 INFO L226 Difference]: Without dead ends: 9449 [2021-07-13 20:30:37,763 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 625.7ms TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:30:37,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9449 states. [2021-07-13 20:30:37,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9449 to 7453. [2021-07-13 20:30:37,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7453 states, 7452 states have (on average 3.416935050993022) internal successors, (25463), 7452 states have internal predecessors, (25463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:37,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7453 states to 7453 states and 25463 transitions. [2021-07-13 20:30:37,942 INFO L78 Accepts]: Start accepts. Automaton has 7453 states and 25463 transitions. Word has length 30 [2021-07-13 20:30:37,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:37,942 INFO L482 AbstractCegarLoop]: Abstraction has 7453 states and 25463 transitions. [2021-07-13 20:30:37,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:37,942 INFO L276 IsEmpty]: Start isEmpty. Operand 7453 states and 25463 transitions. [2021-07-13 20:30:37,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:37,955 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:37,955 INFO L508 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] [2021-07-13 20:30:38,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:38,156 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:38,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:38,157 INFO L82 PathProgramCache]: Analyzing trace with hash -992372842, now seen corresponding path program 98 times [2021-07-13 20:30:38,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:38,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466520937] [2021-07-13 20:30:38,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:38,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:38,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466520937] [2021-07-13 20:30:38,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466520937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:38,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919659667] [2021-07-13 20:30:38,379 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:38,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:30:38,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:38,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:30:38,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:38,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:38,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:38,618 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 19 treesize of output 11 [2021-07-13 20:30:38,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:38,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:38,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:38,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:30:38,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:38,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919659667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:38,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:38,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:30:38,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240915266] [2021-07-13 20:30:38,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:30:38,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:38,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:30:38,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:30:38,647 INFO L87 Difference]: Start difference. First operand 7453 states and 25463 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:39,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:39,219 INFO L93 Difference]: Finished difference Result 8692 states and 29282 transitions. [2021-07-13 20:30:39,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:30:39,219 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:39,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:39,237 INFO L225 Difference]: With dead ends: 8692 [2021-07-13 20:30:39,238 INFO L226 Difference]: Without dead ends: 8666 [2021-07-13 20:30:39,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 507.1ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:30:39,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8666 states. [2021-07-13 20:30:39,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8666 to 7455. [2021-07-13 20:30:39,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7455 states, 7454 states have (on average 3.4174939629729004) internal successors, (25474), 7454 states have internal predecessors, (25474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:39,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7455 states to 7455 states and 25474 transitions. [2021-07-13 20:30:39,372 INFO L78 Accepts]: Start accepts. Automaton has 7455 states and 25474 transitions. Word has length 30 [2021-07-13 20:30:39,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:39,372 INFO L482 AbstractCegarLoop]: Abstraction has 7455 states and 25474 transitions. [2021-07-13 20:30:39,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:39,373 INFO L276 IsEmpty]: Start isEmpty. Operand 7455 states and 25474 transitions. [2021-07-13 20:30:39,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:39,385 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:39,385 INFO L508 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] [2021-07-13 20:30:39,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-07-13 20:30:39,589 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:39,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:39,589 INFO L82 PathProgramCache]: Analyzing trace with hash 961333420, now seen corresponding path program 99 times [2021-07-13 20:30:39,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:39,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601925348] [2021-07-13 20:30:39,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:39,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:39,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:39,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:39,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601925348] [2021-07-13 20:30:39,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601925348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:39,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960454564] [2021-07-13 20:30:39,785 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:39,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:30:39,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:39,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:30:39,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:40,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:40,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:40,049 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 19 treesize of output 27 [2021-07-13 20:30:40,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:30:40,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:40,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:40,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:53 [2021-07-13 20:30:40,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:40,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960454564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:40,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:40,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 20:30:40,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858125487] [2021-07-13 20:30:40,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:30:40,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:40,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:30:40,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:30:40,204 INFO L87 Difference]: Start difference. First operand 7455 states and 25474 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:43,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:43,192 INFO L93 Difference]: Finished difference Result 9935 states and 33090 transitions. [2021-07-13 20:30:43,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:30:43,193 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:43,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:43,214 INFO L225 Difference]: With dead ends: 9935 [2021-07-13 20:30:43,215 INFO L226 Difference]: Without dead ends: 9895 [2021-07-13 20:30:43,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 2089.3ms TimeCoverageRelationStatistics Valid=403, Invalid=3629, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:30:43,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9895 states. [2021-07-13 20:30:43,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9895 to 7459. [2021-07-13 20:30:43,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7459 states, 7458 states have (on average 3.417538213998391) internal successors, (25488), 7458 states have internal predecessors, (25488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:43,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7459 states to 7459 states and 25488 transitions. [2021-07-13 20:30:43,371 INFO L78 Accepts]: Start accepts. Automaton has 7459 states and 25488 transitions. Word has length 30 [2021-07-13 20:30:43,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:43,371 INFO L482 AbstractCegarLoop]: Abstraction has 7459 states and 25488 transitions. [2021-07-13 20:30:43,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:43,371 INFO L276 IsEmpty]: Start isEmpty. Operand 7459 states and 25488 transitions. [2021-07-13 20:30:43,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:43,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:43,384 INFO L508 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] [2021-07-13 20:30:43,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-07-13 20:30:43,589 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:43,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:43,589 INFO L82 PathProgramCache]: Analyzing trace with hash -542447488, now seen corresponding path program 100 times [2021-07-13 20:30:43,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:43,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562864135] [2021-07-13 20:30:43,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:43,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:43,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:43,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562864135] [2021-07-13 20:30:43,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562864135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:43,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401583142] [2021-07-13 20:30:43,836 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:43,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:30:43,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:43,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:30:43,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:44,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:44,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:44,093 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 19 treesize of output 11 [2021-07-13 20:30:44,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:44,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:44,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:44,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:30:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:44,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401583142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:44,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:44,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:30:44,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722332932] [2021-07-13 20:30:44,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:30:44,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:44,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:30:44,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:30:44,120 INFO L87 Difference]: Start difference. First operand 7459 states and 25488 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:45,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:45,137 INFO L93 Difference]: Finished difference Result 9448 states and 31860 transitions. [2021-07-13 20:30:45,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:30:45,138 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:45,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:45,158 INFO L225 Difference]: With dead ends: 9448 [2021-07-13 20:30:45,158 INFO L226 Difference]: Without dead ends: 9433 [2021-07-13 20:30:45,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 863.6ms TimeCoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:30:45,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9433 states. [2021-07-13 20:30:45,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9433 to 7463. [2021-07-13 20:30:45,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7463 states, 7462 states have (on average 3.4178504422406863) internal successors, (25504), 7462 states have internal predecessors, (25504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:45,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7463 states to 7463 states and 25504 transitions. [2021-07-13 20:30:45,301 INFO L78 Accepts]: Start accepts. Automaton has 7463 states and 25504 transitions. Word has length 30 [2021-07-13 20:30:45,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:45,301 INFO L482 AbstractCegarLoop]: Abstraction has 7463 states and 25504 transitions. [2021-07-13 20:30:45,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:45,302 INFO L276 IsEmpty]: Start isEmpty. Operand 7463 states and 25504 transitions. [2021-07-13 20:30:45,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:45,313 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:45,313 INFO L508 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] [2021-07-13 20:30:45,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:45,514 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:45,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:45,514 INFO L82 PathProgramCache]: Analyzing trace with hash -796111322, now seen corresponding path program 101 times [2021-07-13 20:30:45,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:45,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882463319] [2021-07-13 20:30:45,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:45,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:45,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882463319] [2021-07-13 20:30:45,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882463319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:45,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395737096] [2021-07-13 20:30:45,707 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:45,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:30:45,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:45,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:30:45,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:45,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:45,951 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:45,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:30:45,952 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:45,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:45,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:45,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-13 20:30:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:46,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395737096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:46,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:46,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:30:46,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99708916] [2021-07-13 20:30:46,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:30:46,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:46,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:30:46,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:30:46,007 INFO L87 Difference]: Start difference. First operand 7463 states and 25504 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:47,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:47,247 INFO L93 Difference]: Finished difference Result 9840 states and 33135 transitions. [2021-07-13 20:30:47,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:30:47,248 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:47,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:47,270 INFO L225 Difference]: With dead ends: 9840 [2021-07-13 20:30:47,270 INFO L226 Difference]: Without dead ends: 9825 [2021-07-13 20:30:47,271 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1035.7ms TimeCoverageRelationStatistics Valid=257, Invalid=1465, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:30:47,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9825 states. [2021-07-13 20:30:47,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9825 to 7460. [2021-07-13 20:30:47,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7460 states, 7459 states have (on average 3.417482236224695) internal successors, (25491), 7459 states have internal predecessors, (25491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:47,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7460 states to 7460 states and 25491 transitions. [2021-07-13 20:30:47,433 INFO L78 Accepts]: Start accepts. Automaton has 7460 states and 25491 transitions. Word has length 30 [2021-07-13 20:30:47,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:47,433 INFO L482 AbstractCegarLoop]: Abstraction has 7460 states and 25491 transitions. [2021-07-13 20:30:47,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:47,433 INFO L276 IsEmpty]: Start isEmpty. Operand 7460 states and 25491 transitions. [2021-07-13 20:30:47,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:47,445 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:47,445 INFO L508 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] [2021-07-13 20:30:47,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:47,645 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:47,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:47,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1339332396, now seen corresponding path program 102 times [2021-07-13 20:30:47,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:47,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092404073] [2021-07-13 20:30:47,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:47,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:47,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:47,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092404073] [2021-07-13 20:30:47,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092404073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:47,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706807626] [2021-07-13 20:30:47,893 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:47,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:30:47,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:47,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:30:47,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:48,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:48,153 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:48,153 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 23 treesize of output 31 [2021-07-13 20:30:48,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:30:48,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:48,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:48,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:48 [2021-07-13 20:30:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:48,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706807626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:48,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:48,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 20:30:48,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24371082] [2021-07-13 20:30:48,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:30:48,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:48,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:30:48,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:30:48,324 INFO L87 Difference]: Start difference. First operand 7460 states and 25491 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:50,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:50,888 INFO L93 Difference]: Finished difference Result 9693 states and 32346 transitions. [2021-07-13 20:30:50,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:30:50,889 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:50,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:50,909 INFO L225 Difference]: With dead ends: 9693 [2021-07-13 20:30:50,909 INFO L226 Difference]: Without dead ends: 9650 [2021-07-13 20:30:50,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1715.6ms TimeCoverageRelationStatistics Valid=281, Invalid=2911, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:30:50,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9650 states. [2021-07-13 20:30:51,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9650 to 7448. [2021-07-13 20:30:51,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7448 states, 7447 states have (on average 3.4157378810259167) internal successors, (25437), 7447 states have internal predecessors, (25437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:51,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7448 states to 7448 states and 25437 transitions. [2021-07-13 20:30:51,060 INFO L78 Accepts]: Start accepts. Automaton has 7448 states and 25437 transitions. Word has length 30 [2021-07-13 20:30:51,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:51,060 INFO L482 AbstractCegarLoop]: Abstraction has 7448 states and 25437 transitions. [2021-07-13 20:30:51,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:51,060 INFO L276 IsEmpty]: Start isEmpty. Operand 7448 states and 25437 transitions. [2021-07-13 20:30:51,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:51,072 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:51,072 INFO L508 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] [2021-07-13 20:30:51,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:51,272 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:51,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:51,273 INFO L82 PathProgramCache]: Analyzing trace with hash -508670674, now seen corresponding path program 103 times [2021-07-13 20:30:51,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:51,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711014455] [2021-07-13 20:30:51,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:51,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:51,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:51,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:51,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711014455] [2021-07-13 20:30:51,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711014455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:51,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266550036] [2021-07-13 20:30:51,513 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:51,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:30:51,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:51,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:51,739 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:51,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:30:51,740 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:51,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:51,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:51,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-13 20:30:51,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:51,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266550036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:51,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:51,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:30:51,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038186867] [2021-07-13 20:30:51,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:30:51,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:51,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:30:51,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:30:51,797 INFO L87 Difference]: Start difference. First operand 7448 states and 25437 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-07-13 20:30:52,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:52,620 INFO L93 Difference]: Finished difference Result 9634 states and 32382 transitions. [2021-07-13 20:30:52,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:30:52,620 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:52,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:52,640 INFO L225 Difference]: With dead ends: 9634 [2021-07-13 20:30:52,641 INFO L226 Difference]: Without dead ends: 9615 [2021-07-13 20:30:52,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 656.9ms TimeCoverageRelationStatistics Valid=165, Invalid=957, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:30:52,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9615 states. [2021-07-13 20:30:52,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9615 to 7445. [2021-07-13 20:30:52,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7445 states, 7444 states have (on average 3.415368081676518) internal successors, (25424), 7444 states have internal predecessors, (25424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:52,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7445 states to 7445 states and 25424 transitions. [2021-07-13 20:30:52,792 INFO L78 Accepts]: Start accepts. Automaton has 7445 states and 25424 transitions. Word has length 30 [2021-07-13 20:30:52,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:52,792 INFO L482 AbstractCegarLoop]: Abstraction has 7445 states and 25424 transitions. [2021-07-13 20:30:52,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-07-13 20:30:52,792 INFO L276 IsEmpty]: Start isEmpty. Operand 7445 states and 25424 transitions. [2021-07-13 20:30:52,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:52,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:52,804 INFO L508 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] [2021-07-13 20:30:53,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-07-13 20:30:53,004 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:53,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:53,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1583656386, now seen corresponding path program 104 times [2021-07-13 20:30:53,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:53,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952657272] [2021-07-13 20:30:53,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:53,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:53,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:53,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:53,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952657272] [2021-07-13 20:30:53,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952657272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:53,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782771472] [2021-07-13 20:30:53,229 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:53,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:30:53,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:53,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:30:53,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:53,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:53,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:53,411 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:53,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-07-13 20:30:53,413 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:53,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:53,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:53,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-07-13 20:30:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:53,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782771472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:53,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:53,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:30:53,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358305730] [2021-07-13 20:30:53,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:30:53,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:53,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:30:53,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:30:53,515 INFO L87 Difference]: Start difference. First operand 7445 states and 25424 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:54,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:54,613 INFO L93 Difference]: Finished difference Result 9544 states and 32087 transitions. [2021-07-13 20:30:54,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:30:54,613 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:54,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:54,633 INFO L225 Difference]: With dead ends: 9544 [2021-07-13 20:30:54,633 INFO L226 Difference]: Without dead ends: 9518 [2021-07-13 20:30:54,634 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 821.3ms TimeCoverageRelationStatistics Valid=181, Invalid=1151, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:30:54,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9518 states. [2021-07-13 20:30:54,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9518 to 7416. [2021-07-13 20:30:54,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7416 states, 7415 states have (on average 3.4163182737693862) internal successors, (25332), 7415 states have internal predecessors, (25332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:54,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7416 states to 7416 states and 25332 transitions. [2021-07-13 20:30:54,846 INFO L78 Accepts]: Start accepts. Automaton has 7416 states and 25332 transitions. Word has length 30 [2021-07-13 20:30:54,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:54,846 INFO L482 AbstractCegarLoop]: Abstraction has 7416 states and 25332 transitions. [2021-07-13 20:30:54,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:54,846 INFO L276 IsEmpty]: Start isEmpty. Operand 7416 states and 25332 transitions. [2021-07-13 20:30:54,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:54,858 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:54,858 INFO L508 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] [2021-07-13 20:30:55,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable501,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:55,059 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:55,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:55,059 INFO L82 PathProgramCache]: Analyzing trace with hash -416146950, now seen corresponding path program 105 times [2021-07-13 20:30:55,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:55,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994970207] [2021-07-13 20:30:55,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:55,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:55,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:55,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:55,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994970207] [2021-07-13 20:30:55,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994970207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:55,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026811738] [2021-07-13 20:30:55,281 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:55,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:30:55,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:55,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:30:55,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:55,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:55,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:55,506 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:55,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-07-13 20:30:55,508 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:55,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:55,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:55,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-07-13 20:30:55,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:55,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026811738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:55,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:55,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:30:55,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971735377] [2021-07-13 20:30:55,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:30:55,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:55,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:30:55,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:30:55,583 INFO L87 Difference]: Start difference. First operand 7416 states and 25332 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:57,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:57,045 INFO L93 Difference]: Finished difference Result 9828 states and 32975 transitions. [2021-07-13 20:30:57,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:30:57,045 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:57,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:57,065 INFO L225 Difference]: With dead ends: 9828 [2021-07-13 20:30:57,066 INFO L226 Difference]: Without dead ends: 9778 [2021-07-13 20:30:57,066 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1097.4ms TimeCoverageRelationStatistics Valid=290, Invalid=1780, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:30:57,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9778 states. [2021-07-13 20:30:57,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9778 to 7415. [2021-07-13 20:30:57,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7415 states, 7414 states have (on average 3.4136768276234153) internal successors, (25309), 7414 states have internal predecessors, (25309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:57,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7415 states to 7415 states and 25309 transitions. [2021-07-13 20:30:57,200 INFO L78 Accepts]: Start accepts. Automaton has 7415 states and 25309 transitions. Word has length 30 [2021-07-13 20:30:57,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:57,200 INFO L482 AbstractCegarLoop]: Abstraction has 7415 states and 25309 transitions. [2021-07-13 20:30:57,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:57,201 INFO L276 IsEmpty]: Start isEmpty. Operand 7415 states and 25309 transitions. [2021-07-13 20:30:57,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:57,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:57,211 INFO L508 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] [2021-07-13 20:30:57,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:57,412 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:57,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:57,412 INFO L82 PathProgramCache]: Analyzing trace with hash 519931620, now seen corresponding path program 106 times [2021-07-13 20:30:57,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:57,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664210803] [2021-07-13 20:30:57,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:57,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:57,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:57,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664210803] [2021-07-13 20:30:57,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664210803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:57,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066676789] [2021-07-13 20:30:57,613 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:57,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:30:57,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:57,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:30:57,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:57,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:57,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:57,943 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 19 treesize of output 11 [2021-07-13 20:30:57,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:57,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:57,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:57,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:30:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:57,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066676789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:57,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:57,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:30:57,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427039006] [2021-07-13 20:30:57,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:30:57,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:57,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:30:57,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:30:57,969 INFO L87 Difference]: Start difference. First operand 7415 states and 25309 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:58,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:58,699 INFO L93 Difference]: Finished difference Result 9105 states and 30683 transitions. [2021-07-13 20:30:58,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:30:58,699 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:30:58,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:58,718 INFO L225 Difference]: With dead ends: 9105 [2021-07-13 20:30:58,719 INFO L226 Difference]: Without dead ends: 9083 [2021-07-13 20:30:58,719 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 618.2ms TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:30:58,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9083 states. [2021-07-13 20:30:58,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9083 to 7434. [2021-07-13 20:30:58,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7434 states, 7433 states have (on average 3.4138302166016414) internal successors, (25375), 7433 states have internal predecessors, (25375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:58,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7434 states to 7434 states and 25375 transitions. [2021-07-13 20:30:58,855 INFO L78 Accepts]: Start accepts. Automaton has 7434 states and 25375 transitions. Word has length 30 [2021-07-13 20:30:58,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:58,855 INFO L482 AbstractCegarLoop]: Abstraction has 7434 states and 25375 transitions. [2021-07-13 20:30:58,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:58,855 INFO L276 IsEmpty]: Start isEmpty. Operand 7434 states and 25375 transitions. [2021-07-13 20:30:58,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:30:58,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:58,867 INFO L508 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] [2021-07-13 20:30:59,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable505 [2021-07-13 20:30:59,067 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:59,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:59,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1969487540, now seen corresponding path program 107 times [2021-07-13 20:30:59,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:59,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443827016] [2021-07-13 20:30:59,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:59,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:59,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:59,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:59,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443827016] [2021-07-13 20:30:59,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443827016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:59,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517334907] [2021-07-13 20:30:59,270 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:59,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:30:59,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:59,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:30:59,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:59,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:59,504 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:59,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:30:59,506 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:59,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:59,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:59,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-13 20:30:59,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:59,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517334907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:59,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:59,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:30:59,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258423632] [2021-07-13 20:30:59,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:30:59,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:59,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:30:59,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:30:59,564 INFO L87 Difference]: Start difference. First operand 7434 states and 25375 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:00,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:00,685 INFO L93 Difference]: Finished difference Result 9842 states and 33046 transitions. [2021-07-13 20:31:00,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:31:00,685 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:31:00,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:00,706 INFO L225 Difference]: With dead ends: 9842 [2021-07-13 20:31:00,706 INFO L226 Difference]: Without dead ends: 9816 [2021-07-13 20:31:00,706 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 826.7ms TimeCoverageRelationStatistics Valid=263, Invalid=1459, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:31:00,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9816 states. [2021-07-13 20:31:00,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9816 to 7432. [2021-07-13 20:31:00,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7432 states, 7431 states have (on average 3.4128650248957073) internal successors, (25361), 7431 states have internal predecessors, (25361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:00,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7432 states to 7432 states and 25361 transitions. [2021-07-13 20:31:00,854 INFO L78 Accepts]: Start accepts. Automaton has 7432 states and 25361 transitions. Word has length 30 [2021-07-13 20:31:00,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:00,854 INFO L482 AbstractCegarLoop]: Abstraction has 7432 states and 25361 transitions. [2021-07-13 20:31:00,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:00,854 INFO L276 IsEmpty]: Start isEmpty. Operand 7432 states and 25361 transitions. [2021-07-13 20:31:00,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:31:00,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:00,865 INFO L508 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] [2021-07-13 20:31:01,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:01,066 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:01,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:01,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1689012902, now seen corresponding path program 108 times [2021-07-13 20:31:01,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:01,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756220522] [2021-07-13 20:31:01,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:01,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:01,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:01,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756220522] [2021-07-13 20:31:01,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756220522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:01,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82026891] [2021-07-13 20:31:01,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:01,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:31:01,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:01,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:31:01,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:01,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:01,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:01,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:01,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-07-13 20:31:01,446 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:31:01,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:01,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:01,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-07-13 20:31:01,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:01,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82026891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:01,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:01,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:31:01,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266916399] [2021-07-13 20:31:01,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:31:01,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:01,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:31:01,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:31:01,522 INFO L87 Difference]: Start difference. First operand 7432 states and 25361 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:02,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:02,977 INFO L93 Difference]: Finished difference Result 9757 states and 32809 transitions. [2021-07-13 20:31:02,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:31:02,977 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:31:02,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:02,997 INFO L225 Difference]: With dead ends: 9757 [2021-07-13 20:31:02,997 INFO L226 Difference]: Without dead ends: 9713 [2021-07-13 20:31:02,998 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1044.4ms TimeCoverageRelationStatistics Valid=308, Invalid=1854, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:31:03,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9713 states. [2021-07-13 20:31:03,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9713 to 7399. [2021-07-13 20:31:03,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7399 states, 7398 states have (on average 3.4138956474722897) internal successors, (25256), 7398 states have internal predecessors, (25256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:03,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7399 states to 7399 states and 25256 transitions. [2021-07-13 20:31:03,173 INFO L78 Accepts]: Start accepts. Automaton has 7399 states and 25256 transitions. Word has length 30 [2021-07-13 20:31:03,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:03,173 INFO L482 AbstractCegarLoop]: Abstraction has 7399 states and 25256 transitions. [2021-07-13 20:31:03,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:03,174 INFO L276 IsEmpty]: Start isEmpty. Operand 7399 states and 25256 transitions. [2021-07-13 20:31:03,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:31:03,184 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:03,184 INFO L508 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] [2021-07-13 20:31:03,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:03,385 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:03,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:03,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1746001132, now seen corresponding path program 109 times [2021-07-13 20:31:03,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:03,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019162957] [2021-07-13 20:31:03,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:03,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:03,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:03,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019162957] [2021-07-13 20:31:03,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019162957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:03,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078496021] [2021-07-13 20:31:03,610 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:03,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:31:03,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:03,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:03,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:03,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:31:03,824 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:31:03,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:03,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:03,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-07-13 20:31:03,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:03,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078496021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:03,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:03,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:31:03,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217271833] [2021-07-13 20:31:03,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:31:03,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:03,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:31:03,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:31:03,915 INFO L87 Difference]: Start difference. First operand 7399 states and 25256 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:04,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:04,854 INFO L93 Difference]: Finished difference Result 9549 states and 32090 transitions. [2021-07-13 20:31:04,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:31:04,854 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:31:04,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:04,879 INFO L225 Difference]: With dead ends: 9549 [2021-07-13 20:31:04,879 INFO L226 Difference]: Without dead ends: 9511 [2021-07-13 20:31:04,879 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 710.6ms TimeCoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:31:04,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9511 states. [2021-07-13 20:31:04,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9511 to 7411. [2021-07-13 20:31:05,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7411 states, 7410 states have (on average 3.414574898785425) internal successors, (25302), 7410 states have internal predecessors, (25302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:05,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7411 states to 7411 states and 25302 transitions. [2021-07-13 20:31:05,021 INFO L78 Accepts]: Start accepts. Automaton has 7411 states and 25302 transitions. Word has length 30 [2021-07-13 20:31:05,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:05,021 INFO L482 AbstractCegarLoop]: Abstraction has 7411 states and 25302 transitions. [2021-07-13 20:31:05,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:05,021 INFO L276 IsEmpty]: Start isEmpty. Operand 7411 states and 25302 transitions. [2021-07-13 20:31:05,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:31:05,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:05,033 INFO L508 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] [2021-07-13 20:31:05,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable511,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:05,234 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:05,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:05,234 INFO L82 PathProgramCache]: Analyzing trace with hash 298416662, now seen corresponding path program 110 times [2021-07-13 20:31:05,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:05,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332748167] [2021-07-13 20:31:05,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:05,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:05,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332748167] [2021-07-13 20:31:05,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332748167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:05,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855226863] [2021-07-13 20:31:05,503 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:05,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:31:05,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:05,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:31:05,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:05,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:05,732 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 19 treesize of output 11 [2021-07-13 20:31:05,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:05,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:05,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:05,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:7 [2021-07-13 20:31:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:05,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855226863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:05,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:05,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:31:05,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467378838] [2021-07-13 20:31:05,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:31:05,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:05,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:31:05,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:31:05,778 INFO L87 Difference]: Start difference. First operand 7411 states and 25302 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:07,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:07,004 INFO L93 Difference]: Finished difference Result 9078 states and 30424 transitions. [2021-07-13 20:31:07,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:31:07,004 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:31:07,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:07,022 INFO L225 Difference]: With dead ends: 9078 [2021-07-13 20:31:07,022 INFO L226 Difference]: Without dead ends: 9045 [2021-07-13 20:31:07,022 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1009.7ms TimeCoverageRelationStatistics Valid=277, Invalid=1529, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:31:07,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9045 states. [2021-07-13 20:31:07,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9045 to 7438. [2021-07-13 20:31:07,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7438 states, 7437 states have (on average 3.412800860562055) internal successors, (25381), 7437 states have internal predecessors, (25381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:07,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7438 states to 7438 states and 25381 transitions. [2021-07-13 20:31:07,148 INFO L78 Accepts]: Start accepts. Automaton has 7438 states and 25381 transitions. Word has length 30 [2021-07-13 20:31:07,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:07,148 INFO L482 AbstractCegarLoop]: Abstraction has 7438 states and 25381 transitions. [2021-07-13 20:31:07,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:07,148 INFO L276 IsEmpty]: Start isEmpty. Operand 7438 states and 25381 transitions. [2021-07-13 20:31:07,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:31:07,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:07,159 INFO L508 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] [2021-07-13 20:31:07,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-07-13 20:31:07,359 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:07,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:07,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1937279850, now seen corresponding path program 111 times [2021-07-13 20:31:07,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:07,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830877051] [2021-07-13 20:31:07,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:07,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:07,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:07,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830877051] [2021-07-13 20:31:07,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830877051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:07,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901118180] [2021-07-13 20:31:07,634 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:07,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:31:07,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:07,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:31:07,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:07,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:07,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:07,860 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 19 treesize of output 11 [2021-07-13 20:31:07,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:07,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:07,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:07,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:31:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:07,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901118180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:07,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:07,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:31:07,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185492271] [2021-07-13 20:31:07,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:31:07,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:07,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:31:07,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:31:07,891 INFO L87 Difference]: Start difference. First operand 7438 states and 25381 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:09,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:09,788 INFO L93 Difference]: Finished difference Result 9393 states and 31341 transitions. [2021-07-13 20:31:09,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:31:09,789 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:31:09,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:09,808 INFO L225 Difference]: With dead ends: 9393 [2021-07-13 20:31:09,808 INFO L226 Difference]: Without dead ends: 9360 [2021-07-13 20:31:09,809 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1355.0ms TimeCoverageRelationStatistics Valid=311, Invalid=2041, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:31:09,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9360 states. [2021-07-13 20:31:09,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9360 to 7433. [2021-07-13 20:31:09,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7433 states, 7432 states have (on average 3.4122712594187297) internal successors, (25360), 7432 states have internal predecessors, (25360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:09,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7433 states to 7433 states and 25360 transitions. [2021-07-13 20:31:09,948 INFO L78 Accepts]: Start accepts. Automaton has 7433 states and 25360 transitions. Word has length 30 [2021-07-13 20:31:09,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:09,948 INFO L482 AbstractCegarLoop]: Abstraction has 7433 states and 25360 transitions. [2021-07-13 20:31:09,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:09,948 INFO L276 IsEmpty]: Start isEmpty. Operand 7433 states and 25360 transitions. [2021-07-13 20:31:09,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:31:09,960 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:09,960 INFO L508 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] [2021-07-13 20:31:10,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:10,161 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:10,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:10,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1168264038, now seen corresponding path program 112 times [2021-07-13 20:31:10,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:10,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481806858] [2021-07-13 20:31:10,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:10,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:10,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:10,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:10,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481806858] [2021-07-13 20:31:10,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481806858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:10,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898653530] [2021-07-13 20:31:10,408 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:10,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:31:10,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:10,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:31:10,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:10,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:10,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:10,647 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 19 treesize of output 11 [2021-07-13 20:31:10,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:10,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:10,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:10,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:31:10,676 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:10,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898653530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:10,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:10,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 20:31:10,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993554962] [2021-07-13 20:31:10,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:31:10,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:10,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:31:10,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:31:10,677 INFO L87 Difference]: Start difference. First operand 7433 states and 25360 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:11,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:11,145 INFO L93 Difference]: Finished difference Result 7974 states and 26897 transitions. [2021-07-13 20:31:11,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:31:11,146 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:31:11,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:11,162 INFO L225 Difference]: With dead ends: 7974 [2021-07-13 20:31:11,162 INFO L226 Difference]: Without dead ends: 7948 [2021-07-13 20:31:11,162 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 545.5ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:31:11,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7948 states. [2021-07-13 20:31:11,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7948 to 7410. [2021-07-13 20:31:11,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7410 states, 7409 states have (on average 3.4130112025914427) internal successors, (25287), 7409 states have internal predecessors, (25287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:11,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7410 states to 7410 states and 25287 transitions. [2021-07-13 20:31:11,336 INFO L78 Accepts]: Start accepts. Automaton has 7410 states and 25287 transitions. Word has length 30 [2021-07-13 20:31:11,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:11,336 INFO L482 AbstractCegarLoop]: Abstraction has 7410 states and 25287 transitions. [2021-07-13 20:31:11,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:11,336 INFO L276 IsEmpty]: Start isEmpty. Operand 7410 states and 25287 transitions. [2021-07-13 20:31:11,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:31:11,347 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:11,347 INFO L508 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] [2021-07-13 20:31:11,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:11,548 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:11,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:11,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1252420240, now seen corresponding path program 113 times [2021-07-13 20:31:11,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:11,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030934769] [2021-07-13 20:31:11,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:11,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:11,773 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:11,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:11,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030934769] [2021-07-13 20:31:11,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030934769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:11,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517967509] [2021-07-13 20:31:11,773 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:11,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:31:11,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:11,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:31:11,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:12,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:12,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:12,018 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 19 treesize of output 11 [2021-07-13 20:31:12,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:12,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:12,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:12,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:31:12,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:12,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517967509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:12,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:12,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-07-13 20:31:12,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533649446] [2021-07-13 20:31:12,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:31:12,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:12,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:31:12,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:31:12,042 INFO L87 Difference]: Start difference. First operand 7410 states and 25287 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2021-07-13 20:31:13,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:13,538 INFO L93 Difference]: Finished difference Result 9196 states and 30718 transitions. [2021-07-13 20:31:13,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:31:13,538 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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 30 [2021-07-13 20:31:13,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:13,557 INFO L225 Difference]: With dead ends: 9196 [2021-07-13 20:31:13,558 INFO L226 Difference]: Without dead ends: 9170 [2021-07-13 20:31:13,558 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1035.0ms TimeCoverageRelationStatistics Valid=309, Invalid=1853, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:31:13,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9170 states. [2021-07-13 20:31:13,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9170 to 7390. [2021-07-13 20:31:13,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7390 states, 7389 states have (on average 3.4141291108404386) internal successors, (25227), 7389 states have internal predecessors, (25227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:13,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7390 states to 7390 states and 25227 transitions. [2021-07-13 20:31:13,695 INFO L78 Accepts]: Start accepts. Automaton has 7390 states and 25227 transitions. Word has length 30 [2021-07-13 20:31:13,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:13,695 INFO L482 AbstractCegarLoop]: Abstraction has 7390 states and 25227 transitions. [2021-07-13 20:31:13,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2021-07-13 20:31:13,695 INFO L276 IsEmpty]: Start isEmpty. Operand 7390 states and 25227 transitions. [2021-07-13 20:31:13,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:31:13,707 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:13,707 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:13,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable517 [2021-07-13 20:31:13,907 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:13,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:13,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1782395603, now seen corresponding path program 34 times [2021-07-13 20:31:13,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:13,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042694610] [2021-07-13 20:31:13,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:13,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:13,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:13,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042694610] [2021-07-13 20:31:13,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042694610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:13,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139661378] [2021-07-13 20:31:13,996 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:14,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:31:14,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:14,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:31:14,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:14,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 20:31:14,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:14,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:14,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:14,193 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-13 20:31:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:14,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139661378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:14,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:14,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:31:14,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838191934] [2021-07-13 20:31:14,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:31:14,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:14,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:31:14,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:31:14,213 INFO L87 Difference]: Start difference. First operand 7390 states and 25227 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:14,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:14,422 INFO L93 Difference]: Finished difference Result 8178 states and 27562 transitions. [2021-07-13 20:31:14,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:31:14,422 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:31:14,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:14,439 INFO L225 Difference]: With dead ends: 8178 [2021-07-13 20:31:14,439 INFO L226 Difference]: Without dead ends: 8092 [2021-07-13 20:31:14,439 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 243.0ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:31:14,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8092 states. [2021-07-13 20:31:14,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8092 to 7410. [2021-07-13 20:31:14,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7410 states, 7409 states have (on average 3.4105817249291404) internal successors, (25269), 7409 states have internal predecessors, (25269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:14,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7410 states to 7410 states and 25269 transitions. [2021-07-13 20:31:14,566 INFO L78 Accepts]: Start accepts. Automaton has 7410 states and 25269 transitions. Word has length 30 [2021-07-13 20:31:14,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:14,566 INFO L482 AbstractCegarLoop]: Abstraction has 7410 states and 25269 transitions. [2021-07-13 20:31:14,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:14,566 INFO L276 IsEmpty]: Start isEmpty. Operand 7410 states and 25269 transitions. [2021-07-13 20:31:14,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:31:14,578 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:14,578 INFO L508 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] [2021-07-13 20:31:14,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:14,778 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:14,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:14,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1423069146, now seen corresponding path program 114 times [2021-07-13 20:31:14,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:14,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260078964] [2021-07-13 20:31:14,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:15,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:15,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260078964] [2021-07-13 20:31:15,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260078964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:15,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908955654] [2021-07-13 20:31:15,012 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:15,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:31:15,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:15,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:31:15,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:15,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:15,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:15,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:31:15,237 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:31:15,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:15,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:15,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-13 20:31:15,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:15,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908955654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:15,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:15,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-07-13 20:31:15,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879386420] [2021-07-13 20:31:15,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:31:15,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:15,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:31:15,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:31:15,292 INFO L87 Difference]: Start difference. First operand 7410 states and 25269 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2021-07-13 20:31:17,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:17,827 INFO L93 Difference]: Finished difference Result 11711 states and 38605 transitions. [2021-07-13 20:31:17,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:31:17,827 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 30 [2021-07-13 20:31:17,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:17,852 INFO L225 Difference]: With dead ends: 11711 [2021-07-13 20:31:17,852 INFO L226 Difference]: Without dead ends: 11656 [2021-07-13 20:31:17,853 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 1807.7ms TimeCoverageRelationStatistics Valid=582, Invalid=4530, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:31:17,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11656 states. [2021-07-13 20:31:17,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11656 to 7487. [2021-07-13 20:31:18,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7487 states, 7486 states have (on average 3.41170184344109) internal successors, (25540), 7486 states have internal predecessors, (25540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:18,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7487 states to 7487 states and 25540 transitions. [2021-07-13 20:31:18,022 INFO L78 Accepts]: Start accepts. Automaton has 7487 states and 25540 transitions. Word has length 30 [2021-07-13 20:31:18,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:18,022 INFO L482 AbstractCegarLoop]: Abstraction has 7487 states and 25540 transitions. [2021-07-13 20:31:18,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2021-07-13 20:31:18,023 INFO L276 IsEmpty]: Start isEmpty. Operand 7487 states and 25540 transitions. [2021-07-13 20:31:18,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:31:18,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:18,035 INFO L508 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] [2021-07-13 20:31:18,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:18,236 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:18,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:18,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1640634574, now seen corresponding path program 115 times [2021-07-13 20:31:18,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:18,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434101523] [2021-07-13 20:31:18,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:18,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:18,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:18,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:18,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434101523] [2021-07-13 20:31:18,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434101523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:18,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539461033] [2021-07-13 20:31:18,502 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:18,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:31:18,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:18,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:18,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:18,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:31:18,704 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:31:18,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:18,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:18,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-13 20:31:18,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:18,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539461033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:18,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:18,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:31:18,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750668253] [2021-07-13 20:31:18,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:31:18,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:18,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:31:18,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:31:18,758 INFO L87 Difference]: Start difference. First operand 7487 states and 25540 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:20,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:20,480 INFO L93 Difference]: Finished difference Result 10792 states and 35822 transitions. [2021-07-13 20:31:20,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:31:20,481 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:31:20,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:20,505 INFO L225 Difference]: With dead ends: 10792 [2021-07-13 20:31:20,505 INFO L226 Difference]: Without dead ends: 10735 [2021-07-13 20:31:20,505 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1432.8ms TimeCoverageRelationStatistics Valid=378, Invalid=2072, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:31:20,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10735 states. [2021-07-13 20:31:20,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10735 to 7475. [2021-07-13 20:31:20,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7475 states, 7474 states have (on average 3.409017928819909) internal successors, (25479), 7474 states have internal predecessors, (25479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:20,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7475 states to 7475 states and 25479 transitions. [2021-07-13 20:31:20,669 INFO L78 Accepts]: Start accepts. Automaton has 7475 states and 25479 transitions. Word has length 30 [2021-07-13 20:31:20,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:20,669 INFO L482 AbstractCegarLoop]: Abstraction has 7475 states and 25479 transitions. [2021-07-13 20:31:20,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:20,669 INFO L276 IsEmpty]: Start isEmpty. Operand 7475 states and 25479 transitions. [2021-07-13 20:31:20,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:31:20,682 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:20,682 INFO L508 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] [2021-07-13 20:31:20,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:20,882 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:20,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:20,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1876404162, now seen corresponding path program 116 times [2021-07-13 20:31:20,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:20,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027521472] [2021-07-13 20:31:20,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:20,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:21,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:21,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027521472] [2021-07-13 20:31:21,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027521472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:21,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781496536] [2021-07-13 20:31:21,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:21,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:31:21,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:21,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:31:21,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:21,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:21,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:31:21,317 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:31:21,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:21,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:21,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-07-13 20:31:21,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:21,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781496536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:21,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:21,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:31:21,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025983638] [2021-07-13 20:31:21,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:31:21,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:21,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:31:21,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:31:21,407 INFO L87 Difference]: Start difference. First operand 7475 states and 25479 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:22,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:22,427 INFO L93 Difference]: Finished difference Result 9562 states and 32103 transitions. [2021-07-13 20:31:22,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:31:22,427 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:31:22,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:22,486 INFO L225 Difference]: With dead ends: 9562 [2021-07-13 20:31:22,487 INFO L226 Difference]: Without dead ends: 9491 [2021-07-13 20:31:22,487 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 813.5ms TimeCoverageRelationStatistics Valid=215, Invalid=1345, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:31:22,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9491 states. [2021-07-13 20:31:22,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9491 to 7458. [2021-07-13 20:31:22,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7458 states, 7457 states have (on average 3.408072951589111) internal successors, (25414), 7457 states have internal predecessors, (25414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:22,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7458 states to 7458 states and 25414 transitions. [2021-07-13 20:31:22,611 INFO L78 Accepts]: Start accepts. Automaton has 7458 states and 25414 transitions. Word has length 30 [2021-07-13 20:31:22,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:22,611 INFO L482 AbstractCegarLoop]: Abstraction has 7458 states and 25414 transitions. [2021-07-13 20:31:22,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:22,611 INFO L276 IsEmpty]: Start isEmpty. Operand 7458 states and 25414 transitions. [2021-07-13 20:31:22,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:31:22,623 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:22,623 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:22,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable524 [2021-07-13 20:31:22,824 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:22,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:22,824 INFO L82 PathProgramCache]: Analyzing trace with hash 54174113, now seen corresponding path program 35 times [2021-07-13 20:31:22,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:22,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736289161] [2021-07-13 20:31:22,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:22,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:22,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736289161] [2021-07-13 20:31:22,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736289161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:22,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142740429] [2021-07-13 20:31:22,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:22,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:31:22,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:22,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:31:22,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:23,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 20:31:23,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:23,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:23,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:23,085 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-13 20:31:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:23,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142740429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:23,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:23,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:31:23,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221301191] [2021-07-13 20:31:23,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:31:23,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:23,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:31:23,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:31:23,109 INFO L87 Difference]: Start difference. First operand 7458 states and 25414 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:23,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:23,300 INFO L93 Difference]: Finished difference Result 7805 states and 26445 transitions. [2021-07-13 20:31:23,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:31:23,300 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:31:23,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:23,314 INFO L225 Difference]: With dead ends: 7805 [2021-07-13 20:31:23,314 INFO L226 Difference]: Without dead ends: 7774 [2021-07-13 20:31:23,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 206.0ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:31:23,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7774 states. [2021-07-13 20:31:23,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7774 to 7430. [2021-07-13 20:31:23,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.4109570601696055) internal successors, (25340), 7429 states have internal predecessors, (25340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:23,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 25340 transitions. [2021-07-13 20:31:23,428 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 25340 transitions. Word has length 30 [2021-07-13 20:31:23,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:23,428 INFO L482 AbstractCegarLoop]: Abstraction has 7430 states and 25340 transitions. [2021-07-13 20:31:23,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:23,428 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 25340 transitions. [2021-07-13 20:31:23,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:31:23,440 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:23,440 INFO L508 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] [2021-07-13 20:31:23,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:23,641 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:23,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:23,641 INFO L82 PathProgramCache]: Analyzing trace with hash -2093501780, now seen corresponding path program 117 times [2021-07-13 20:31:23,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:23,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305739669] [2021-07-13 20:31:23,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:23,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:23,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305739669] [2021-07-13 20:31:23,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305739669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:23,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927470837] [2021-07-13 20:31:23,909 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:23,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:31:23,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:23,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:31:23,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:24,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:24,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:24,138 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 19 treesize of output 11 [2021-07-13 20:31:24,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:24,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:24,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:24,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:31:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:24,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927470837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:24,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:24,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-07-13 20:31:24,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097386386] [2021-07-13 20:31:24,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:31:24,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:24,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:31:24,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:31:24,165 INFO L87 Difference]: Start difference. First operand 7430 states and 25340 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:25,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:25,214 INFO L93 Difference]: Finished difference Result 9193 states and 30704 transitions. [2021-07-13 20:31:25,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:31:25,215 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:31:25,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:25,233 INFO L225 Difference]: With dead ends: 9193 [2021-07-13 20:31:25,234 INFO L226 Difference]: Without dead ends: 9160 [2021-07-13 20:31:25,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 944.3ms TimeCoverageRelationStatistics Valid=278, Invalid=1444, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:31:25,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9160 states. [2021-07-13 20:31:25,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9160 to 7443. [2021-07-13 20:31:25,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7443 states, 7442 states have (on average 3.4106423004568662) internal successors, (25382), 7442 states have internal predecessors, (25382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:25,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7443 states to 7443 states and 25382 transitions. [2021-07-13 20:31:25,366 INFO L78 Accepts]: Start accepts. Automaton has 7443 states and 25382 transitions. Word has length 30 [2021-07-13 20:31:25,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:25,366 INFO L482 AbstractCegarLoop]: Abstraction has 7443 states and 25382 transitions. [2021-07-13 20:31:25,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:25,366 INFO L276 IsEmpty]: Start isEmpty. Operand 7443 states and 25382 transitions. [2021-07-13 20:31:25,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:31:25,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:25,377 INFO L508 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] [2021-07-13 20:31:25,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:25,578 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:25,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:25,578 INFO L82 PathProgramCache]: Analyzing trace with hash 769171052, now seen corresponding path program 118 times [2021-07-13 20:31:25,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:25,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261154075] [2021-07-13 20:31:25,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:25,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:25,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261154075] [2021-07-13 20:31:25,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261154075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:25,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069737562] [2021-07-13 20:31:25,830 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:25,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:31:25,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:25,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:31:25,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:26,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:26,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:26,072 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 19 treesize of output 11 [2021-07-13 20:31:26,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:26,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:26,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:26,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:31:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:26,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069737562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:26,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:26,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:31:26,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061392999] [2021-07-13 20:31:26,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:31:26,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:26,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:31:26,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:31:26,100 INFO L87 Difference]: Start difference. First operand 7443 states and 25382 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 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) [2021-07-13 20:31:27,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:27,904 INFO L93 Difference]: Finished difference Result 9705 states and 32422 transitions. [2021-07-13 20:31:27,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:31:27,904 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 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 30 [2021-07-13 20:31:27,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:27,924 INFO L225 Difference]: With dead ends: 9705 [2021-07-13 20:31:27,924 INFO L226 Difference]: Without dead ends: 9672 [2021-07-13 20:31:27,925 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1388.8ms TimeCoverageRelationStatistics Valid=470, Invalid=2392, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:31:27,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9672 states. [2021-07-13 20:31:28,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9672 to 7455. [2021-07-13 20:31:28,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7455 states, 7454 states have (on average 3.4097129058223774) internal successors, (25416), 7454 states have internal predecessors, (25416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:28,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7455 states to 7455 states and 25416 transitions. [2021-07-13 20:31:28,065 INFO L78 Accepts]: Start accepts. Automaton has 7455 states and 25416 transitions. Word has length 30 [2021-07-13 20:31:28,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:28,066 INFO L482 AbstractCegarLoop]: Abstraction has 7455 states and 25416 transitions. [2021-07-13 20:31:28,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 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) [2021-07-13 20:31:28,066 INFO L276 IsEmpty]: Start isEmpty. Operand 7455 states and 25416 transitions. [2021-07-13 20:31:28,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:31:28,077 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:28,077 INFO L508 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] [2021-07-13 20:31:28,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable528 [2021-07-13 20:31:28,279 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:28,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:28,280 INFO L82 PathProgramCache]: Analyzing trace with hash 2080023144, now seen corresponding path program 119 times [2021-07-13 20:31:28,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:28,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257071272] [2021-07-13 20:31:28,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:28,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:28,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257071272] [2021-07-13 20:31:28,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257071272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:28,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397573587] [2021-07-13 20:31:28,536 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:28,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:31:28,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:28,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:31:28,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:28,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:28,768 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 19 treesize of output 27 [2021-07-13 20:31:28,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:31:28,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:28,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:28,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:35 [2021-07-13 20:31:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:28,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397573587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:28,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:28,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-07-13 20:31:28,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940881786] [2021-07-13 20:31:28,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:31:28,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:28,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:31:28,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:31:28,867 INFO L87 Difference]: Start difference. First operand 7455 states and 25416 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:31,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:31,085 INFO L93 Difference]: Finished difference Result 10824 states and 35717 transitions. [2021-07-13 20:31:31,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:31:31,085 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:31:31,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:31,109 INFO L225 Difference]: With dead ends: 10824 [2021-07-13 20:31:31,110 INFO L226 Difference]: Without dead ends: 10757 [2021-07-13 20:31:31,110 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 1685.8ms TimeCoverageRelationStatistics Valid=469, Invalid=3191, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:31:31,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10757 states. [2021-07-13 20:31:31,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10757 to 7452. [2021-07-13 20:31:31,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7452 states, 7451 states have (on average 3.410146289088713) internal successors, (25409), 7451 states have internal predecessors, (25409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:31,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7452 states to 7452 states and 25409 transitions. [2021-07-13 20:31:31,260 INFO L78 Accepts]: Start accepts. Automaton has 7452 states and 25409 transitions. Word has length 30 [2021-07-13 20:31:31,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:31,260 INFO L482 AbstractCegarLoop]: Abstraction has 7452 states and 25409 transitions. [2021-07-13 20:31:31,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:31,261 INFO L276 IsEmpty]: Start isEmpty. Operand 7452 states and 25409 transitions. [2021-07-13 20:31:31,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:31:31,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:31,272 INFO L508 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] [2021-07-13 20:31:31,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:31,473 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:31,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:31,473 INFO L82 PathProgramCache]: Analyzing trace with hash 169988712, now seen corresponding path program 120 times [2021-07-13 20:31:31,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:31,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052745965] [2021-07-13 20:31:31,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:31,740 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:31,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:31,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052745965] [2021-07-13 20:31:31,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052745965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:31,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643577172] [2021-07-13 20:31:31,740 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:31,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:31:31,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:31,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:31:31,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:31,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:31,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:31:31,975 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:31:31,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:31,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:31,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-13 20:31:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:32,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643577172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:32,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:32,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-07-13 20:31:32,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360185608] [2021-07-13 20:31:32,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:31:32,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:32,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:31:32,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:31:32,032 INFO L87 Difference]: Start difference. First operand 7452 states and 25409 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:35,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:35,510 INFO L93 Difference]: Finished difference Result 11741 states and 38704 transitions. [2021-07-13 20:31:35,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-07-13 20:31:35,510 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:31:35,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:35,541 INFO L225 Difference]: With dead ends: 11741 [2021-07-13 20:31:35,542 INFO L226 Difference]: Without dead ends: 11682 [2021-07-13 20:31:35,542 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2537 ImplicationChecksByTransitivity, 2901.3ms TimeCoverageRelationStatistics Valid=1148, Invalid=6508, Unknown=0, NotChecked=0, Total=7656 [2021-07-13 20:31:35,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11682 states. [2021-07-13 20:31:35,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11682 to 7513. [2021-07-13 20:31:35,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7513 states, 7512 states have (on average 3.413738019169329) internal successors, (25644), 7512 states have internal predecessors, (25644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:35,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7513 states to 7513 states and 25644 transitions. [2021-07-13 20:31:35,725 INFO L78 Accepts]: Start accepts. Automaton has 7513 states and 25644 transitions. Word has length 30 [2021-07-13 20:31:35,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:35,725 INFO L482 AbstractCegarLoop]: Abstraction has 7513 states and 25644 transitions. [2021-07-13 20:31:35,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:35,725 INFO L276 IsEmpty]: Start isEmpty. Operand 7513 states and 25644 transitions. [2021-07-13 20:31:35,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:31:35,737 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:35,737 INFO L508 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] [2021-07-13 20:31:35,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-07-13 20:31:35,938 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:35,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:35,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1544008528, now seen corresponding path program 121 times [2021-07-13 20:31:35,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:35,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474879310] [2021-07-13 20:31:35,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:36,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:36,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474879310] [2021-07-13 20:31:36,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474879310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:36,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104008019] [2021-07-13 20:31:36,160 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:36,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:31:36,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:36,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:36,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:36,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:36,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-07-13 20:31:36,353 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:31:36,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:36,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:36,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-07-13 20:31:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:36,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104008019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:36,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:36,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:31:36,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104115635] [2021-07-13 20:31:36,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:31:36,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:36,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:31:36,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:31:36,474 INFO L87 Difference]: Start difference. First operand 7513 states and 25644 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:37,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:37,831 INFO L93 Difference]: Finished difference Result 11967 states and 39772 transitions. [2021-07-13 20:31:37,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:31:37,832 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:31:37,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:37,861 INFO L225 Difference]: With dead ends: 11967 [2021-07-13 20:31:37,861 INFO L226 Difference]: Without dead ends: 11882 [2021-07-13 20:31:37,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1059.8ms TimeCoverageRelationStatistics Valid=437, Invalid=1725, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:31:37,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11882 states. [2021-07-13 20:31:38,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11882 to 7506. [2021-07-13 20:31:38,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7506 states, 7505 states have (on average 3.4131912058627583) internal successors, (25616), 7505 states have internal predecessors, (25616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:38,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7506 states to 7506 states and 25616 transitions. [2021-07-13 20:31:38,039 INFO L78 Accepts]: Start accepts. Automaton has 7506 states and 25616 transitions. Word has length 30 [2021-07-13 20:31:38,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:38,039 INFO L482 AbstractCegarLoop]: Abstraction has 7506 states and 25616 transitions. [2021-07-13 20:31:38,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:38,039 INFO L276 IsEmpty]: Start isEmpty. Operand 7506 states and 25616 transitions. [2021-07-13 20:31:38,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:31:38,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:38,051 INFO L508 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] [2021-07-13 20:31:38,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:38,252 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:38,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:38,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1726792916, now seen corresponding path program 122 times [2021-07-13 20:31:38,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:38,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122992113] [2021-07-13 20:31:38,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:38,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:38,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:38,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122992113] [2021-07-13 20:31:38,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122992113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:38,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566082834] [2021-07-13 20:31:38,462 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:38,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:31:38,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:38,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:31:38,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:38,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:38,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:38,665 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:38,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-07-13 20:31:38,666 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:31:38,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:38,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:38,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:20 [2021-07-13 20:31:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:38,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566082834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:38,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:38,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:31:38,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521816697] [2021-07-13 20:31:38,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:31:38,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:38,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:31:38,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:31:38,743 INFO L87 Difference]: Start difference. First operand 7506 states and 25616 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2021-07-13 20:31:41,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:41,253 INFO L93 Difference]: Finished difference Result 12586 states and 41642 transitions. [2021-07-13 20:31:41,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:31:41,253 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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 30 [2021-07-13 20:31:41,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:41,281 INFO L225 Difference]: With dead ends: 12586 [2021-07-13 20:31:41,281 INFO L226 Difference]: Without dead ends: 12498 [2021-07-13 20:31:41,282 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 2019.8ms TimeCoverageRelationStatistics Valid=829, Invalid=4001, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:31:41,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12498 states. [2021-07-13 20:31:41,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12498 to 7581. [2021-07-13 20:31:41,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7581 states, 7580 states have (on average 3.4108179419525064) internal successors, (25854), 7580 states have internal predecessors, (25854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:41,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7581 states to 7581 states and 25854 transitions. [2021-07-13 20:31:41,468 INFO L78 Accepts]: Start accepts. Automaton has 7581 states and 25854 transitions. Word has length 30 [2021-07-13 20:31:41,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:41,468 INFO L482 AbstractCegarLoop]: Abstraction has 7581 states and 25854 transitions. [2021-07-13 20:31:41,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2021-07-13 20:31:41,468 INFO L276 IsEmpty]: Start isEmpty. Operand 7581 states and 25854 transitions. [2021-07-13 20:31:41,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:31:41,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:41,480 INFO L508 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] [2021-07-13 20:31:41,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable541,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:41,681 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:41,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:41,681 INFO L82 PathProgramCache]: Analyzing trace with hash -197397320, now seen corresponding path program 123 times [2021-07-13 20:31:41,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:41,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411119620] [2021-07-13 20:31:41,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:41,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:41,926 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:41,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:41,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411119620] [2021-07-13 20:31:41,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411119620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:41,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003060823] [2021-07-13 20:31:41,927 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:41,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:31:41,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:41,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:31:41,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:42,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:42,267 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-07-13 20:31:42,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 48 [2021-07-13 20:31:42,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:42,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:42,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:42,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:68, output treesize:3 [2021-07-13 20:31:42,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:42,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003060823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:42,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:42,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:31:42,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497198321] [2021-07-13 20:31:42,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:31:42,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:42,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:31:42,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:31:42,299 INFO L87 Difference]: Start difference. First operand 7581 states and 25854 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:46,482 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-07-13 20:31:46,683 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-07-13 20:31:48,722 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-07-13 20:31:48,877 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-07-13 20:31:49,070 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-07-13 20:31:49,883 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-07-13 20:31:50,194 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-07-13 20:31:50,786 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-07-13 20:31:51,086 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-07-13 20:31:55,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:55,377 INFO L93 Difference]: Finished difference Result 10935 states and 36351 transitions. [2021-07-13 20:31:55,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:31:55,377 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:31:55,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:55,400 INFO L225 Difference]: With dead ends: 10935 [2021-07-13 20:31:55,400 INFO L226 Difference]: Without dead ends: 10909 [2021-07-13 20:31:55,401 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 7947.3ms TimeCoverageRelationStatistics Valid=713, Invalid=3977, Unknown=2, NotChecked=0, Total=4692 [2021-07-13 20:31:55,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10909 states. [2021-07-13 20:31:55,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10909 to 7589. [2021-07-13 20:31:55,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7589 states, 7588 states have (on average 3.411834475487612) internal successors, (25889), 7588 states have internal predecessors, (25889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:55,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7589 states to 7589 states and 25889 transitions. [2021-07-13 20:31:55,582 INFO L78 Accepts]: Start accepts. Automaton has 7589 states and 25889 transitions. Word has length 30 [2021-07-13 20:31:55,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:55,583 INFO L482 AbstractCegarLoop]: Abstraction has 7589 states and 25889 transitions. [2021-07-13 20:31:55,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:55,583 INFO L276 IsEmpty]: Start isEmpty. Operand 7589 states and 25889 transitions. [2021-07-13 20:31:55,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:31:55,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:55,595 INFO L508 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] [2021-07-13 20:31:55,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-07-13 20:31:55,795 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:55,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:55,796 INFO L82 PathProgramCache]: Analyzing trace with hash 262838404, now seen corresponding path program 124 times [2021-07-13 20:31:55,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:55,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827853957] [2021-07-13 20:31:55,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:55,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:56,107 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-07-13 20:31:56,410 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-07-13 20:31:56,600 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-07-13 20:31:56,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:56,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:56,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827853957] [2021-07-13 20:31:56,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827853957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:56,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792588860] [2021-07-13 20:31:56,851 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:56,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:31:56,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:56,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:31:56,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:57,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:57,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:57,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:57,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-07-13 20:31:57,595 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:31:57,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:57,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:57,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-07-13 20:31:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:57,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792588860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:57,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:57,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:31:57,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613446014] [2021-07-13 20:31:57,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:31:57,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:57,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:31:57,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:31:57,884 INFO L87 Difference]: Start difference. First operand 7589 states and 25889 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:59,775 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-07-13 20:32:00,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:00,044 INFO L93 Difference]: Finished difference Result 9231 states and 31088 transitions. [2021-07-13 20:32:00,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:32:00,044 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:32:00,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:00,064 INFO L225 Difference]: With dead ends: 9231 [2021-07-13 20:32:00,064 INFO L226 Difference]: Without dead ends: 9196 [2021-07-13 20:32:00,065 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2530.1ms TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:32:00,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9196 states. [2021-07-13 20:32:00,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9196 to 7585. [2021-07-13 20:32:00,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7585 states, 7584 states have (on average 3.411260548523207) internal successors, (25871), 7584 states have internal predecessors, (25871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:00,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7585 states to 7585 states and 25871 transitions. [2021-07-13 20:32:00,209 INFO L78 Accepts]: Start accepts. Automaton has 7585 states and 25871 transitions. Word has length 30 [2021-07-13 20:32:00,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:00,209 INFO L482 AbstractCegarLoop]: Abstraction has 7585 states and 25871 transitions. [2021-07-13 20:32:00,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:00,209 INFO L276 IsEmpty]: Start isEmpty. Operand 7585 states and 25871 transitions. [2021-07-13 20:32:00,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:32:00,221 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:00,221 INFO L508 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] [2021-07-13 20:32:00,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:00,422 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:00,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:00,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1222250922, now seen corresponding path program 125 times [2021-07-13 20:32:00,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:00,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123504950] [2021-07-13 20:32:00,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:00,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:01,023 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-07-13 20:32:01,212 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-07-13 20:32:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:01,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:01,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123504950] [2021-07-13 20:32:01,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123504950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:01,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928962928] [2021-07-13 20:32:01,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:01,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:32:01,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:01,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:32:01,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:02,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:02,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:02,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:32:02,363 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:32:02,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:02,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:02,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-13 20:32:02,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:02,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928962928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:02,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:02,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:32:02,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632872498] [2021-07-13 20:32:02,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:32:02,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:02,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:32:02,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:32:02,566 INFO L87 Difference]: Start difference. First operand 7585 states and 25871 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:04,729 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-07-13 20:32:05,294 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-07-13 20:32:07,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:07,303 INFO L93 Difference]: Finished difference Result 9670 states and 32321 transitions. [2021-07-13 20:32:07,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:32:07,303 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:32:07,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:07,323 INFO L225 Difference]: With dead ends: 9670 [2021-07-13 20:32:07,323 INFO L226 Difference]: Without dead ends: 9635 [2021-07-13 20:32:07,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 3135.9ms TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:32:07,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9635 states. [2021-07-13 20:32:07,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9635 to 7577. [2021-07-13 20:32:07,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7577 states, 7576 states have (on average 3.4107708553326295) internal successors, (25840), 7576 states have internal predecessors, (25840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:07,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7577 states to 7577 states and 25840 transitions. [2021-07-13 20:32:07,461 INFO L78 Accepts]: Start accepts. Automaton has 7577 states and 25840 transitions. Word has length 30 [2021-07-13 20:32:07,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:07,462 INFO L482 AbstractCegarLoop]: Abstraction has 7577 states and 25840 transitions. [2021-07-13 20:32:07,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:07,462 INFO L276 IsEmpty]: Start isEmpty. Operand 7577 states and 25840 transitions. [2021-07-13 20:32:07,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:32:07,474 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:07,474 INFO L508 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] [2021-07-13 20:32:07,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable546 [2021-07-13 20:32:07,674 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:07,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:07,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1382773470, now seen corresponding path program 126 times [2021-07-13 20:32:07,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:07,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704612416] [2021-07-13 20:32:07,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:08,252 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-07-13 20:32:08,440 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-07-13 20:32:08,681 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:08,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:08,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704612416] [2021-07-13 20:32:08,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704612416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:08,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788895264] [2021-07-13 20:32:08,682 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:08,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:32:08,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:08,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:32:08,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:09,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:09,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:09,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:09,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-07-13 20:32:09,558 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:32:09,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:09,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:09,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-07-13 20:32:09,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:09,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788895264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:09,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:09,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:32:09,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864589400] [2021-07-13 20:32:09,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:32:09,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:09,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:32:09,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:32:09,910 INFO L87 Difference]: Start difference. First operand 7577 states and 25840 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:11,766 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-07-13 20:32:12,321 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-07-13 20:32:12,909 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-07-13 20:32:14,034 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-07-13 20:32:17,268 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-07-13 20:32:17,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:17,930 INFO L93 Difference]: Finished difference Result 9586 states and 32012 transitions. [2021-07-13 20:32:17,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:32:17,930 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:32:17,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:17,949 INFO L225 Difference]: With dead ends: 9586 [2021-07-13 20:32:17,949 INFO L226 Difference]: Without dead ends: 9518 [2021-07-13 20:32:17,949 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 5003.6ms TimeCoverageRelationStatistics Valid=235, Invalid=1745, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:32:17,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9518 states. [2021-07-13 20:32:18,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9518 to 7570. [2021-07-13 20:32:18,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7570 states, 7569 states have (on average 3.4089047430307833) internal successors, (25802), 7569 states have internal predecessors, (25802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:18,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7570 states to 7570 states and 25802 transitions. [2021-07-13 20:32:18,091 INFO L78 Accepts]: Start accepts. Automaton has 7570 states and 25802 transitions. Word has length 30 [2021-07-13 20:32:18,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:18,091 INFO L482 AbstractCegarLoop]: Abstraction has 7570 states and 25802 transitions. [2021-07-13 20:32:18,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:18,091 INFO L276 IsEmpty]: Start isEmpty. Operand 7570 states and 25802 transitions. [2021-07-13 20:32:18,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:32:18,103 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:18,103 INFO L508 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] [2021-07-13 20:32:18,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:18,304 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:18,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:18,304 INFO L82 PathProgramCache]: Analyzing trace with hash -692066666, now seen corresponding path program 127 times [2021-07-13 20:32:18,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:18,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138759634] [2021-07-13 20:32:18,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:18,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:18,834 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-07-13 20:32:19,005 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-07-13 20:32:19,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:19,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:19,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138759634] [2021-07-13 20:32:19,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138759634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:19,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768443405] [2021-07-13 20:32:19,318 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:19,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:19,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:32:19,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:20,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:20,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:20,296 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 19 treesize of output 11 [2021-07-13 20:32:20,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:20,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:20,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:20,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:32:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:20,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768443405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:20,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:20,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:32:20,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969558719] [2021-07-13 20:32:20,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:32:20,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:20,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:32:20,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:32:20,379 INFO L87 Difference]: Start difference. First operand 7570 states and 25802 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-07-13 20:32:20,759 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-07-13 20:32:21,044 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-07-13 20:32:21,385 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-07-13 20:32:21,773 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-07-13 20:32:21,996 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-07-13 20:32:22,827 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-07-13 20:32:23,579 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-07-13 20:32:23,763 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-07-13 20:32:23,996 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-07-13 20:32:24,264 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-07-13 20:32:24,749 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-07-13 20:32:25,048 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-07-13 20:32:25,326 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-07-13 20:32:25,836 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-07-13 20:32:26,360 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2021-07-13 20:32:26,512 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2021-07-13 20:32:26,961 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-07-13 20:32:27,182 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-07-13 20:32:27,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:27,963 INFO L93 Difference]: Finished difference Result 11143 states and 37083 transitions. [2021-07-13 20:32:27,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:32:27,963 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 30 [2021-07-13 20:32:27,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:27,985 INFO L225 Difference]: With dead ends: 11143 [2021-07-13 20:32:27,985 INFO L226 Difference]: Without dead ends: 11122 [2021-07-13 20:32:27,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 6536.8ms TimeCoverageRelationStatistics Valid=478, Invalid=2492, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:32:27,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11122 states. [2021-07-13 20:32:28,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11122 to 7564. [2021-07-13 20:32:28,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7564 states, 7563 states have (on average 3.4084358058971307) internal successors, (25778), 7563 states have internal predecessors, (25778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:28,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7564 states to 7564 states and 25778 transitions. [2021-07-13 20:32:28,156 INFO L78 Accepts]: Start accepts. Automaton has 7564 states and 25778 transitions. Word has length 30 [2021-07-13 20:32:28,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:28,156 INFO L482 AbstractCegarLoop]: Abstraction has 7564 states and 25778 transitions. [2021-07-13 20:32:28,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-07-13 20:32:28,156 INFO L276 IsEmpty]: Start isEmpty. Operand 7564 states and 25778 transitions. [2021-07-13 20:32:28,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:32:28,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:28,168 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:28,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:28,368 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:28,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:28,369 INFO L82 PathProgramCache]: Analyzing trace with hash -66350155, now seen corresponding path program 36 times [2021-07-13 20:32:28,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:28,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519576016] [2021-07-13 20:32:28,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:28,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:28,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519576016] [2021-07-13 20:32:28,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519576016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:28,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383076575] [2021-07-13 20:32:28,925 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:28,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:32:28,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:28,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:32:28,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:29,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 20:32:29,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:29,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:29,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:29,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-13 20:32:29,427 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:29,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383076575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:29,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:29,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:32:29,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115175567] [2021-07-13 20:32:29,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:32:29,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:29,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:32:29,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:32:29,428 INFO L87 Difference]: Start difference. First operand 7564 states and 25778 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:30,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:30,400 INFO L93 Difference]: Finished difference Result 7890 states and 26740 transitions. [2021-07-13 20:32:30,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:32:30,400 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:32:30,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:30,418 INFO L225 Difference]: With dead ends: 7890 [2021-07-13 20:32:30,418 INFO L226 Difference]: Without dead ends: 7861 [2021-07-13 20:32:30,418 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1052.7ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:32:30,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7861 states. [2021-07-13 20:32:30,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7861 to 7612. [2021-07-13 20:32:30,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7612 states, 7611 states have (on average 3.408487715149126) internal successors, (25942), 7611 states have internal predecessors, (25942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:30,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7612 states to 7612 states and 25942 transitions. [2021-07-13 20:32:30,553 INFO L78 Accepts]: Start accepts. Automaton has 7612 states and 25942 transitions. Word has length 30 [2021-07-13 20:32:30,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:30,554 INFO L482 AbstractCegarLoop]: Abstraction has 7612 states and 25942 transitions. [2021-07-13 20:32:30,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:30,554 INFO L276 IsEmpty]: Start isEmpty. Operand 7612 states and 25942 transitions. [2021-07-13 20:32:30,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:32:30,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:30,566 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:30,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-07-13 20:32:30,767 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:30,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:30,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1138574553, now seen corresponding path program 37 times [2021-07-13 20:32:30,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:30,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694480451] [2021-07-13 20:32:30,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:30,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:31,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:31,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:31,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694480451] [2021-07-13 20:32:31,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694480451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:31,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381423396] [2021-07-13 20:32:31,311 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:31,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:31,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:32:31,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:31,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 20:32:31,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:31,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:31,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:31,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-13 20:32:31,849 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:31,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381423396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:31,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:31,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:32:31,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885776451] [2021-07-13 20:32:31,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:32:31,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:31,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:32:31,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:32:31,850 INFO L87 Difference]: Start difference. First operand 7612 states and 25942 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:32,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:32,906 INFO L93 Difference]: Finished difference Result 7964 states and 26982 transitions. [2021-07-13 20:32:32,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:32:32,906 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:32:32,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:32,923 INFO L225 Difference]: With dead ends: 7964 [2021-07-13 20:32:32,923 INFO L226 Difference]: Without dead ends: 7927 [2021-07-13 20:32:32,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1075.2ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:32:32,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7927 states. [2021-07-13 20:32:33,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7927 to 7628. [2021-07-13 20:32:33,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7628 states, 7627 states have (on average 3.4081552379703686) internal successors, (25994), 7627 states have internal predecessors, (25994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:33,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7628 states to 7628 states and 25994 transitions. [2021-07-13 20:32:33,057 INFO L78 Accepts]: Start accepts. Automaton has 7628 states and 25994 transitions. Word has length 30 [2021-07-13 20:32:33,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:33,057 INFO L482 AbstractCegarLoop]: Abstraction has 7628 states and 25994 transitions. [2021-07-13 20:32:33,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:33,057 INFO L276 IsEmpty]: Start isEmpty. Operand 7628 states and 25994 transitions. [2021-07-13 20:32:33,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:32:33,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:33,070 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:33,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-07-13 20:32:33,271 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:33,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:33,271 INFO L82 PathProgramCache]: Analyzing trace with hash -427658407, now seen corresponding path program 38 times [2021-07-13 20:32:33,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:33,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150525894] [2021-07-13 20:32:33,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:33,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:33,762 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:33,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:33,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150525894] [2021-07-13 20:32:33,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150525894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:33,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075278384] [2021-07-13 20:32:33,762 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:33,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:32:33,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:33,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:32:33,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:34,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-13 20:32:34,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:34,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:34,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:34,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-13 20:32:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:34,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075278384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:34,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:34,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:32:34,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447035343] [2021-07-13 20:32:34,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:32:34,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:34,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:32:34,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:32:34,295 INFO L87 Difference]: Start difference. First operand 7628 states and 25994 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:35,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:35,532 INFO L93 Difference]: Finished difference Result 8177 states and 27650 transitions. [2021-07-13 20:32:35,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:32:35,532 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:32:35,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:35,549 INFO L225 Difference]: With dead ends: 8177 [2021-07-13 20:32:35,549 INFO L226 Difference]: Without dead ends: 8140 [2021-07-13 20:32:35,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1143.6ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:32:35,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8140 states. [2021-07-13 20:32:35,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8140 to 7656. [2021-07-13 20:32:35,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7656 states, 7655 states have (on average 3.4082299150881776) internal successors, (26090), 7655 states have internal predecessors, (26090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:35,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7656 states to 7656 states and 26090 transitions. [2021-07-13 20:32:35,686 INFO L78 Accepts]: Start accepts. Automaton has 7656 states and 26090 transitions. Word has length 30 [2021-07-13 20:32:35,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:35,686 INFO L482 AbstractCegarLoop]: Abstraction has 7656 states and 26090 transitions. [2021-07-13 20:32:35,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:35,686 INFO L276 IsEmpty]: Start isEmpty. Operand 7656 states and 26090 transitions. [2021-07-13 20:32:35,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:32:35,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:35,698 INFO L508 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] [2021-07-13 20:32:35,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-07-13 20:32:35,899 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:35,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:35,899 INFO L82 PathProgramCache]: Analyzing trace with hash 53555180, now seen corresponding path program 128 times [2021-07-13 20:32:35,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:35,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948265118] [2021-07-13 20:32:35,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:36,553 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-07-13 20:32:36,747 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-07-13 20:32:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:36,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:36,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948265118] [2021-07-13 20:32:36,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948265118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:36,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535638501] [2021-07-13 20:32:36,946 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:36,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:32:36,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:36,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:32:36,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:37,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:37,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:37,956 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 19 treesize of output 11 [2021-07-13 20:32:37,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:37,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:37,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:37,982 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:32:38,034 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:38,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535638501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:38,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:38,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:32:38,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330448380] [2021-07-13 20:32:38,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:32:38,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:38,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:32:38,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:32:38,035 INFO L87 Difference]: Start difference. First operand 7656 states and 26090 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:38,681 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-07-13 20:32:39,243 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 19 [2021-07-13 20:32:39,926 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-07-13 20:32:40,660 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-07-13 20:32:41,529 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-07-13 20:32:41,785 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-07-13 20:32:42,136 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-07-13 20:32:42,475 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-07-13 20:32:42,924 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-07-13 20:32:43,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:43,714 INFO L93 Difference]: Finished difference Result 9529 states and 31968 transitions. [2021-07-13 20:32:43,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:32:43,714 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:32:43,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:43,734 INFO L225 Difference]: With dead ends: 9529 [2021-07-13 20:32:43,734 INFO L226 Difference]: Without dead ends: 9497 [2021-07-13 20:32:43,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 4377.7ms TimeCoverageRelationStatistics Valid=239, Invalid=1321, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:32:43,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9497 states. [2021-07-13 20:32:43,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9497 to 7679. [2021-07-13 20:32:43,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7679 states, 7678 states have (on average 3.40739775983329) internal successors, (26162), 7678 states have internal predecessors, (26162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:43,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7679 states to 7679 states and 26162 transitions. [2021-07-13 20:32:43,867 INFO L78 Accepts]: Start accepts. Automaton has 7679 states and 26162 transitions. Word has length 30 [2021-07-13 20:32:43,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:43,867 INFO L482 AbstractCegarLoop]: Abstraction has 7679 states and 26162 transitions. [2021-07-13 20:32:43,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:43,867 INFO L276 IsEmpty]: Start isEmpty. Operand 7679 states and 26162 transitions. [2021-07-13 20:32:43,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:32:43,879 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:43,879 INFO L508 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] [2021-07-13 20:32:44,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-07-13 20:32:44,080 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:44,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:44,080 INFO L82 PathProgramCache]: Analyzing trace with hash -920787924, now seen corresponding path program 129 times [2021-07-13 20:32:44,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:44,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476335679] [2021-07-13 20:32:44,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:44,803 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-07-13 20:32:44,981 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-07-13 20:32:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:45,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:45,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476335679] [2021-07-13 20:32:45,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476335679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:45,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146493954] [2021-07-13 20:32:45,237 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:45,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:32:45,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:45,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:32:45,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:46,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:46,025 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 19 treesize of output 35 [2021-07-13 20:32:46,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:32:46,153 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-07-13 20:32:46,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:46,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:46,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:156 [2021-07-13 20:32:46,897 WARN L205 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-07-13 20:32:48,002 WARN L205 SmtUtils]: Spent 974.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-07-13 20:32:48,566 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-07-13 20:32:48,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:48,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146493954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:48,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:48,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-07-13 20:32:48,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370662645] [2021-07-13 20:32:48,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:32:48,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:48,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:32:48,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:32:48,634 INFO L87 Difference]: Start difference. First operand 7679 states and 26162 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2021-07-13 20:32:49,443 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 17 [2021-07-13 20:32:50,077 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 19 [2021-07-13 20:32:50,363 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 18 [2021-07-13 20:32:50,631 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 19 [2021-07-13 20:32:51,876 WARN L205 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-07-13 20:32:52,323 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 33 [2021-07-13 20:32:52,898 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 25 [2021-07-13 20:32:53,508 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 22 [2021-07-13 20:32:54,978 WARN L205 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 38 [2021-07-13 20:32:55,468 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 34 [2021-07-13 20:32:56,523 WARN L205 SmtUtils]: Spent 831.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2021-07-13 20:32:57,320 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 29 [2021-07-13 20:32:57,707 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 23 [2021-07-13 20:32:58,168 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 32 [2021-07-13 20:32:58,441 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-07-13 20:32:58,782 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-07-13 20:32:59,095 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 35 [2021-07-13 20:33:00,211 WARN L205 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2021-07-13 20:33:01,263 WARN L205 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-07-13 20:33:01,909 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-07-13 20:33:03,036 WARN L205 SmtUtils]: Spent 980.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-07-13 20:33:04,054 WARN L205 SmtUtils]: Spent 838.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 35 [2021-07-13 20:33:04,594 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 22 [2021-07-13 20:33:04,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:04,911 INFO L93 Difference]: Finished difference Result 10868 states and 36318 transitions. [2021-07-13 20:33:04,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:33:04,911 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 30 [2021-07-13 20:33:04,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:04,939 INFO L225 Difference]: With dead ends: 10868 [2021-07-13 20:33:04,939 INFO L226 Difference]: Without dead ends: 10793 [2021-07-13 20:33:04,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 16092.1ms TimeCoverageRelationStatistics Valid=514, Invalid=3146, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:33:04,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10793 states. [2021-07-13 20:33:05,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10793 to 7682. [2021-07-13 20:33:05,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7682 states, 7681 states have (on average 3.406587683895326) internal successors, (26166), 7681 states have internal predecessors, (26166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:05,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7682 states to 7682 states and 26166 transitions. [2021-07-13 20:33:05,113 INFO L78 Accepts]: Start accepts. Automaton has 7682 states and 26166 transitions. Word has length 30 [2021-07-13 20:33:05,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:05,113 INFO L482 AbstractCegarLoop]: Abstraction has 7682 states and 26166 transitions. [2021-07-13 20:33:05,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2021-07-13 20:33:05,113 INFO L276 IsEmpty]: Start isEmpty. Operand 7682 states and 26166 transitions. [2021-07-13 20:33:05,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:33:05,126 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:05,126 INFO L508 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] [2021-07-13 20:33:05,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable555,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:05,326 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:05,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:05,327 INFO L82 PathProgramCache]: Analyzing trace with hash 306904492, now seen corresponding path program 130 times [2021-07-13 20:33:05,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:05,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846832368] [2021-07-13 20:33:05,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:05,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:06,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:06,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846832368] [2021-07-13 20:33:06,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846832368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:06,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704932054] [2021-07-13 20:33:06,264 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:06,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:33:06,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:06,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:33:06,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:07,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:07,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:07,246 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 19 treesize of output 11 [2021-07-13 20:33:07,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:07,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:07,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:07,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:33:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:07,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704932054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:07,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:07,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-07-13 20:33:07,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215901757] [2021-07-13 20:33:07,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:33:07,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:07,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:33:07,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:33:07,331 INFO L87 Difference]: Start difference. First operand 7682 states and 26166 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:09,038 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-07-13 20:33:10,481 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-07-13 20:33:11,034 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-07-13 20:33:11,361 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-07-13 20:33:12,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:12,304 INFO L93 Difference]: Finished difference Result 10040 states and 33750 transitions. [2021-07-13 20:33:12,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:33:12,304 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:33:12,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:12,327 INFO L225 Difference]: With dead ends: 10040 [2021-07-13 20:33:12,327 INFO L226 Difference]: Without dead ends: 9989 [2021-07-13 20:33:12,328 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 3770.7ms TimeCoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:33:12,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9989 states. [2021-07-13 20:33:12,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9989 to 7724. [2021-07-13 20:33:12,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7724 states, 7723 states have (on average 3.4080020717337822) internal successors, (26320), 7723 states have internal predecessors, (26320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:12,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7724 states to 7724 states and 26320 transitions. [2021-07-13 20:33:12,487 INFO L78 Accepts]: Start accepts. Automaton has 7724 states and 26320 transitions. Word has length 30 [2021-07-13 20:33:12,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:12,488 INFO L482 AbstractCegarLoop]: Abstraction has 7724 states and 26320 transitions. [2021-07-13 20:33:12,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:12,488 INFO L276 IsEmpty]: Start isEmpty. Operand 7724 states and 26320 transitions. [2021-07-13 20:33:12,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:33:12,501 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:12,501 INFO L508 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] [2021-07-13 20:33:12,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2021-07-13 20:33:12,701 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:12,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:12,702 INFO L82 PathProgramCache]: Analyzing trace with hash 861731688, now seen corresponding path program 131 times [2021-07-13 20:33:12,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:12,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541018633] [2021-07-13 20:33:12,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:13,405 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-07-13 20:33:13,600 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-07-13 20:33:13,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:13,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:13,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541018633] [2021-07-13 20:33:13,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541018633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:13,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29445684] [2021-07-13 20:33:13,809 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:13,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:33:13,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:13,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:33:13,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:14,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:14,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:14,915 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 19 treesize of output 11 [2021-07-13 20:33:14,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:14,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:14,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:14,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:33:15,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:15,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29445684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:15,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:15,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:33:15,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153897141] [2021-07-13 20:33:15,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:33:15,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:15,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:33:15,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:33:15,005 INFO L87 Difference]: Start difference. First operand 7724 states and 26320 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:15,650 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-07-13 20:33:16,896 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-07-13 20:33:17,597 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-07-13 20:33:18,183 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-07-13 20:33:18,460 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-07-13 20:33:18,797 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-07-13 20:33:19,347 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-07-13 20:33:19,660 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-07-13 20:33:20,110 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-07-13 20:33:20,486 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-07-13 20:33:20,845 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-07-13 20:33:21,351 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 26 [2021-07-13 20:33:21,648 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-07-13 20:33:22,739 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 30 [2021-07-13 20:33:23,151 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-07-13 20:33:23,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:23,763 INFO L93 Difference]: Finished difference Result 10471 states and 35019 transitions. [2021-07-13 20:33:23,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:33:23,763 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:33:23,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:23,787 INFO L225 Difference]: With dead ends: 10471 [2021-07-13 20:33:23,787 INFO L226 Difference]: Without dead ends: 10435 [2021-07-13 20:33:23,788 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 6887.3ms TimeCoverageRelationStatistics Valid=405, Invalid=2351, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:33:23,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10435 states. [2021-07-13 20:33:23,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10435 to 7741. [2021-07-13 20:33:23,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7741 states, 7740 states have (on average 3.4059431524547805) internal successors, (26362), 7740 states have internal predecessors, (26362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:23,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7741 states to 7741 states and 26362 transitions. [2021-07-13 20:33:23,952 INFO L78 Accepts]: Start accepts. Automaton has 7741 states and 26362 transitions. Word has length 30 [2021-07-13 20:33:23,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:23,952 INFO L482 AbstractCegarLoop]: Abstraction has 7741 states and 26362 transitions. [2021-07-13 20:33:23,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:23,952 INFO L276 IsEmpty]: Start isEmpty. Operand 7741 states and 26362 transitions. [2021-07-13 20:33:23,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:33:23,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:23,964 INFO L508 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] [2021-07-13 20:33:24,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable574,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:24,165 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:24,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:24,165 INFO L82 PathProgramCache]: Analyzing trace with hash -806581072, now seen corresponding path program 132 times [2021-07-13 20:33:24,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:24,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801330010] [2021-07-13 20:33:24,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:24,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:24,837 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-07-13 20:33:25,026 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-07-13 20:33:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:25,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:25,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801330010] [2021-07-13 20:33:25,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801330010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:25,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997587191] [2021-07-13 20:33:25,362 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:25,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:33:25,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:25,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:33:25,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:26,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:26,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:26,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:33:26,241 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:33:26,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:26,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:26,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-13 20:33:26,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:26,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997587191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:26,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:26,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-07-13 20:33:26,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572153750] [2021-07-13 20:33:26,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:33:26,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:26,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:33:26,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:33:26,457 INFO L87 Difference]: Start difference. First operand 7741 states and 26362 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-07-13 20:33:27,389 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 19 [2021-07-13 20:33:28,168 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-07-13 20:33:28,948 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-07-13 20:33:29,440 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-07-13 20:33:29,927 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-07-13 20:33:30,972 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-07-13 20:33:33,273 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-07-13 20:33:33,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:33,614 INFO L93 Difference]: Finished difference Result 10347 states and 34526 transitions. [2021-07-13 20:33:33,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:33:33,615 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 30 [2021-07-13 20:33:33,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:33,637 INFO L225 Difference]: With dead ends: 10347 [2021-07-13 20:33:33,638 INFO L226 Difference]: Without dead ends: 10275 [2021-07-13 20:33:33,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 4334.8ms TimeCoverageRelationStatistics Valid=317, Invalid=1243, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:33:33,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10275 states. [2021-07-13 20:33:33,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10275 to 7692. [2021-07-13 20:33:33,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7692 states, 7691 states have (on average 3.4054089195163177) internal successors, (26191), 7691 states have internal predecessors, (26191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:33,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7692 states to 7692 states and 26191 transitions. [2021-07-13 20:33:33,821 INFO L78 Accepts]: Start accepts. Automaton has 7692 states and 26191 transitions. Word has length 30 [2021-07-13 20:33:33,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:33,821 INFO L482 AbstractCegarLoop]: Abstraction has 7692 states and 26191 transitions. [2021-07-13 20:33:33,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-07-13 20:33:33,821 INFO L276 IsEmpty]: Start isEmpty. Operand 7692 states and 26191 transitions. [2021-07-13 20:33:33,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:33:33,833 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:33,833 INFO L508 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] [2021-07-13 20:33:34,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-07-13 20:33:34,034 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:34,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:34,034 INFO L82 PathProgramCache]: Analyzing trace with hash -697524088, now seen corresponding path program 133 times [2021-07-13 20:33:34,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:34,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094903613] [2021-07-13 20:33:34,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:34,630 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-07-13 20:33:34,825 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-07-13 20:33:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:35,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:35,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094903613] [2021-07-13 20:33:35,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094903613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:35,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730692908] [2021-07-13 20:33:35,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:35,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:35,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:33:35,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:36,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:36,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:36,128 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 19 treesize of output 11 [2021-07-13 20:33:36,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:36,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:36,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:36,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:33:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:36,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730692908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:36,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:36,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:33:36,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426837637] [2021-07-13 20:33:36,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:33:36,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:36,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:33:36,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:33:36,207 INFO L87 Difference]: Start difference. First operand 7692 states and 26191 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:36,576 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-07-13 20:33:36,851 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-07-13 20:33:37,449 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-07-13 20:33:40,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:40,648 INFO L93 Difference]: Finished difference Result 9596 states and 32348 transitions. [2021-07-13 20:33:40,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:33:40,648 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:33:40,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:40,670 INFO L225 Difference]: With dead ends: 9596 [2021-07-13 20:33:40,670 INFO L226 Difference]: Without dead ends: 9581 [2021-07-13 20:33:40,671 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 3431.1ms TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:33:40,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9581 states. [2021-07-13 20:33:40,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9581 to 7697. [2021-07-13 20:33:40,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7697 states, 7696 states have (on average 3.4056652806652807) internal successors, (26210), 7696 states have internal predecessors, (26210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:40,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7697 states to 7697 states and 26210 transitions. [2021-07-13 20:33:40,813 INFO L78 Accepts]: Start accepts. Automaton has 7697 states and 26210 transitions. Word has length 30 [2021-07-13 20:33:40,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:40,813 INFO L482 AbstractCegarLoop]: Abstraction has 7697 states and 26210 transitions. [2021-07-13 20:33:40,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:40,813 INFO L276 IsEmpty]: Start isEmpty. Operand 7697 states and 26210 transitions. [2021-07-13 20:33:40,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:33:40,824 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:40,824 INFO L508 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] [2021-07-13 20:33:41,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:41,024 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:41,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:41,025 INFO L82 PathProgramCache]: Analyzing trace with hash -951187922, now seen corresponding path program 134 times [2021-07-13 20:33:41,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:41,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24600690] [2021-07-13 20:33:41,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:41,590 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-07-13 20:33:41,783 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-07-13 20:33:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:42,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:42,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24600690] [2021-07-13 20:33:42,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24600690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:42,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212955112] [2021-07-13 20:33:42,055 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:42,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:33:42,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:42,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:33:42,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:42,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:42,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:42,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:33:42,949 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:33:43,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:43,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:43,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-13 20:33:43,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:43,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212955112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:43,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:43,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:33:43,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271460218] [2021-07-13 20:33:43,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:33:43,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:43,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:33:43,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:33:43,209 INFO L87 Difference]: Start difference. First operand 7697 states and 26210 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:43,536 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-07-13 20:33:43,804 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-07-13 20:33:44,280 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-07-13 20:33:44,581 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-07-13 20:33:46,292 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-07-13 20:33:46,625 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-07-13 20:33:46,812 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-07-13 20:33:47,138 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-07-13 20:33:48,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:48,216 INFO L93 Difference]: Finished difference Result 9964 states and 33540 transitions. [2021-07-13 20:33:48,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:33:48,217 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:33:48,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:48,241 INFO L225 Difference]: With dead ends: 9964 [2021-07-13 20:33:48,241 INFO L226 Difference]: Without dead ends: 9949 [2021-07-13 20:33:48,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 4092.7ms TimeCoverageRelationStatistics Valid=218, Invalid=1114, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:33:48,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9949 states. [2021-07-13 20:33:48,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9949 to 7694. [2021-07-13 20:33:48,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7694 states, 7693 states have (on average 3.4053035226829587) internal successors, (26197), 7693 states have internal predecessors, (26197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:48,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7694 states to 7694 states and 26197 transitions. [2021-07-13 20:33:48,416 INFO L78 Accepts]: Start accepts. Automaton has 7694 states and 26197 transitions. Word has length 30 [2021-07-13 20:33:48,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:48,417 INFO L482 AbstractCegarLoop]: Abstraction has 7694 states and 26197 transitions. [2021-07-13 20:33:48,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:48,417 INFO L276 IsEmpty]: Start isEmpty. Operand 7694 states and 26197 transitions. [2021-07-13 20:33:48,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:33:48,430 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:48,430 INFO L508 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] [2021-07-13 20:33:48,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-07-13 20:33:48,631 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:48,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:48,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1739005664, now seen corresponding path program 135 times [2021-07-13 20:33:48,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:48,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34876572] [2021-07-13 20:33:48,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:48,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:49,211 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-07-13 20:33:49,392 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-07-13 20:33:49,569 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-07-13 20:33:49,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:49,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:49,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34876572] [2021-07-13 20:33:49,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34876572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:49,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005436376] [2021-07-13 20:33:49,753 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:49,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:33:49,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:49,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:33:49,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:50,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:50,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:50,748 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 19 treesize of output 11 [2021-07-13 20:33:50,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:50,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:50,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:50,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-07-13 20:33:50,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:50,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005436376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:50,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:50,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:33:50,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902195155] [2021-07-13 20:33:50,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:33:50,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:50,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:33:50,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:33:50,829 INFO L87 Difference]: Start difference. First operand 7694 states and 26197 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:53,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:53,380 INFO L93 Difference]: Finished difference Result 9270 states and 31237 transitions. [2021-07-13 20:33:53,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:33:53,381 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:33:53,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:53,400 INFO L225 Difference]: With dead ends: 9270 [2021-07-13 20:33:53,400 INFO L226 Difference]: Without dead ends: 9255 [2021-07-13 20:33:53,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 2424.3ms TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:33:53,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9255 states. [2021-07-13 20:33:53,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9255 to 7697. [2021-07-13 20:33:53,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7697 states, 7696 states have (on average 3.405535343035343) internal successors, (26209), 7696 states have internal predecessors, (26209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:53,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7697 states to 7697 states and 26209 transitions. [2021-07-13 20:33:53,557 INFO L78 Accepts]: Start accepts. Automaton has 7697 states and 26209 transitions. Word has length 30 [2021-07-13 20:33:53,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:53,558 INFO L482 AbstractCegarLoop]: Abstraction has 7697 states and 26209 transitions. [2021-07-13 20:33:53,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:53,558 INFO L276 IsEmpty]: Start isEmpty. Operand 7697 states and 26209 transitions. [2021-07-13 20:33:53,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:33:53,569 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:53,569 INFO L508 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] [2021-07-13 20:33:53,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:53,770 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:53,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:53,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1234861006, now seen corresponding path program 136 times [2021-07-13 20:33:53,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:53,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899224417] [2021-07-13 20:33:53,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:54,334 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-07-13 20:33:54,520 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-07-13 20:33:54,696 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-07-13 20:33:54,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:54,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:54,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899224417] [2021-07-13 20:33:54,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899224417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:54,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22622712] [2021-07-13 20:33:54,897 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:54,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:33:54,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:54,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:33:54,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:55,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:55,801 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:55,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:33:55,803 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:33:55,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:55,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:55,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-13 20:33:55,998 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:55,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22622712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:55,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:55,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:33:55,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911891182] [2021-07-13 20:33:55,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:33:55,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:55,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:33:55,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:33:55,999 INFO L87 Difference]: Start difference. First operand 7697 states and 26209 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:57,580 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-07-13 20:33:59,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:59,256 INFO L93 Difference]: Finished difference Result 9829 states and 33022 transitions. [2021-07-13 20:33:59,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:33:59,256 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:33:59,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:59,277 INFO L225 Difference]: With dead ends: 9829 [2021-07-13 20:33:59,277 INFO L226 Difference]: Without dead ends: 9810 [2021-07-13 20:33:59,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 2933.2ms TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:33:59,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9810 states. [2021-07-13 20:33:59,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9810 to 7693. [2021-07-13 20:33:59,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7693 states, 7692 states have (on average 3.40535621424857) internal successors, (26194), 7692 states have internal predecessors, (26194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:59,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7693 states to 7693 states and 26194 transitions. [2021-07-13 20:33:59,434 INFO L78 Accepts]: Start accepts. Automaton has 7693 states and 26194 transitions. Word has length 30 [2021-07-13 20:33:59,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:59,434 INFO L482 AbstractCegarLoop]: Abstraction has 7693 states and 26194 transitions. [2021-07-13 20:33:59,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:59,434 INFO L276 IsEmpty]: Start isEmpty. Operand 7693 states and 26194 transitions. [2021-07-13 20:33:59,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:33:59,446 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:59,446 INFO L508 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] [2021-07-13 20:33:59,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:59,646 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:59,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:59,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1901077732, now seen corresponding path program 137 times [2021-07-13 20:33:59,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:59,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715729195] [2021-07-13 20:33:59,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:00,214 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-07-13 20:34:00,392 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-07-13 20:34:00,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:00,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:00,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715729195] [2021-07-13 20:34:00,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715729195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:00,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356919919] [2021-07-13 20:34:00,724 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:00,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:34:00,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:00,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:34:00,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:01,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:01,505 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:01,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:34:01,507 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:34:01,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:01,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:01,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-07-13 20:34:01,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:01,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356919919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:01,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:01,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:34:01,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980434933] [2021-07-13 20:34:01,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:34:01,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:01,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:34:01,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:34:01,868 INFO L87 Difference]: Start difference. First operand 7693 states and 26194 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:03,682 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-07-13 20:34:03,888 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-07-13 20:34:04,524 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-07-13 20:34:06,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:06,237 INFO L93 Difference]: Finished difference Result 9812 states and 32964 transitions. [2021-07-13 20:34:06,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:34:06,237 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:34:06,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:06,258 INFO L225 Difference]: With dead ends: 9812 [2021-07-13 20:34:06,258 INFO L226 Difference]: Without dead ends: 9774 [2021-07-13 20:34:06,259 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 3559.4ms TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:34:06,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9774 states. [2021-07-13 20:34:06,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9774 to 7691. [2021-07-13 20:34:06,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7691 states, 7690 states have (on average 3.4054616384915475) internal successors, (26188), 7690 states have internal predecessors, (26188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:06,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7691 states to 7691 states and 26188 transitions. [2021-07-13 20:34:06,410 INFO L78 Accepts]: Start accepts. Automaton has 7691 states and 26188 transitions. Word has length 30 [2021-07-13 20:34:06,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:06,410 INFO L482 AbstractCegarLoop]: Abstraction has 7691 states and 26188 transitions. [2021-07-13 20:34:06,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:06,410 INFO L276 IsEmpty]: Start isEmpty. Operand 7691 states and 26188 transitions. [2021-07-13 20:34:06,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:34:06,423 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:06,423 INFO L508 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] [2021-07-13 20:34:06,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable584 [2021-07-13 20:34:06,624 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:06,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:06,624 INFO L82 PathProgramCache]: Analyzing trace with hash 78542928, now seen corresponding path program 138 times [2021-07-13 20:34:06,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:06,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899792315] [2021-07-13 20:34:06,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:06,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:07,297 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-07-13 20:34:07,476 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-07-13 20:34:07,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:07,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:07,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899792315] [2021-07-13 20:34:07,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899792315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:07,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603483519] [2021-07-13 20:34:07,662 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:07,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:34:07,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:07,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:34:07,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:08,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:08,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:08,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:08,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-07-13 20:34:08,414 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:34:08,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:08,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:08,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-07-13 20:34:08,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:08,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603483519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:08,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:08,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:34:08,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31064569] [2021-07-13 20:34:08,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:34:08,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:08,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:34:08,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:34:08,710 INFO L87 Difference]: Start difference. First operand 7691 states and 26188 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:09,344 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-07-13 20:34:10,506 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-07-13 20:34:11,774 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-07-13 20:34:12,150 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-07-13 20:34:12,451 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-07-13 20:34:14,707 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-07-13 20:34:15,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:15,250 INFO L93 Difference]: Finished difference Result 9869 states and 33063 transitions. [2021-07-13 20:34:15,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:34:15,251 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:34:15,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:15,271 INFO L225 Difference]: With dead ends: 9869 [2021-07-13 20:34:15,271 INFO L226 Difference]: Without dead ends: 9833 [2021-07-13 20:34:15,271 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 4674.1ms TimeCoverageRelationStatistics Valid=228, Invalid=1578, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:34:15,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9833 states. [2021-07-13 20:34:15,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9833 to 7688. [2021-07-13 20:34:15,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7688 states, 7687 states have (on average 3.4041888903343307) internal successors, (26168), 7687 states have internal predecessors, (26168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:15,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7688 states to 7688 states and 26168 transitions. [2021-07-13 20:34:15,418 INFO L78 Accepts]: Start accepts. Automaton has 7688 states and 26168 transitions. Word has length 30 [2021-07-13 20:34:15,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:15,418 INFO L482 AbstractCegarLoop]: Abstraction has 7688 states and 26168 transitions. [2021-07-13 20:34:15,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:15,418 INFO L276 IsEmpty]: Start isEmpty. Operand 7688 states and 26168 transitions. [2021-07-13 20:34:15,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:34:15,430 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:15,430 INFO L508 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] [2021-07-13 20:34:15,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-07-13 20:34:15,633 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:15,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:15,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1358479268, now seen corresponding path program 139 times [2021-07-13 20:34:15,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:15,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217537244] [2021-07-13 20:34:15,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:16,313 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-07-13 20:34:16,491 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-07-13 20:34:16,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:16,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:16,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217537244] [2021-07-13 20:34:16,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217537244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:16,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522381418] [2021-07-13 20:34:16,679 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:16,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:16,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:34:16,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:17,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:17,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:17,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:34:17,532 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:34:17,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:17,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:17,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-13 20:34:17,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:17,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522381418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:17,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:17,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:34:17,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024935116] [2021-07-13 20:34:17,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:34:17,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:17,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:34:17,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:34:17,733 INFO L87 Difference]: Start difference. First operand 7688 states and 26168 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:20,750 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-07-13 20:34:21,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:21,851 INFO L93 Difference]: Finished difference Result 10287 states and 34404 transitions. [2021-07-13 20:34:21,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:34:21,851 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:34:21,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:21,873 INFO L225 Difference]: With dead ends: 10287 [2021-07-13 20:34:21,873 INFO L226 Difference]: Without dead ends: 10237 [2021-07-13 20:34:21,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 3013.4ms TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:34:21,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10237 states. [2021-07-13 20:34:22,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10237 to 7690. [2021-07-13 20:34:22,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7690 states, 7689 states have (on average 3.404343867863181) internal successors, (26176), 7689 states have internal predecessors, (26176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:22,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7690 states to 7690 states and 26176 transitions. [2021-07-13 20:34:22,033 INFO L78 Accepts]: Start accepts. Automaton has 7690 states and 26176 transitions. Word has length 30 [2021-07-13 20:34:22,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:22,033 INFO L482 AbstractCegarLoop]: Abstraction has 7690 states and 26176 transitions. [2021-07-13 20:34:22,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:22,033 INFO L276 IsEmpty]: Start isEmpty. Operand 7690 states and 26176 transitions. [2021-07-13 20:34:22,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:34:22,044 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:22,044 INFO L508 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] [2021-07-13 20:34:22,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-07-13 20:34:22,245 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:22,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:22,245 INFO L82 PathProgramCache]: Analyzing trace with hash -268655640, now seen corresponding path program 140 times [2021-07-13 20:34:22,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:22,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088509685] [2021-07-13 20:34:22,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:22,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:22,913 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-07-13 20:34:23,083 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-07-13 20:34:23,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:23,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:23,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088509685] [2021-07-13 20:34:23,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088509685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:23,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878099519] [2021-07-13 20:34:23,396 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:23,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:34:23,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:23,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:34:23,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:24,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:24,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-07-13 20:34:24,226 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:34:24,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:24,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:24,266 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-07-13 20:34:24,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:24,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878099519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:24,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:24,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:34:24,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391371823] [2021-07-13 20:34:24,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:34:24,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:24,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:34:24,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:34:24,531 INFO L87 Difference]: Start difference. First operand 7690 states and 26176 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:26,401 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-07-13 20:34:27,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:27,229 INFO L93 Difference]: Finished difference Result 9773 states and 32852 transitions. [2021-07-13 20:34:27,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:34:27,230 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:34:27,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:27,251 INFO L225 Difference]: With dead ends: 9773 [2021-07-13 20:34:27,251 INFO L226 Difference]: Without dead ends: 9749 [2021-07-13 20:34:27,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 2580.7ms TimeCoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:34:27,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9749 states. [2021-07-13 20:34:27,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9749 to 7684. [2021-07-13 20:34:27,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7684 states, 7683 states have (on average 3.404139008199922) internal successors, (26154), 7683 states have internal predecessors, (26154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:27,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7684 states to 7684 states and 26154 transitions. [2021-07-13 20:34:27,380 INFO L78 Accepts]: Start accepts. Automaton has 7684 states and 26154 transitions. Word has length 30 [2021-07-13 20:34:27,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:27,380 INFO L482 AbstractCegarLoop]: Abstraction has 7684 states and 26154 transitions. [2021-07-13 20:34:27,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:27,380 INFO L276 IsEmpty]: Start isEmpty. Operand 7684 states and 26154 transitions. [2021-07-13 20:34:27,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:34:27,391 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:27,391 INFO L508 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] [2021-07-13 20:34:27,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:27,592 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:27,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:27,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1727704690, now seen corresponding path program 141 times [2021-07-13 20:34:27,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:27,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620017386] [2021-07-13 20:34:27,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:28,352 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-07-13 20:34:28,542 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-07-13 20:34:28,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:28,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:28,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620017386] [2021-07-13 20:34:28,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620017386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:28,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735732090] [2021-07-13 20:34:28,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:28,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:34:28,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:28,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:34:28,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:29,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:29,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:29,739 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 19 treesize of output 11 [2021-07-13 20:34:29,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:29,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:29,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:29,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-07-13 20:34:29,819 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:29,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735732090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:29,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:29,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:34:29,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437490509] [2021-07-13 20:34:29,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:34:29,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:29,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:34:29,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:34:29,820 INFO L87 Difference]: Start difference. First operand 7684 states and 26154 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:32,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:32,649 INFO L93 Difference]: Finished difference Result 9322 states and 31376 transitions. [2021-07-13 20:34:32,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:34:32,650 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:34:32,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:32,669 INFO L225 Difference]: With dead ends: 9322 [2021-07-13 20:34:32,669 INFO L226 Difference]: Without dead ends: 9307 [2021-07-13 20:34:32,670 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 2691.4ms TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:34:32,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9307 states. [2021-07-13 20:34:32,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9307 to 7687. [2021-07-13 20:34:32,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7687 states, 7686 states have (on average 3.4043715846994536) internal successors, (26166), 7686 states have internal predecessors, (26166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:32,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7687 states to 7687 states and 26166 transitions. [2021-07-13 20:34:32,846 INFO L78 Accepts]: Start accepts. Automaton has 7687 states and 26166 transitions. Word has length 30 [2021-07-13 20:34:32,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:32,846 INFO L482 AbstractCegarLoop]: Abstraction has 7687 states and 26166 transitions. [2021-07-13 20:34:32,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:32,846 INFO L276 IsEmpty]: Start isEmpty. Operand 7687 states and 26166 transitions. [2021-07-13 20:34:32,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:34:32,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:32,859 INFO L508 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] [2021-07-13 20:34:33,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:33,059 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:33,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:33,060 INFO L82 PathProgramCache]: Analyzing trace with hash -491829020, now seen corresponding path program 142 times [2021-07-13 20:34:33,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:33,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380262483] [2021-07-13 20:34:33,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:33,885 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-07-13 20:34:34,140 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-07-13 20:34:34,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:34,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:34,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380262483] [2021-07-13 20:34:34,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380262483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:34,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86142988] [2021-07-13 20:34:34,418 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:34,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:34:34,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:34,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:34:34,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:35,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:35,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:35,337 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 19 treesize of output 11 [2021-07-13 20:34:35,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:35,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:35,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:35,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:34:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:35,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86142988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:35,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:35,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-07-13 20:34:35,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900259167] [2021-07-13 20:34:35,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:34:35,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:35,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:34:35,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:34:35,419 INFO L87 Difference]: Start difference. First operand 7687 states and 26166 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:37,595 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-07-13 20:34:39,724 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-07-13 20:34:40,009 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-07-13 20:34:40,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:40,601 INFO L93 Difference]: Finished difference Result 10068 states and 33705 transitions. [2021-07-13 20:34:40,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:34:40,601 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:34:40,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:40,623 INFO L225 Difference]: With dead ends: 10068 [2021-07-13 20:34:40,623 INFO L226 Difference]: Without dead ends: 10022 [2021-07-13 20:34:40,623 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 4031.4ms TimeCoverageRelationStatistics Valid=232, Invalid=1174, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:34:40,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10022 states. [2021-07-13 20:34:40,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10022 to 7692. [2021-07-13 20:34:40,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7692 states, 7691 states have (on average 3.4039786763749835) internal successors, (26180), 7691 states have internal predecessors, (26180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:40,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7692 states to 7692 states and 26180 transitions. [2021-07-13 20:34:40,768 INFO L78 Accepts]: Start accepts. Automaton has 7692 states and 26180 transitions. Word has length 30 [2021-07-13 20:34:40,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:40,768 INFO L482 AbstractCegarLoop]: Abstraction has 7692 states and 26180 transitions. [2021-07-13 20:34:40,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:40,768 INFO L276 IsEmpty]: Start isEmpty. Operand 7692 states and 26180 transitions. [2021-07-13 20:34:40,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:34:40,780 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:40,780 INFO L508 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] [2021-07-13 20:34:40,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable595 [2021-07-13 20:34:40,981 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:40,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:40,981 INFO L82 PathProgramCache]: Analyzing trace with hash -245264536, now seen corresponding path program 143 times [2021-07-13 20:34:40,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:40,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493925703] [2021-07-13 20:34:40,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:41,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:41,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:41,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493925703] [2021-07-13 20:34:41,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493925703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:41,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730979398] [2021-07-13 20:34:41,924 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:41,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:34:41,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:41,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:34:41,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:42,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:42,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:42,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:42,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-07-13 20:34:42,838 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:34:42,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:42,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:42,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-07-13 20:34:43,227 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:43,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730979398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:43,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:43,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-07-13 20:34:43,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9881012] [2021-07-13 20:34:43,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:34:43,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:43,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:34:43,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:34:43,228 INFO L87 Difference]: Start difference. First operand 7692 states and 26180 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:46,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:46,319 INFO L93 Difference]: Finished difference Result 10182 states and 34192 transitions. [2021-07-13 20:34:46,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:34:46,319 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:34:46,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:46,341 INFO L225 Difference]: With dead ends: 10182 [2021-07-13 20:34:46,341 INFO L226 Difference]: Without dead ends: 10135 [2021-07-13 20:34:46,341 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 2741.1ms TimeCoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:34:46,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10135 states. [2021-07-13 20:34:46,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10135 to 7690. [2021-07-13 20:34:46,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7690 states, 7689 states have (on average 3.403953700091039) internal successors, (26173), 7689 states have internal predecessors, (26173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:46,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7690 states to 7690 states and 26173 transitions. [2021-07-13 20:34:46,498 INFO L78 Accepts]: Start accepts. Automaton has 7690 states and 26173 transitions. Word has length 30 [2021-07-13 20:34:46,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:46,498 INFO L482 AbstractCegarLoop]: Abstraction has 7690 states and 26173 transitions. [2021-07-13 20:34:46,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:46,498 INFO L276 IsEmpty]: Start isEmpty. Operand 7690 states and 26173 transitions. [2021-07-13 20:34:46,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:34:46,511 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:46,511 INFO L508 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] [2021-07-13 20:34:46,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable596 [2021-07-13 20:34:46,711 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:46,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:46,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1319108140, now seen corresponding path program 144 times [2021-07-13 20:34:46,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:46,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674040770] [2021-07-13 20:34:46,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:46,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:47,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:47,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:47,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674040770] [2021-07-13 20:34:47,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674040770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:47,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893515911] [2021-07-13 20:34:47,625 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:47,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:34:47,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:47,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:34:47,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:48,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:48,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:48,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:48,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-07-13 20:34:48,335 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:34:48,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:48,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:48,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-07-13 20:34:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:48,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893515911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:48,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:48,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-13 20:34:48,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391827800] [2021-07-13 20:34:48,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:34:48,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:48,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:34:48,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:34:48,660 INFO L87 Difference]: Start difference. First operand 7690 states and 26173 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2021-07-13 20:34:49,276 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-07-13 20:34:49,862 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-07-13 20:34:50,250 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-07-13 20:34:51,590 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-07-13 20:34:51,971 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-07-13 20:34:52,700 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-07-13 20:34:54,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:54,419 INFO L93 Difference]: Finished difference Result 9796 states and 32963 transitions. [2021-07-13 20:34:54,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:34:54,420 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 30 [2021-07-13 20:34:54,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:54,441 INFO L225 Difference]: With dead ends: 9796 [2021-07-13 20:34:54,441 INFO L226 Difference]: Without dead ends: 9761 [2021-07-13 20:34:54,441 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 4534.8ms TimeCoverageRelationStatistics Valid=304, Invalid=1766, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:34:54,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9761 states. [2021-07-13 20:34:54,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9761 to 7708. [2021-07-13 20:34:54,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7708 states, 7707 states have (on average 3.40352925911509) internal successors, (26231), 7707 states have internal predecessors, (26231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:54,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7708 states to 7708 states and 26231 transitions. [2021-07-13 20:34:54,589 INFO L78 Accepts]: Start accepts. Automaton has 7708 states and 26231 transitions. Word has length 30 [2021-07-13 20:34:54,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:54,589 INFO L482 AbstractCegarLoop]: Abstraction has 7708 states and 26231 transitions. [2021-07-13 20:34:54,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2021-07-13 20:34:54,590 INFO L276 IsEmpty]: Start isEmpty. Operand 7708 states and 26231 transitions. [2021-07-13 20:34:54,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:34:54,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:54,601 INFO L508 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] [2021-07-13 20:34:54,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable599,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:54,802 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:54,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:54,802 INFO L82 PathProgramCache]: Analyzing trace with hash -331160296, now seen corresponding path program 145 times [2021-07-13 20:34:54,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:54,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150597998] [2021-07-13 20:34:54,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:55,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:55,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:55,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150597998] [2021-07-13 20:34:55,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150597998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:55,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220441241] [2021-07-13 20:34:55,744 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:55,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:55,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:34:55,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:56,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:56,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:56,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:34:56,510 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:34:56,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:56,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:56,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-07-13 20:34:56,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:56,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220441241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:56,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:56,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-13 20:34:56,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104196532] [2021-07-13 20:34:56,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:34:56,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:56,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:34:56,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:34:56,865 INFO L87 Difference]: Start difference. First operand 7708 states and 26231 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:58,500 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-07-13 20:34:58,971 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-07-13 20:35:00,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:00,416 INFO L93 Difference]: Finished difference Result 9863 states and 33168 transitions. [2021-07-13 20:35:00,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:35:00,416 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:35:00,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:00,438 INFO L225 Difference]: With dead ends: 9863 [2021-07-13 20:35:00,438 INFO L226 Difference]: Without dead ends: 9828 [2021-07-13 20:35:00,438 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 3031.5ms TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:35:00,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9828 states. Received shutdown request... [2021-07-13 20:35:00,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9828 to 7722. [2021-07-13 20:35:00,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7722 states, 7721 states have (on average 3.4030565988861547) internal successors, (26275), 7721 states have internal predecessors, (26275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:00,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-07-13 20:35:00,774 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 20:35:00,776 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 20:35:00,778 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 20:35:00,778 INFO L202 PluginConnector]: Adding new model array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 08:35:00 BasicIcfg [2021-07-13 20:35:00,778 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 20:35:00,778 INFO L168 Benchmark]: Toolchain (without parser) took 786844.65 ms. Allocated memory was 176.2 MB in the beginning and 1.2 GB in the end (delta: 1.0 GB). Free memory was 157.2 MB in the beginning and 514.0 MB in the end (delta: -356.8 MB). Peak memory consumption was 686.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:35:00,779 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 176.2 MB. Free memory is still 158.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:35:00,779 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.86 ms. Allocated memory is still 176.2 MB. Free memory was 157.0 MB in the beginning and 155.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:35:00,779 INFO L168 Benchmark]: Boogie Preprocessor took 15.04 ms. Allocated memory is still 176.2 MB. Free memory was 155.7 MB in the beginning and 154.7 MB in the end (delta: 922.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:35:00,779 INFO L168 Benchmark]: RCFGBuilder took 202.47 ms. Allocated memory is still 176.2 MB. Free memory was 154.6 MB in the beginning and 142.9 MB in the end (delta: 11.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-07-13 20:35:00,779 INFO L168 Benchmark]: TraceAbstraction took 786591.65 ms. Allocated memory was 176.2 MB in the beginning and 1.2 GB in the end (delta: 1.0 GB). Free memory was 142.5 MB in the beginning and 514.0 MB in the end (delta: -371.5 MB). Peak memory consumption was 671.3 MB. Max. memory is 8.0 GB. [2021-07-13 20:35:00,779 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 176.2 MB. Free memory is still 158.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 26.86 ms. Allocated memory is still 176.2 MB. Free memory was 157.0 MB in the beginning and 155.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 15.04 ms. Allocated memory is still 176.2 MB. Free memory was 155.7 MB in the beginning and 154.7 MB in the end (delta: 922.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 202.47 ms. Allocated memory is still 176.2 MB. Free memory was 154.6 MB in the beginning and 142.9 MB in the end (delta: 11.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 786591.65 ms. Allocated memory was 176.2 MB in the beginning and 1.2 GB in the end (delta: 1.0 GB). Free memory was 142.5 MB in the beginning and 514.0 MB in the end (delta: -371.5 MB). Peak memory consumption was 671.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 48 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 786505.0ms, OverallIterations: 244, TraceHistogramMax: 2, EmptinessCheckTime: 2331.3ms, AutomataDifference: 548335.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 49.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 14969 SDtfs, 63096 SDslu, 136961 SDs, 0 SdLazy, 282503 SolverSat, 15026 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 185947.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16422 GetRequests, 4942 SyntacticMatches, 300 SemanticMatches, 11180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213360 ImplicationChecksByTransitivity, 436811.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=7741occurred in iteration=230, InterpolantAutomatonStates: 9608, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 29246.0ms AutomataMinimizationTime, 244 MinimizatonAttempts, 546576 StatesRemovedByMinimization, 243 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 873.1ms SsaConstructionTime, 2335.4ms SatisfiabilityAnalysisTime, 150025.2ms InterpolantComputationTime, 13887 NumberOfCodeBlocks, 13883 NumberOfCodeBlocksAsserted, 763 NumberOfCheckSat, 13407 ConstructedInterpolants, 226 QuantifiedInterpolants, 201317 SizeOfPredicates, 1602 NumberOfNonLiveVariables, 15202 ConjunctsInSsa, 5000 ConjunctsInUnsatCore, 480 InterpolantComputations, 8 PerfectInterpolantSequences, 198/3297 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